134 results on '"Gai, Marco"'
Search Results
2. Comparison of the H2O, HDO and δD stratospheric climatologies between the MIPAS-ESA V8, MIPAS-IMK V5 and ACE-FTS V4.1/4.2 satellite datasets.
- Author
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De Los Ríos, Karen, Ordoñez, Paulina, Stiller, Gabriele P., Raspollini, Piera, Gai, Marco, Walker, Kaley A., Peña-Ortiz, Cristina, and Acosta, Luis
- Subjects
WATER vapor transport ,CLIMATOLOGY ,COMPOSITION of water ,MAGNETIC recorders & recording ,WATER vapor ,ATMOSPHERIC water vapor measurement - Abstract
Variations in the isotopologic composition of water vapour are fundamental for understanding the relative importance of different mechanisms of water vapour transport from the tropical upper troposphere to the lower stratosphere. Previous comparisons obtained from observations of H2O and HDO by satellite instruments showed discrepancies. In this work, newer versions of H2O and HDO retrievals from Envisat/MIPAS and SCISAT/ACE-FTS are compared. Specifically, MIPAS-IMK V5, MIPAS-ESA V8 and ACE-FTS V4.1/4.2 for the common period from February 2004 to April 2012 are compared for the first time through a profile-to-profile approach and comparison based on climatological structures. The comparison is essential for the scientific community to assess the quality of new satellite data products, a necessary procedure to validate further scientific work. Averaged stratospheric H2O profiles reveal general good agreement between 16 and 30 km. Biases derived from the profile-to-profile comparison are around zero between 16 and 30 km for MIPAS-IMK and ACE-FTS comparison. For HDO and δ D, low biases are found in the MIPAS-ESA and ACE-FTS comparison in the same range of altitudes, even if associated with a larger de-biased standard deviation. The zonally averaged cross sections of H2O and HDO exhibit the expected distribution that has been established in previous studies. For δ D the tropical depletion in MIPAS-ESA occurs at the top of the dynamical tropopause, but this minimum is found at higher altitudes in the ACE-FTS and MIPAS-IMK dataset. The tape recorder signal is present in H2O and HDO for the three databases with slight quantitative differences. The δ D annual variation for ACE-FTS data and MIPAS-ESA data is weaker compared to the MIPAS-IMK dataset, which shows a coherent tape recorder signal clearly detectable up to at least 30 km. The observed differences in the climatological δ D composites between databases could lead to different interpretations regarding the water vapour transport processes toward the stratosphere. Therefore, it is important to further improve the quality of level 2 products. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
3. Comparison of the H2O, HDO and δD stratospheric climatologies between the MIPAS-ESA v8, MIPAS-IMK v5 and ACE-FTS v4.1/4.2 satellite data sets
- Author
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De Los Ríos, Karen, primary, Ordoñez, Paulina, additional, Stiller, Gabriele P., additional, Raspollini, Piera, additional, Gai, Marco, additional, Walker, Kaley A., additional, Peña-Ortiz, Cristina, additional, and Acosta, Luis, additional
- Published
- 2023
- Full Text
- View/download PDF
4. Comparison of the H2O, HDO and δD stratospheric climatologies between the MIPAS-ESA v8, MIPAS-IMK v5 and ACE-FTS v4.1/4.2 satellite data sets
- Author
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Los Ríos, Karen, Ordoñez, Paulina, Stiller, Gabriele P., Raspollini, Piera, Gai, Marco, Walker, Kaley A., Peña-Ortiz, Cristina, and Acosta, Luis
- Abstract
Variations in the isotopological composition of water vapour are fundamental for understanding the relative importance of different mechanisms of water vapor transport from the tropical upper troposphere to the lower stratosphere. Previous comparisons obtained from observations of H2O and HDO by satellite instruments showed discrepancies. In this work, newer versions of H2O and HDO retrievals from Envisat/MIPAS are compared with data derived from SCISAT/ACE-FTS. Specifically, MIPAS-IMK V5, MIPAS-ESA V8, and ACE-FTS V4.1/4.2 for the common period from February 2004 to April 2012 are compared for the first time through a profile-to-profile approach and comparison based on climatological structures. Stratospheric H2O and HDO global average coincident profiles reveal good agreement. The smallest biases are found between 20 and 30 km, and the largest biases are exhibited around 40 km both in absolute and relative terms. For HDO, biases between -8.6–10.6 % are observed among the three databases in the altitudes of 16 to 30 km. However, around 40 km, ACE-FTS agrees better to MIPAS-IMK than MIPAS-ESA, with biases of -4.8 % and -37.5 %, respectively. The HDO bias between MIPAS-IMK and MIPAS ESA is 28.1 % at this altitude. The meridional cross-sections of H2O and HDO exhibit the expected distribution that has been established in previous studies. The tape recorder signal is present in H2O and HDO for the three databases with slight quantitative differences. The meridional cross-sections of δD are in good agreement with the previous version of MIPAS-IMK and ACE-FTS data. In the temporal δD variations, the results suggest that in the current data versions, the calculated isotopic composition (δD) from MIPAS-IMK aligns more closely with expected stratospheric behavior for the entire stratosphere. Nevertheless, there are differences in the climatological δD composites between databases that could lead to different interpretations regarding the water vapor transport processes toward the stratosphere, so it is important to intercompare these δD observations.
- Published
- 2023
5. The Far-Infrared Radiation Mobile Observation System (FIRMOS) for spectral characterization of the atmospheric emission
- Author
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Belotti, Claudio, primary, Barbara, Flavio, additional, Barucci, Marco, additional, Bianchini, Giovanni, additional, D'Amato, Francesco, additional, Del Bianco, Samuele, additional, Di Natale, Gianluca, additional, Gai, Marco, additional, Montori, Alessio, additional, Pratesi, Filippo, additional, Rettinger, Markus, additional, Rolf, Christian, additional, Sussmann, Ralf, additional, Trickl, Thomas, additional, Viciani, Silvia, additional, Vogelmann, Hannes, additional, and Palchetti, Luca, additional
- Published
- 2023
- Full Text
- View/download PDF
6. GBB-Nadir and KLIMA: Two Full Physics Codes for the Computation of the Infrared Spectrum of the Planetary Radiation Escaping to Space
- Author
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Dinelli, Bianca Maria, primary, Del Bianco, Samuele, additional, Castelli, Elisa, additional, Di Roma, Alessio, additional, Lorenzi, Giacomo, additional, Premuda, Margherita, additional, Barbara, Flavio, additional, Gai, Marco, additional, Raspollini, Piera, additional, and Di Natale, Gianluca, additional
- Published
- 2023
- Full Text
- View/download PDF
7. Towards Space Deployment of the NDSA Concept for Tropospheric Water Vapour Measurements
- Author
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Facheris, Luca, primary, Antonini, Andrea, additional, Argenti, Fabrizio, additional, Barbara, Flavio, additional, Cortesi, Ugo, additional, Cuccoli, Fabrizio, additional, Del Bianco, Samuele, additional, Dogo, Federico, additional, Feta, Arjan, additional, Gai, Marco, additional, Gregorio, Anna, additional, Macelloni, Giovanni, additional, Mazzinghi, Agnese, additional, Melani, Samantha, additional, Montomoli, Francesco, additional, Ortolani, Alberto, additional, Rovai, Luca, additional, Severin, Luca, additional, and Scopa, Tiziana, additional
- Published
- 2023
- Full Text
- View/download PDF
8. Comparison of the H2O, HDO and δD stratospheric climatologies between the MIPAS-ESA v8, MIPAS-IMK v5 and ACE-FTS v4.1/4.2 satellite data sets.
