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5 results on '"J. Bosenberg"'

1. THE VERTICAL DISTRIBUTION OF AEROSOL OVER EUROPE-SYNTHESISOF ONE YEAR OF EARLINET AEROSOL LIDAR MEASUREMENTS AND AEROSOL TRANSPORT MODELING WITH LMDZ-INCA

Author

S. GUIBERT, V. MATTHIAS, M. SCHULZ, J. BOSENBERG, R. EIXMANN, I. MATTIS, G. PAPPALARDO, N. SPINELLI, G. VAUGHAN, PERRONE, Maria Rita, S., Guibert, V., Matthia, M., Schulz, J., Bosenberg, R., Eixmann, I., Matti, G., Pappalardo, Perrone, Maria Rita, N., Spinelli, and G., Vaughan

Subjects
aerosol, EARLINET, lidar
Abstract

Aerosol extinction vertical profiles measured with Raman lidar in the framework of EARLINET in 2000 are compared to profiles modeled bya general circulation model, LMDzT-INCA, at seven stations in Europe. Comparisons based on individual profiles show moderate correlation between model and data. Averaging aerosol extinction values on larger temporal or spatial scales improves the comparison. Furthermore, we show that the model succeeds to reproduce the mean annual aerosol distribution over Europe. Comparisons of the aerosol vertical distribution in two distinct regions of Europe are presented. For the northern stations, the observed yearly average aerosol extinction coefficient vertical profile and the modeled one show an average bias of 22%. For the southern stations the mean bias is slightlyhigher (29%). Both model and lidar show different extinction profiles in different parts of Europe, with higher values in upper heights in the South. According to modeled profiles of each aerosol component, this is caused bythe presence of dust at altitudes between 2 and 6 km. In addition vertical mixing in the South seems to be more effective for the other aerosol components.

Published
2005

2. Aerosol lidar intercomparison in the framework of the EARLINET project 2 Aerosol backscatter algorithms

Author

C. BOKMANN, U. WANDINGER, A. ANSMANN, V. FREUDENTALER, J. BOSENBERG, V. AMIRIDIS, A. BOSELLI, A. DELAVAL, M. FRIOUD, I. V. GRIGOROV, A. HAGARD, M. HORVAT, M. IARLORI, L. KOMGUEN, S. KREIPL, G. LARCHEVEQUE, V. MATTHIAS, A. PAPAYANNIS, G. PAPPALARDO, F. ROCADENBOSCH, J. A. RODRIGUES, J. SCHNEIDER, V. SHCHERBACOV, M. WIEGNER, DE TOMASI, Ferdinando, Institut für Mathematik [Potsdam], University of Potsdam = Universität Potsdam, Leibniz Institute for Tropospheric Research (TROPOS), Max-Planck-Institut für Meteorologie (MPI-M), Max-Planck-Gesellschaft, Istituto di Metodologie per l'Analisi Ambientale (IMAA), Consiglio Nazionale delle Ricerche [Potenza] (CNR), CETEMPS, Dipartimento di Scienze Fisiche e Chimiche [L'Aquila], Università degli Studi dell'Aquila = University of L'Aquila (UNIVAQ)-Università degli Studi dell'Aquila = University of L'Aquila (UNIVAQ), Department of Physics [Aberystwyth], Aberystwyth University, Laser Remote Sensing Laboratory, National Technical University of Athens [Athens] (NTUA), Remote Sensing Laboratory [Barcelona] (RSLab), Universitat Politècnica de Catalunya [Barcelona] (UPC), Departamento de Química, Faculdade de Ciências da Universidade do Porto (FCUP), Universidade do Porto = University of Porto-Universidade do Porto = University of Porto, Laboratoire des champs magnétiques intenses (LCMI-GHMFL), Centre National de la Recherche Scientifique (CNRS), Laboratoire de Météorologie Physique (LaMP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Ludwig-Maximilians-Universität München (LMU), Universität Potsdam, Università degli Studi dell'Aquila (UNIVAQ)-Università degli Studi dell'Aquila (UNIVAQ), Universidade do Porto-Universidade do Porto, Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció, C., Bokmann, U., Wandinger, A., Ansmann, V., Freudentaler, J., Bosenberg, V., Amiridi, A., Boselli, A., Delaval, DE TOMASI, Ferdinando, M., Frioud, I. V., Grigorov, A., Hagard, M., Horvat, M., Iarlori, L., Komguen, S., Kreipl, G., Larcheveque, V., Matthia, A., Papayanni, G., Pappalardo, F., Rocadenbosch, J. A., Rodrigue, J., Schneider, V., Shcherbacov, and M., Wiegner

Subjects
Teledetecció, 010504 meteorology & atmospheric sciences, Backscatter, Meteorology, aerosol, Materials Science (miscellaneous), Field of view, RAMAN LIDAR, 01 natural sciences, Industrial and Manufacturing Engineering, Aerosol backscatter, 010309 optics, Troposphere, 0103 physical sciences, INVERSION, Business and International Management, lidar, Laser beams, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Remote sensing, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, algorithm, EARLINET, Institut für Mathematik, Inversion (meteorology), ATMOSPHERE, EXTINCTION PROFILES, Aerosol, Lidar, Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció [Àrees temàtiques de la UPC], Environmental science, Algorithm
Abstract

An intercomparison of aerosol backscatter lidar algorithms was performed in 2001 within the framework of the European Aerosol Research Lidar Network to Establish an Aerosol Climatology (EARLINET). The objective of this research was to test the correctness of the algorithms and the influence of the lidar ratio used by the various lidar teams involved in the EARLINET for calculation of backscatter-coefficient profiles from the lidar signals. The exercise consisted of processing synthetic lidar signals of various degrees of difficulty. One of