- Author
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Ríos, Karen De Los, Ordoñez, Paulina, Stiller, Gabriele P., Raspollini, Piera, Gai, Marco, Walker, Kaley A., Peña-Ortiz, Cristina, and Acosta, Luis
- Subjects
WATER vapor transport ,COMPOSITION of water ,CLIMATOLOGY ,WATER vapor ,STRATOSPHERE ,ATMOSPHERIC water vapor measurement ,OZONE layer ,RESEARCH aircraft - Abstract
Variations in the isotopological composition of water vapour are fundamental for understanding the relative importance of different mechanisms of water vapor transport from the tropical upper troposphere to the lower stratosphere. Previous comparisons obtained from observations of H
2 O and HDO by satellite instruments showed discrepancies. In this work, newer versions of H2 O and HDO retrievals from Envisat/MIPAS are compared with data derived from SCISAT/ACE-FTS. Specifically, MIPAS-IMK V5, MIPAS-ESA V8, and ACE-FTS V4.1/4.2 for the common period from February 2004 to April 2012 are compared for the first time through a profile-to-profile approach and comparison based on climatological structures. Stratospheric H2 O and HDO global average coincident profiles reveal good agreement. The smallest biases are found between 20 and 30 km, and the largest biases are exhibited around 40 km both in absolute and relative terms. For HDO, biases between -8.6–10.6 % are observed among the three databases in the altitudes of 16 to 30 km. However, around 40 km, ACE-FTS agrees better to MIPAS-IMK than MIPAS-ESA, with biases of -4.8 % and -37.5 %, respectively. The HDO bias between MIPAS-IMK and MIPAS ESA is 28.1 % at this altitude. The meridional cross-sections of H2 O and HDO exhibit the expected distribution that has been established in previous studies. The tape recorder signal is present in H2 O and HDO for the three databases with slight quantitative differences. The meridional cross-sections of δD are in good agreement with the previous version of MIPAS-IMK and ACE-FTS data. In the temporal δD variations, the results suggest that in the current data versions, the calculated isotopic composition (δD) from MIPAS-IMK aligns more closely with expected stratospheric behavior for the entire stratosphere. Nevertheless, there are differences in the climatological δD composites between databases that could lead to different interpretations regarding the water vapor transport processes toward the stratosphere, so it is important to intercompare these δD observations. [ABSTRACT FROM AUTHOR]- Published
- 2023
- Full Text
- View/download PDF
9. Comparison of the H2O, HDO and δD stratospheric climatologies between the MIPAS-ESA v8, MIPAS-IMK v5 and ACE-FTS v4.1/4.2 satellite data sets.
- Author
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De Los Ríos, Karen, Ordoñez, Paulina, Stiller, Gabriele P., Raspollini, Piera, Gai, Marco, Walker, Kaley A., Peña-Ortiz, Cristina, and Acosta, Luis
- Subjects
COMPOSITION of water ,CLIMATOLOGY ,WATER vapor ,STRATOSPHERE ,MAGNETIC recorders & recording ,ATMOSPHERIC water vapor measurement ,RESEARCH aircraft ,WATER vapor transport - Abstract
Variations in the isotopological composition of water vapour are fundamental for understanding the relative importance of different mechanisms of water vapor transport from the tropical upper troposphere to the lower stratosphere. Previous comparisons obtained from observations of H
2 O and HDO by satellite instruments showed discrepancies. In this work, newer versions of H2 O and HDO retrievals from Envisat/MIPAS are compared with data derived from SCISAT/ACE-FTS. Specifically, MIPAS-IMK V5, MIPAS-ESA V8, and ACE-FTS V4.1/4.2 for the common period from February 2004 to April 2012 are compared for the first time through a profile-to-profile approach and comparison based on climatological structures. Stratospheric H2 O and HDO global average coincident profiles reveal good agreement. The smallest biases are found between 20 and 30 km, and the largest biases are exhibited around 40 km both in absolute and relative terms. For HDO, biases between -8.6-10.6 % are observed among the three databases in the altitudes of 16 to 30 km. However, around 40 km, ACE-FTS agrees better to MIPAS-IMK than MIPAS-ESA, with biases of -4.8% and -37.5%, respectively. The HDO bias between MIPAS-IMK and MIPAS ESA is 28.1 % at this altitude. The meridional cross-sections of H2 O and HDO exhibit the expected distribution that has been established in previous studies. The tape recorder signal is present in H2 O and HDO for the three databases with slight quantitative differences. The meridional cross-sections of (δD are in good agreement with the previous version of MIPAS-IMK and ACE-FTS data. In the temporal (δD variations, the results suggest that in the current data versions, the calculated isotopic composition ((δD) from MIPAS-IMK aligns more closely with expected stratospheric behavior for the entire stratosphere. Nevertheless, there are differences in the climatological (δD composites between databases that could lead to different interpretations regarding the water vapor transport processes toward the stratosphere, so it is important to intercompare these (δD observations. [ABSTRACT FROM AUTHOR]- Published
- 2023
- Full Text
- View/download PDF
10. The Far-Infrared Radiation Mobile Observation System for spectral characterisation of the atmospheric emission
- Author
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Belotti, Claudio, primary, Barbara, Flavio, additional, Barucci, Marco, additional, Bianchini, Giovanni, additional, D'Amato, Francesco, additional, Del Bianco, Samuele, additional, Di Natale, Gianluca, additional, Gai, Marco, additional, Montori, Alessio, additional, Pratesi, Filippo, additional, Rettinger, Markus, additional, Rolf, Christian, additional, Sussmann, Ralf, additional, Trickl, Thomas, additional, Viciani, Silvia, additional, Vogelman, Hannes, additional, and Palchetti, Luca, additional
- Published
- 2022
- Full Text
- View/download PDF
11. Level 2 processor and auxiliary data for ESA Version 8 final full mission analysis of MIPAS measurements on ENVISAT
- Author
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Ministerio de Ciencia e Innovación (España), European Commission, European Space Agency, Raspollini, Piera, Arnone, Enrico, Barbara, Flavio, Bianchini, Massimo, Carli, Bruno, Ceccherini, Simone, Chipperfield, Martyn P., Dehn, Angelika, Della Fera, Stefano, Dinelli, Bianca Maria, Dudhia, Anu, Flaud, Jean-Marie, Gai, Marco, Kiefer, Michael, López-Puertas, Manuel, Moore, David P., Piro, Alessandro, Remedios, John J., Ridolfi, Marco, Sembhi, Harjinder, Sgheri, Luca, Zoppetti, Nicola, Ministerio de Ciencia e Innovación (España), European Commission, European Space Agency, Raspollini, Piera, Arnone, Enrico, Barbara, Flavio, Bianchini, Massimo, Carli, Bruno, Ceccherini, Simone, Chipperfield, Martyn P., Dehn, Angelika, Della Fera, Stefano, Dinelli, Bianca Maria, Dudhia, Anu, Flaud, Jean-Marie, Gai, Marco, Kiefer, Michael, López-Puertas, Manuel, Moore, David P., Piro, Alessandro, Remedios, John J., Ridolfi, Marco, Sembhi, Harjinder, Sgheri, Luca, and Zoppetti, Nicola
- Abstract
High quality long-term data sets of altitude-resolved measurements of the atmospheric composition are important because they can be used both to study the evolution of the atmosphere and as a benchmark for future missions. For the final ESA reprocessing of MIPAS (Michelson Interferometer for Passive Atmospheric Sounding) on ENVISAT (ENViromental SATellite) data, numerous improvements were implemented in the Level 2 (L2) processor Optimised Retrieval Model (ORM) version 8.22 (V8) and its auxiliary data. The implemented changes involve all aspects of the processing chain, from the modelling of the measurements with the handling of the horizontal inhomogeneities along the line of sight to the use of the optimal estimation technique to retrieve the minor species, from a more sensitive approach to detecting the spectra affected by clouds to a refined method for identifying low quality products. Improvements in the modelling of the measurements were also obtained with an update of the used spectroscopic data and of the databases providing the a priori knowledge of the atmosphere. The HITRAN_mipas_pf4.45 spectroscopic database was finalised with new spectroscopic data verified with MIPAS measurements themselves, while recently measured cross-sections were used for the heavy molecules. The Level 2 Initial Guess (IG2) data set, containing the climatology used by the MIPAS L2 processor to generate the initial guess and interfering species profiles when the retrieved profiles from previous scans are not available, was improved taking into account the diurnal variation of the profiles defined using climatologies from both measurements and models. Horizontal gradients were generated using the ECMWF ERA-Interim data closest in time and space to the MIPAS data. Further improvements in the L2 V8 products derived from the use of the L1b V8 products, which were upgraded to reduce the instrumental temporal drift and to handle the abrupt changes in the calibration gain. The improvement
- Published
- 2022
12. Gold nanorods for paper-based genetic assays
- Author
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Borri, Claudia, primary, Centi, Sonia, additional, Chioccioli, Sofia, additional, Bogani, Patrizia, additional, Micheletti, Filippo, additional, Gai, Marco, additional, Grandi, Paolo, additional, Laschi, Serena, additional, Tona, Francesco, additional, Barucci, Andrea, additional, Zoppetti, Nicola, additional, Pini, Roberto, additional, and Ratto, Fulvio, additional
- Published
- 2022
- Full Text
- View/download PDF
13. Level 2 processor and auxiliary data for ESA Version 8 final full mission analysis of MIPAS measurements on ENVISAT
- Author
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Raspollini, Piera, primary, Arnone, Enrico, additional, Barbara, Flavio, additional, Bianchini, Massimo, additional, Carli, Bruno, additional, Ceccherini, Simone, additional, Chipperfield, Martyn P., additional, Dehn, Angelika, additional, Della Fera, Stefano, additional, Dinelli, Bianca Maria, additional, Dudhia, Anu, additional, Flaud, Jean-Marie, additional, Gai, Marco, additional, Kiefer, Michael, additional, López-Puertas, Manuel, additional, Moore, David P., additional, Piro, Alessandro, additional, Remedios, John J., additional, Ridolfi, Marco, additional, Sembhi, Harjinder, additional, Sgheri, Luca, additional, and Zoppetti, Nicola, additional
- Published
- 2022
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- View/download PDF
14. Integrated Water Vapor Estimation Through Microwave Propagation Measurements: First Experiment on a Ground-to-Ground Radio Link
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Montomoli, Francesco, primary, Macelloni, Giovanni, additional, Facheris, Luca, additional, Cuccoli, Fabrizio, additional, Del Bianco, Samuele, additional, Gai, Marco, additional, Cortesi, Ugo, additional, Di Natale, Gianluca, additional, Toccafondi, Alberto, additional, Puggelli, Federico, additional, Antonini, Andrea, additional, Volpi, L., additional, Dei, D., additional, Grandi, P., additional, Mariottini, F., additional, and Cucini, A., additional
- Published
- 2022
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- View/download PDF
15. The ESA MIPAS/Envisat level2-v8 dataset: 10 years of measurements retrieved with ORM v8.22
- Author
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Dinelli, Bianca Maria, primary, Raspollini, Piera, additional, Gai, Marco, additional, Sgheri, Luca, additional, Ridolfi, Marco, additional, Ceccherini, Simone, additional, Barbara, Flavio, additional, Zoppetti, Nicola, additional, Castelli, Elisa, additional, Papandrea, Enzo, additional, Pettinari, Paolo, additional, Dehn, Angelika, additional, Dudhia, Anu, additional, Kiefer, Michael, additional, Piro, Alessandro, additional, Flaud, Jean-Marie, additional, López-Puertas, Manuel, additional, Moore, David, additional, Remedios, John, additional, and Bianchini, Massimo, additional
- Published
- 2021
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16. Phosgene distribution derived from MIPAS ESA v8 data: intercomparisons and trends
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Pettinari, Paolo, primary, Barbara, Flavio, additional, Ceccherini, Simone, additional, Dinelli, Bianca Maria, additional, Gai, Marco, additional, Raspollini, Piera, additional, Sgheri, Luca, additional, Valeri, Massimo, additional, Wetzel, Gerald, additional, Zoppetti, Nicola, additional, and Ridolfi, Marco, additional
- Published
- 2021
- Full Text
- View/download PDF
17. Paper-based genetic assays with bioconjugated gold nanorods and an automated readout pipeline
- Author
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Borri, Claudia, primary, Centi, Sonia, additional, Chioccioli, Sofia, additional, Bogani, Patrizia, additional, Micheletti, Filippo, additional, Gai, Marco, additional, Grandi, Paolo, additional, Laschi, Serena, additional, Tona, Francesco, additional, Barucci, Andrea, additional, Zoppetti, Nicola, additional, Pini, Roberto, additional, and Ratto, Fulvio, additional
- Published
- 2021
- Full Text
- View/download PDF
18. Comparison of mid-latitude single- and mixed-phase cloud optical depth from co-located infrared spectrometer and backscatter lidar measurements
- Author
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Di Natale, Gianluca, primary, Barucci, Marco, additional, Belotti, Claudio, additional, Bianchini, Giovanni, additional, D'Amato, Francesco, additional, Del Bianco, Samuele, additional, Gai, Marco, additional, Montori, Alessio, additional, Sussmann, Ralf, additional, Viciani, Silvia, additional, Vogelmann, Hannes, additional, and Palchetti, Luca, additional
- Published
- 2021
- Full Text
- View/download PDF
19. The Far-Infrared Radiation Mobile Observation System for spectral characterisation of the atmospheric emission.
- Author
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Belotti, Claudio, Barbara, Flavio, Barucci, Marco, Bianchini, Giovanni, D’Amato, Francesco, Del Bianco, Samuele, Di Natale, Gianluca, Gai, Marco, Montori, Alessio, Pratesi, Filippo, Rettinger, Markus, Rolf, Christian, Sussmann, Ralf, Trickl, Thomas, Viciani, Silvia, Vogelmann, Hannes, and Palchetti, Luca
- Subjects
WATER vapor ,RADIATION measurements ,RAMAN effect ,UNITED Nations Framework Convention on Climate Change (1992). Protocols, etc., 1997 December 11 ,RADIATION ,WATER temperature - Abstract
The Far-Infrared Radiation Mobile Observation System (FIRMOS) is a Fourier transform spectroradiometer developed to support the Far-infrared Outgoing Radiation Understanding and Monitoring (FORUM) satellite mission by validating measurement methods and instrument design concepts, both in the laboratory and in field campaigns. FIRMOS is capable of measuring the downwelling spectral radiance emitted by the atmosphere in the spectral band from 100 to 1000 cm
−1 (10–100 µm in wavelength), with a maximum spectral resolution of 0.25 cm−1 . We describe the instrument design and its characterisation and discuss the geophysical products obtained by inverting the atmospheric spectral radiance measured during a campaign from the high-altitude location of Mount Zugspitze in Germany, beside the Extended-range Atmospheric Emitted Radiance Interferometer (E-AERI), which is permanently installed at the site. Following the selection of clear-sky scenes, using a specific algorithm, the water vapour and temperature profiles were retrieved from the FIRMOS spectra by applying the Kyoto protocol and Informed Management of the Adaptation (KLIMA) code. The profiles were found in very good agreement with those provided by radiosondes and by the Raman lidar operating from the Zugspitze Schneefernerhaus station. In addition, the retrieval products were validated by comparing the retrieved Integrated Water Vapour values with those obtained from the E-AERI spectra. Finally, we found that the trends for the temperature, and the water vapour profiles over time were in good agreement with those provided by ERA5 reanalysis. [ABSTRACT FROM AUTHOR]- Published
- 2022
- Full Text
- View/download PDF
20. Supplementary material to "The ESA MIPAS/ENVISAT Level2-v8 dataset: 10 years of measurements retrieved with ORM v8.22"
- Author
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Dinelli, Bianca Maria, primary, Raspollini, Piera, additional, Gai, Marco, additional, Sgheri, Luca, additional, Ridolfi, Marco, additional, Ceccherini, Simone, additional, Barbara, Flavio, additional, Zoppetti, Nicola, additional, Castelli, Elisa, additional, Papandrea, Enzo, additional, Pettinari, Paolo, additional, Dehn, Angelika, additional, Dudhia, Anu, additional, Kiefer, Michael, additional, Piro, Alessandro, additional, Flaud, Jean-Marie, additional, Lopez-Puertas, Manuel, additional, Moore, David, additional, Remedios, John, additional, and Bianchini, Massimo, additional
- Published
- 2021
- Full Text
- View/download PDF
21. Level 2 processor and auxiliary data for ESA Version 8 final full mission analysis of MIPAS measurements on ENVISAT
- Author
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Raspollini, Piera, primary, Arnone, Enrico, additional, Barbara, Flavio, additional, Bianchini, Massimo, additional, Carli, Bruno, additional, Ceccherini, Simone, additional, Chipperfield, Martyn P., additional, Dehn, Angelika, additional, Della Fera, Stefano, additional, Dinelli, Bianca Maria, additional, Dudhia, Anu, additional, Flaud, Jean-Marie, additional, Gai, Marco, additional, Kiefer, Michael, additional, López-Puertas, Manuel, additional, Moore, David P., additional, Piro, Alessandro, additional, Remedios, John J., additional, Ridolfi, Marco, additional, Sembhi, Harjinder, additional, Sgheri, Luca, additional, and Zoppetti, Nicola, additional
- Published
- 2021
- Full Text
- View/download PDF
22. Observations of the downwelling far-infrared atmospheric emission at the Zugspitze observatory
- Author
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Palchetti, Luca, primary, Barucci, Marco, additional, Belotti, Claudio, additional, Bianchini, Giovanni, additional, Cluzet, Bertrand, additional, D'Amato, Francesco, additional, Del Bianco, Samuele, additional, Di Natale, Gianluca, additional, Gai, Marco, additional, Khordakova, Dina, additional, Montori, Alessio, additional, Oetjen, Hilke, additional, Rettinger, Markus, additional, Rolf, Christian, additional, Schuettemeyer, Dirk, additional, Sussmann, Ralf, additional, Viciani, Silvia, additional, Vogelmann, Hannes, additional, and Wienhold, Frank Gunther, additional
- Published
- 2021
- Full Text
- View/download PDF
23. The ESA MIPAS/Envisat level2-v8 dataset: 10 years of measurements retrieved with ORM v8.22
- Author
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European Space Agency, European Commission, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), Dinelli, Bianca Maria, Raspollini, Piera, Gai, Marco, Sgheri, Luca, Ridolfi, Marco, Ceccherini, Simone, Barbara, Flavio, Zoppetti, Nicola, Castelli, Elisa, Papandrea, Enzo, Pettinari, Paolo, Dehn, Angelika, Dudhia, Anu, Kiefer, Michael, Piro, Alessandro, Flaud, Jean-Marie, López-Puertas, Manuel, Moore, David, Remedios, John, Bianchini, Massimo, European Space Agency, European Commission, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), Dinelli, Bianca Maria, Raspollini, Piera, Gai, Marco, Sgheri, Luca, Ridolfi, Marco, Ceccherini, Simone, Barbara, Flavio, Zoppetti, Nicola, Castelli, Elisa, Papandrea, Enzo, Pettinari, Paolo, Dehn, Angelika, Dudhia, Anu, Kiefer, Michael, Piro, Alessandro, Flaud, Jean-Marie, López-Puertas, Manuel, Moore, David, Remedios, John, and Bianchini, Massimo
- Abstract
The observations acquired during the full mission of the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) instrument, aboard the European Space Agency Environmental Satellite (Envisat), have been analysed with version 8.22 of the Optimised Retrieval Model (ORM), originally developed as the scientific prototype of the ESA level-2 processor for MIPAS observations. The results of the analyses have been included into the MIPAS level-2 version 8 (level2-v8) database containing atmospheric fields of pressure, temperature, and volume mixing ratio (VMR) of MIPAS main targets H2O, O3, HNO3, CH4, N2O, and NO2, along with the minor gases CFC-11, ClONO2, N2O5, CFC-12, COF2, CCl4, CF4, HCFC-22, C2H2, CH3Cl, COCl2, C2H6, OCS, and HDO. The database covers all the measurements acquired by MIPAS in the nominal measurement mode of the full resolution (FR) part of the mission (from July 2002 to March 2004) and all the observation modes of the optimised resolution (OR) part (from January 2005 to April 2012). The number of species included in the MIPAS level2-v8 dataset makes it of particular importance for the studies of stratospheric chemistry. The database is considered by ESA the final release of the MIPAS level-2 products. The ORM algorithm is operated at the vertical grid coincident to the tangent altitudes of the observations or to a subset of them, spanning (in the nominal mode) the altitude range from 6 to 68 km in the FR phase and from 6 to 70 km in the OR period. In the latitude domain, FR profiles are spaced by about 4.7ĝ, while the OR profiles are spaced by about 3.7ĝ. For each retrieved species, the auxiliary data and the retrieval choices are described. Each product is characterised in terms of the retrieval error, spatial resolution, and "useful"vertical range in both phases of the MIPAS mission. These depend on the characteristics of the measurements (spectral and vertical resolution of the measurements), the retrieval choices (number of spectral points
- Published
- 2021
24. Application of the Complete Data Fusion algorithm to the ozone profiles measured by geostationary and low-Earth-orbit satellites: a feasibility study
- Author
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Zoppetti, Nicola, primary, Ceccherini, Simone, additional, Carli, Bruno, additional, Del Bianco, Samuele, additional, Gai, Marco, additional, Tirelli, Cecilia, additional, Barbara, Flavio, additional, Dragani, Rossana, additional, Arola, Antti, additional, Kujanpää, Jukka, additional, van Peet, Jacob C. A., additional, van der A, Ronald, additional, and Cortesi, Ugo, additional
- Published
- 2021
- Full Text
- View/download PDF
25. A Distributed Modular Data Processing Chain Applied to Simulated Satellite Ozone Observations
- Author
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Gai, Marco, primary, Barbara, Flavio, additional, Ceccherini, Simone, additional, Cortesi, Ugo, additional, Del Bianco, Samuele, additional, Tirelli, Cecilia, additional, Zoppetti, Nicola, additional, Belotti, Claudio, additional, Canessa, Bruno, additional, Farruggia, Vincenzo, additional, Masini, Andrea, additional, Keppens, Arno, additional, Lambert, Jean-Christopher, additional, Arola, Antti, additional, Lipponen, Antti, additional, and Tuinder, Olaf, additional
- Published
- 2021
- Full Text
- View/download PDF
26. ESA Version 8 reprocessing of the 10 years of MIPAS on ENVISAT measurements
- Author
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Raspollini, Piera, Barbara, Flavio, Bianchini, M., Birk, Manfred, Ceccherini, Simone, Dehn, Angelika, Dudhia, Anu, Dinelli, Bianca Maria, Flaud, J.-M., Gai, Marco, Hoepfner, Michael, Daan, Hubert, Keppens, Arno, Kiefer, Michael, Kleinert, A., Moore, D., Papandrea, E., Perron, Gaétan, Piro, A., López-Puertas, Manuel, Oelhaf, H., Pettinari, Paolo, Remedios, J., Ridolfi, Marco, Sgheri, Luca, Wagner, Georg, Wetzel, G., and Zoppetti, Nicole
- Subjects
L1 processing ,MIPAS ,MIPAS/ENVISAT ,satellite remote sensing ,Atmospheric composition ,Fourier-transform spectroscopy ,Level 2 data quality ,L2 Processing ,atmospheric trace gases - Abstract
MIPAS is a Fourier Transform spectrometer that measured the atmospheric limb emission spectra in the middle infrared on board the ENVISAT satellite. These measurements allowed the global monitoring of the three-dimensional (latitude, longitude and altitude) distribution of concentrations of many species, during both day and night, for 10 years, from July 2002 to April 2012. Being a limb sounding instrument, the focus of MIPAS measurements was the study of the atmosphere from the upper troposphere to the stratosphere and above, up to the mesosphere. The interest in these measurements goes beyond the end of the mission, as they can be used in long time series of data to determine changes in our planet's climate. To this purpose, it is therefore important to continue improving their quality. The quality of MIPAS L2 products depends on the quality of the L1 products, on the L2 model accuracy, on the quality of auxiliary data, particularly on spectroscopic data. For the last reanalysis of the whole MIPAS mission, a significant effort was made by the MIPAS Quality Working Group, supported by ESA, to improve both L1 and L2 processors, as well as spectroscopy, with the objectives of obtaining L2 products with increased accuracy, better temporal stability, and a larger number of retrieved species. Here we present the full mission dataset, including vertical profiles of 21 trace species plus temperature, obtained by applying the latest version of ESA L2 processor (ORM V8) to the MIPAS L1 data obtained with version 8 of the L1 processor. The impact of the improvements of both L1 and L2 processors on the quality of the L2 products is presented, as well as results of the validation against independent correlative measurements.
- Published
- 2020
27. Data Fusion Analysis of Sentinel-4 and Sentinel-5 Simulated Ozone Data
- Author
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Tirelli, Cecilia, primary, Ceccherini, Simone, additional, Zoppetti, Nicola, additional, Del Bianco, Samuele, additional, Gai, Marco, additional, Barbara, Flavio, additional, Cortesi, Ugo, additional, Kujanpää, Jukka, additional, Huan, Yu, additional, and Dragani, Rossana, additional
- Published
- 2020
- Full Text
- View/download PDF
28. Advanced Ultraviolet Radiation and Ozone Retrieval for Applications—Surface Ultraviolet Radiation Products
- Author
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Lipponen, Antti, primary, Ceccherini, Simone, additional, Cortesi, Ugo, additional, Gai, Marco, additional, Keppens, Arno, additional, Masini, Andrea, additional, Simeone, Emilio, additional, Tirelli, Cecilia, additional, and Arola, Antti, additional
- Published
- 2020
- Full Text
- View/download PDF
29. The Complete Data Fusion as a ready to use tool for the exploitation of atmospheric Sentinel ozone profiles
- Author
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Zoppetti, Nicola, primary, Ceccherini, Simone, additional, Barbara, Flavio, additional, Del Bianco, Samuele, additional, Gai, Marco, additional, Poli, Gabriele, additional, Tirelli, Cecilia, additional, and Cortesi, Ugo, additional
- Published
- 2020
- Full Text
- View/download PDF
30. Supplementary material to "The Complete Data Fusion for a Full Exploitation of Copernicus Atmospheric Sentinel Level 2 Products"
- Author
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Zoppetti, Nicola, primary, Ceccherini, Simone, additional, Carli, Bruno, additional, Del Bianco, Samuele, additional, Gai, Marco, additional, Tirelli, Cecilia, additional, Barbara, Flavio, additional, Dragani, Rossana, additional, Arola, Antti, additional, Kujanpää, Jukka, additional, van Peet, Jacob C. A., additional, van der A, Ronald, additional, and Cortesi, Ugo, additional
- Published
- 2019
- Full Text
- View/download PDF
31. The Complete Data Fusion for a Full Exploitation of Copernicus Atmospheric Sentinel Level 2 Products
- Author
-
Zoppetti, Nicola, primary, Ceccherini, Simone, additional, Carli, Bruno, additional, Del Bianco, Samuele, additional, Gai, Marco, additional, Tirelli, Cecilia, additional, Barbara, Flavio, additional, Dragani, Rossana, additional, Arola, Antti, additional, Kujanpää, Jukka, additional, van Peet, Jacob C. A., additional, van der A, Ronald, additional, and Cortesi, Ugo, additional
- Published
- 2019
- Full Text
- View/download PDF
32. Polarization of Lidar Returns from Water Clouds: Calculations and Laboratory Scaled Measurements
- Author
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Bruscaglioni, Piero, Ismaelli, Andrea, Zaccanti, Giovanni, Gai, Marco, and Gurioli, Massimo
- Published
- 1995
- Full Text
- View/download PDF
33. Laboratory simulations of lidar returns from clouds
- Author
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Gai, Marco, Gurioli, Massimo, Bruscaglioni, Piero, Ismaelli, Andrea, and Zaccanti, Giovanni
- Subjects
Optical radar -- Research ,Clouds -- Research ,Scattering (Physics) -- Research ,Astronomy ,Physics - Abstract
The results of lidar measurements on laboratory-scaled cloud models are presented. The lidar system was based on a picosecond laser source and a streak camera. The cloud was simulated by a homogeneous aqueous suspension of calibrated microspheres. Measurements were repeated for different concentrations of diffusers and for different values of the receiver angular field of view. The geometric situation was similar to one of an actual lidar sounding a 300-m-thick cloud at a distance of 1200 or 7800 m. The results show how the effect of multiple scattering depends on the extinction coefficient of the sounded medium and on the geometric parameters. The depolarization introduced by multiple scattering was also investigated. Measurements were carried out in well-controlled conditions. The results can thus be useful to validate the accuracy of numerical or analytical procedures that have been developed to study multiple-scattering contribution in lidar returns. Key words: Lidar, lidar laboratory model, lidar multiple scattering, depolarization.
- Published
- 1996
34. Level 2 processor and auxiliary data for ESA Version 8 final full mission analysis of MIPAS measurements on ENVISAT.
- Author
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Raspollini, Piera, Arnone, Enrico, Barbara, Flavio, Bianchini, Massimo, Carli, Bruno, Ceccherini, Simone, Chipperfield, Martyn P., Dehn, Angelika, Fera, Stefano Della, Dinelli, Bianca Maria, Dudhia, Anu, Flaud, Jean-Marie, Gai, Marco, Kiefer, Michael, López-Puertas, Manuel, Moore, David P., Piro, Alessandro, Remedios, John J., Ridolfi, Marco, and Sembhi, Harjinder
- Subjects
MICHELSON interferometer ,ATMOSPHERIC composition ,NUMBERS of species ,PRODUCT quality ,CLIMATOLOGY - Abstract
High quality long-term data sets of altitude-resolved measurements of the atmospheric composition are important because they can be used both to study the evolution of the atmosphere and as a benchmark for future missions. For the final ESA reprocessing of MIPAS (Michelson Interferometer for Passive Atmospheric Sounding) on ENVISAT (ENViromental SATellite) data, numerous improvements were implemented in the level 2 (L2) processor Optimised Retrieval Model (ORM) version 8.22 (V8) and its auxiliary data. The implemented changes involve all aspects of the processing chain, from the modelling of the measurements with the handling of the horizontal inhomogeneities along the line of sight to the use of the Optimal Estimation for retrieving the minor species, from a more sensitive approach to detect the spectra affected by clouds to a refined method for identifying low quality products. Improvements in the modelling of the measurements were obtained also with an update of the used spectroscopic data and of the databases providing the a priori knowledge of the atmosphere. The HITRAN_mipas_pf4.45 spectroscopic database was finalised with new spectroscopic data verified with MIPAS measurements themselves, while recently measured cross-sections were used for the heavy molecules. The so-called IG2 data set, containing the climatology used by MIPAS L2 processor to generate the initial guess and interfering species profiles when the retrieved profiles from previous scans are not available, was improved taking into account the diurnal variation of the profiles defined using climatologies from both measurements and models. Horizontal gradients were generated using ECMWF ERA-Interim data closest in time and space to the MIPAS data. Further improvements in the L2 V8 products derived from the use of the L1b V8 products, which were upgraded to reduce the instrumental temporal drift and to handle the abrupt changes in the calibration gain. The improvements introduced into the ORM V8 L2 processor and its upgraded auxiliary data, together with the use of the L1b V8 products, lead to the generation of the MIPAS L2 V8 products that are characterised by an increased accuracy, better temporal stability, and a greater number of retrieved species. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
35. CCl4 distribution derived from MIPAS ESA v7 data: Intercomparisons, trend, and lifetime estimation
- Author
-
Valeri, Massimo, Barbara, Flavio, Boone, Chris, Ceccherini, Simone, Gai, Marco, Maucher, Guido, Raspollini, Piera, Ridolfi, Marco, Sgheri, Luca, Wetzel, Gerald, Zoppetti, Nicola, Valeri, Massimo, Barbara, Flavio, Boone, Chri, Ceccherini, Simone, Gai, Marco, Maucher, Guido, Raspollini, Piera, Ridolfi, Marco, Sgheri, Luca, Wetzel, Gerald, and Zoppetti, Nicola
- Subjects
Atmospheric Science - Abstract
Atmospheric emissions of carbon tetrachloride (CCl4) are regulated by the Montreal Protocol due to its role as a strong ozone-depleting substance. The molecule has been the subject of recent increased interest as a consequence of the so-called mystery of CCl4, the discrepancy between atmospheric observations and reported production and consumption. Surface measurements of CCl4 atmospheric concentrations have declined at a rate almost 3 times lower than its lifetime-limited rate, suggesting persistent atmospheric emissions despite the ban. In this paper, we study CCl4 vertical and zonal distributions in the upper troposphere and lower stratosphere (including the photolytic loss region, 70-20hPa), its trend, and its stratospheric lifetime using measurements from the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), which operated onboard the ENVISAT satellite from 2002 to 2012. Specifically, we use the MIPAS data product generated with Version 7 of the Level 2 algorithm operated by the European Space Agency.The CCl4 zonal means show features typical of long-lived species of anthropogenic origin that are destroyed primarily in the stratosphere, with larger quantities in the troposphere and a monotonic decrease with increasing altitude in the stratosphere. MIPAS CCl4 measurements have been compared with independent measurements from other satellite and balloon-borne remote sounders, showing a good agreement between the different datasets.CCl4 trends are calculated as a function of both latitude and altitude. Negative trends of about Ä'10 to Ä'15ÄpptvÄdecadeÄ'1 (Ä'10 to Ä'30Ä%ÄdecadeÄ'1) are found at all latitudes in the upper troposphere-lower stratosphere region, apart from a region in the southern midlatitudes between 50 and 10ÄhPa where the trend is positive with values around 5-10ÄpptvÄdecadeÄ'1 (15-20Ä%ÄdecadeÄ'1). At the lowest altitudes sounded by MIPAS, we find trends consistent with those determined on the basis of long-term ground-based measurements (Ä'10 to Ä'13ÄpptvÄdecadeÄ'1). For higher altitudes, the trend shows a pronounced asymmetry between the Northern and Southern hemispheres, and the magnitude of the decline rate increases with altitude. We use a simplified model assuming tracer-tracer linear correlations to determine CCl4 lifetime in the lower stratosphere. The calculation provides a global average lifetime of 47 (39-61) years, considering CFC-11 as the reference tracer. This value is consistent with the most recent literature result of 44 (36-58) years.
- Published
- 2017
36. Quality assessment of MIPAS ESA V8 products before full mission reprocessing
- Author
-
Raspollini, Piera, Barbara, Flavio, Bianchini, Massimo, Birk, Manfred, Castelli, Elisa, Ceccherini, Simone, Dehn, Angelika, Gai, Marco, Dinelli, Bianca Maria, Dudhia, Anu, Flaud, Jean-Marie, Hoepfner, Michael, Hubert, Daan, Keppens, Arno, Kiefer, Michael, Kleinert, Anne, Moore, David, Papandrea, Enzo, Perron, Gaetan, Piro, Alessandro, Lopez-Puertas, Manuel, Oelhaf, Hermann, Pettinari, Paolo, Remedios, John, Ridolfi, Marco, Sgheri, Luca, Wagner, Georg, Wetzel, Gerald, and Zoppetti, Nicola
- Subjects
MIPAS ,ESA V8 Products ,ENVISAT - Abstract
The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) is a limb-viewing infrared Fourier transform spectrometer that operated from 2002 to 2012 onboard the ENVISAT satellite. The maintenance and the upgrade of both L1 and L2 ESA processors are accomplished by the Quality Working Group, where a fruitful collaboration among Level 1, Level 2 and validation teams can be exploited. Recently both ESA L1 and L2 processors have been updated, as well as the spectroscopic database and some absorption cross-sections. In addition to the products already present in the current release (V7) of ESA MIPAS data (temperature and the VMR of H2O, O3, HNO3, CH4, N2O, NO2, CFC-11, CFC-12, N2O5, ClONO2, HCFC-22, COF2, CF4, HCN and CCl4), the VMR of six additional species (OCS, CH3Cl, HDO, C2H2, C2H6, COCl2) will be provided in V8 dataset. In preparation of V8 full mission reprocessing, three Diagnostic Datasets have been generated to check the performances of all L1, L2 processors and the new auxiliary data. The analysis of these Diagnostic Datasets and the comparison with previous full mission dataset V7 will be used to perform a first assessment of the quality of the new V8 products. In the paper special focus will be given to the new species.
- Published
- 2018
37. Implementation and Validation of a Retrieval Algorithm for Profiling of Water Vapor From Differential Attenuation Measurements at Microwaves
- Author
-
Di Natale, Gianluca, primary, Del Bianco, Samuele, additional, Cortesi, Ugo, additional, Gai, Marco, additional, Macelloni, Giovanni, additional, Montomoli, Francesco, additional, Rovai, Luca, additional, Melani, Samantha, additional, Ortolani, Alberto, additional, Antonini, Andrea, additional, Cuccoli, Fabrizio, additional, Facheris, Luca, additional, and Toccafondi, Alberto, additional
- Published
- 2019
- Full Text
- View/download PDF
38. Advanced Ultraviolet Radiation and Ozone Retrieval for Applications (AURORA): A Project Overview
- Author
-
Cortesi, Ugo, primary, Ceccherini, Simone, additional, Del Bianco, Samuele, additional, Gai, Marco, additional, Tirelli, Cecilia, additional, Zoppetti, Nicola, additional, Barbara, Flavio, additional, Bonazountas, Marc, additional, Argyridis, Argyros, additional, Bós, André, additional, Loenen, Edo, additional, Arola, Antti, additional, Kujanpää, Jukka, additional, Lipponen, Antti, additional, Wandji Nyamsi, William, additional, van der A, Ronald, additional, van Peet, Jacob, additional, Tuinder, Olaf, additional, Farruggia, Vincenzo, additional, Masini, Andrea, additional, Simeone, Emilio, additional, Dragani, Rossana, additional, Keppens, Arno, additional, Lambert, Jean-Christopher, additional, van Roozendael, Michel, additional, Lerot, Christophe, additional, Yu, Huan, additional, and Verberne, Koen, additional
- Published
- 2018
- Full Text
- View/download PDF
39. The Complete Data Fusion for a Full Exploitation of Copernicus Atmospheric Sentinel Level 2 Products.
- Author
-
Zoppetti, Nicola, Ceccherini, Simone, Carli, Bruno, Bianco, Samuele Del, Gai, Marco, Tirelli, Cecilia, Barbara, Flavio, Dragani, Rossana, Arola, Antti, Kujanpää, Jukka, van Peet, Jacob C. A., van der A, Ronald, and Cortesi, Ugo
- Subjects
MULTISENSOR data fusion ,PRODUCT quality ,MANUFACTURED products ,PRODUCT improvement - Abstract
The new platforms for Earth observation from space are characterized by measurements made with great spatial and temporal resolution. While this abundance of information makes it possible to detect and study localized phenomena, on the other hand it may be difficult to manage this large amount of data in the study of global and large scale phenomena. A particularly significant example is the use by assimilation systems of level 2 products that represent gas profiles in the atmosphere. The models on which assimilation systems are based are discretized on spatial grids with horizontal dimensions of the order of tens of kilometres in which tens or hundreds of measurements may fall. A simple procedure to overcome this problem is to extract a subset of the original measurements. However, this procedure involves a loss of information and is therefore justifiable only as a temporary solution. A more refined solution is to resort to the so-called fusion algorithms, capable of compressing the size of the dataset limiting the information loss. A novel data fusion method, the Complete Data Fusion, was recently developed to merge a-posteriori a set of retrieved products in a single one. In the present paper, the Complete Data Fusion method is applied to ozone profile measurements simulated in the thermal infrared and ultraviolet bands, in a realistic scenario, according to the specifications of the Sentinel 4 and 5 missions of the Copernicus programme. Then the fused products are compared with the input profiles; comparisons show that the output products of data fusion have in general smaller errors and higher information contents. The most significant improvement is an increased vertical resolution together with a reduction of the errors. The comparisons of the fused with the fusing products are presented both at single fusion grid-box scale and with a statistical analysis. The grid box size impact was also evaluated, showing that the Complete Data Fusion method can be used with a wide range of grid-box size, the quality of the products improving with larger grid boxes. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
40. Main Theme: Atmosphere The AURORA H2020 project: Advanced Ultraviolet Radiation and Ozone Retrieval for Applications
- Author
-
Cortesi, Ugo, Del Bianco, Samuele, Gai, Marco, Ceccherini, Simone, Bonazountas, Marc, Kalogridis, Stelios, Trypitsidis, Anestis, Bos, Andrè, Zoutman, Erik, Loenen, Edo, Arola, Antti, Kujanpaa, Jukka, Kivi, Rigel, Van der A, Ronald, Van Peet, Jacob, Masini, Andrea, Morelli, Marco, Simeone, Emilio, Dragani, Rossana, Keppens, Arno, Lambert, JeanChristopher, Van Roozendael, Michel, Lerot, Christophe, and Verberne, Koen
- Subjects
Sentinel-4/-5 ,Data Synergy ,Atmospheric ozone ,Copernicus - Abstract
A general overview is provided of the Horizon 2020 project AURORA (Advanced Ultraviolet Radiation and Ozone Retrieval for Applications) funded by the European Union in the frame of the Call Space, EO22015: Stimulating wider research use of Copernicus Sentinel Data. The overarching objective of AURORA is to simulate the provision of synergistic data products for the vertical profile of atmospheric ozone and to assess their quality with respect to the one expected for the operational products of the geostationary (GEO) mission Sentinel 4 and of the Low Earth Orbit (LEO) mission as Sentinel5p and Sentinel5. The project addresses key scientific issues relevant for synergistic exploitation of data acquired in different spectral ranges by different instruments on board the atmospheric Sentinels. A novel approach, based on the assimilation of GEO and LEO fused products by application of an innovative algorithm to S4 and S5 synthetic data, is adopted to assess quality of the unique ozone vertical profile obtained in a context simulating the operational environment. First priority is then attributed to the lower atmosphere with calculation of tropospheric columns and UV surface radiation from the resulting ozone vertical distribution. In parallel, AURORA tackles the technological challenges of creating the infrastructure, exploiting virtual machines and cloud data sharing, to implement the data processing chain, including a geodatabase and webservices for data access. The infrastructure represents a best practice that plays a key role in ensuring wider use of Copernicus Sentinel data for academia, public agencies and industry. It is the basis for a market analysis for premarket applications and uptake in commercial communities. Strategic dissemination and exploitation is targeted to European level (academia, CAMS, GEOSS) and international level (potential synergies and data exchange will be investigated with TEMPO and GEMS, in USA and ASIA). This presentation offers a first introduction to the three years project AURORA (February 1st, 2016 - January 31st, 2019) and describes the scientific, technological and applicationoriented concepts acting as the pillars of the proposed research and development activities. The scope and objectives of the project, the work plan, the expected outcome, as well as the longterm perspectives, are illustrated in some details. In conclusion, the progress status, along with a summary of the results obtained in the preliminary and first phase of the program, is reported. Furthermore, it will be possible to follow the subsequent steps and the dissemination initiatives of AURORA by using the list of references and contact points indicated at the end of the overview.
- Published
- 2016
41. Trend Studies of Ozone Depleting Substances Derived from the new MIPAS ESA V7 Products
- Author
-
Raspollini, Piera, Aubertin, Ginette, Barbara, F., Bernau, M., Birk, Manfred, Carli, Bruno, Carlotti, Massimo, Castelli, E., Ceccherini, Simone, Dehn, Angelika, Gai, Marco, De Laurentis, Marta, Dinelli, Bianca Maria, Dudhia, Anu, Flaud, Jean-Marie, Kiefer, Michael, Moore, D., Perron, Gaetan, López-Puertas, M., Remedios, J., Ridolfi, Marco, Sgheri, L., Wagner, Georg, and Zoppetti, Nicole
- Subjects
detector non-linearity ,ozone depletion ,MIPAS/ENVISAT ,trend studies - Published
- 2016
42. CCl<sub>4</sub> distribution derived from MIPAS ESA v7 data: intercomparisons, trend, and lifetime estimation
- Author
-
Valeri, Massimo, primary, Barbara, Flavio, additional, Boone, Chris, additional, Ceccherini, Simone, additional, Gai, Marco, additional, Maucher, Guido, additional, Raspollini, Piera, additional, Ridolfi, Marco, additional, Sgheri, Luca, additional, Wetzel, Gerald, additional, and Zoppetti, Nicola, additional
- Published
- 2017
- Full Text
- View/download PDF
43. Voltage control in low voltage grids: A comparison between the use of distributed photovoltaic converters or centralized devices
- Author
-
Ciocia, Alessandro, primary, Chicco, Gianfranco, additional, Di Leo, Paolo, additional, Gai, Marco, additional, Mazza, Andrea, additional, Spertino, Filippo, additional, and Hadj-Said, Nouredine, additional
- Published
- 2017
- Full Text
- View/download PDF
44. CCl<sub>4</sub> distribution derived from MIPAS ESA V7 data: validation, trend and lifetime estimation
- Author
-
Valeri, Massimo, primary, Barbara, Flavio, additional, Boone, Chris, additional, Ceccherini, Simone, additional, Gai, Marco, additional, Maucher, Guido, additional, Raspollini, Piera, additional, Ridolfi, Marco, additional, Sgheri, Luca, additional, Wetzel, Gerald, additional, and Zoppetti, Nicola, additional
- Published
- 2017
- Full Text
- View/download PDF
45. Synergy between middle infrared and mm-wave limb sounding of atmospheric temperature and minor constituents in different cloudy scenarios
- Author
-
Cortesi, Ugo (1), Del Bianco, Samuele (1), Ceccherini, Simone (1), Gai, Marco (1), Dinelli, Bianca Maria (2), Castelli, Elisa (2), Oelhaf, Hermann (3), Woiwode, Wolfgang (3), and Gerber, Daniel (4)
- Subjects
Data synergy ,limb-sounding ,UTLS - Abstract
The exploitation of the synergy between infrared and mm-wave limb sounding measurements is one of the key strength of the scientific payload proposed for the PREMIER mission candidate to the Core Missions of ESA Earth Explorer 7. As part of the preparatory activities of PREMIER, the PremierEx campaign was conducted in the Arctic region (Kiruna, Sweden) with the high altitude research aircraft M-55 Geophysica in March 2010. In this work, we discuss the synergistic use of MARSCHALS and MIPAS-STR data acquired during the Premier Ex scientific flight conducted on March 10, 2010 by using an innovative approach to the problem of atmospheric data fusion. We compare the quality of synergistic and individual retrieval products and present our conclusions on the potential of combined exploitation of the information associated to infrared and mm-wave limb observations of the UTLS. The cloud coverage (low clouds in the first part, no clouds in the central part and high tropospheric clouds at the end) observed along the flight provided representative test cases to evaluate the synergy in three different cloudy scenarios.
- Published
- 2015
46. The Relationship Between the Backscattering Coefficient and the Biomass of Narrow and Broad Leaf Crops
- Author
-
Macelloni, Giovanni, Paloscia, Simonetta, Pampaloni, Paolo, Marliani, Filippo, and Gai, Marco
- Subjects
Earth sciences -- Remote sensing ,Backscattering -- Measurement ,Foliage plants -- Measurement ,Biomass -- Measurement ,Synthetic aperture radar -- Measurement ,Business ,Earth sciences ,Electronics and electrical industries - Abstract
The influence of the shape and dimensions of plant constituents on the backscattering of agricultural vegetation is investigated. Multifrequency multitemporal polarimetric data, collected at C- and L-bands by means of airborne and satellite synthetic aperture radar (SAR), showed that the relations between the backscattering of crops and the vegetation biomass depend on plant type, and that there are different trends for 'narrow' and 'broad' leaf crops. In the latter crops, backscattering increases with an increase in the biomass, especially at L-band. This behavior is typical of media in which scattering is dominant, whereas on 'narrow leaf' plants, the trend is flat or decreasing, denoting a major contribution of absorption. Theoretical simulations obtained with a discrete element radiative transfer model have confirmed that a different backscattering of crops with the same biomass may be due to plant geometry. Index Terms--Backscattering model, crop biomass, synthetic aperture radar (SAR).
- Published
- 2001
47. Synergy between middle infrared and millimeter-wave limb sounding of atmospheric temperature and minor constituents
- Author
-
Cortesi, Ugo, primary, Del Bianco, Samuele, additional, Ceccherini, Simone, additional, Gai, Marco, additional, Dinelli, Bianca Maria, additional, Castelli, Elisa, additional, Oelhaf, Hermann, additional, Woiwode, Wolfgang, additional, Höpfner, Michael, additional, and Gerber, Daniel, additional
- Published
- 2016
- Full Text
- View/download PDF
48. CCl4 distribution derived from MIPAS ESA V7 data: validation, trend and lifetime estimation.
- Author
-
Valeri, Massimo, Barbara, Flavio, Boone, Chris, Ceccherini, Simone, Gai, Marco, Maucher, Guido, Raspollini, Piera, Ridolfi, Marco, Sgheri, Luca, Wetzel, Gerald, and Zoppetti, Nicola
- Abstract
Atmospheric emissions of Carbon tetrachloride CCl
4 are regulated by the Montreal Protocol due to its role as a strong ozone-depleting substance. The molecule has been the subject of recent increased interest as a consequence of the so called ''mystery of CCl4 ,'' the discrepancy between atmospheric observations and reported production and consumption. Surface measurements of CCl4 atmospheric concentrations have declined at a rate almost three times smaller than its lifetime-limited rate, suggesting persistent atmospheric emissions despite the ban. In this paper, we study CCl4 vertical and zonal distributions in the upper troposphere and lower stratosphere (including the photolytic loss region, 70-20 hPa), its trend, and its stratospheric lifetime using measurements from the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), which operated onboard the ENVISAT satellite from 2002 to 2012. Specifically, we use the MIPAS data product generated with Version 7 of the Level 2 algorithm operated by the European Space Agency. The CCl4 zonal means show features typical of long-lived species of anthropogenic origin that are destroyed primarily in the stratosphere, with larger quantities in the troposphere and a monotonic decrease with increasing altitude in the stratosphere. In the troposphere, the largest concentrations are observed at the latitudes of major industrial countries (20/50°N). The good agreement we find between MIPAS CCl4 and independent measurements from other satellite and balloon-borne remote sounders proves the reliability of the MIPAS dataset. CCl4 trends are calculated as a function of both latitude and altitude. Negative trends are found at all latitudes in the upper-troposphere/lower-stratosphere region, apart from a region in the Southern mid-latitudes between 50 and 10 hPa where the trend is positive. At the lowest altitudes sounded by MIPAS, we find trends consistent with those determined on the basis of long-term ground-based measurements. For higher altitudes, the trend shows a pronounced asymmetry between Northern and Southern Hemispheres, and the magnitude of the decline rate increases with altitude. At 50 hPa the decline is about 30-35 %/decade, close to the lifetime-limited trend. We use a simplified model assuming tracer-tracer linear correlations to determine CCl4 lifetime in the lower stratosphere. The calculation provides a global average lifetime of 46(38-60) years considering CFC-11 as the reference tracer. This value is consistent with the most recent literature result of 44(36-58) years. [ABSTRACT FROM AUTHOR]- Published
- 2017
- Full Text
- View/download PDF
49. Algorithm for retrieval of snow mass from Ku- and X-band radar backscatter measurements
- Author
-
Rott, Helmut, primary, Nagler, Thomas, additional, Voglmeier, Karl, additional, Kern, Michael, additional, Macelloni, Giovanni, additional, Gai, Marco, additional, Cortesi, Ugo, additional, Scheiber, Rolf, additional, Hajnsek, Irena, additional, Pulliainen, Jouni, additional, and Flach, Dominic, additional
- Published
- 2012
- Full Text
- View/download PDF
50. Application of KLIMA/G-POD algorithm to CO2 retrieval from IASI/METOP-A observations and comparison with GOSAT/TANSO-FTS products
- Author
-
Laurenza, Lucia Maria, primary, Cortesi, Ugo, additional, Del Bianco, Samuele, additional, and Gai, Marco, additional
- Published
- 2012
- Full Text
- View/download PDF
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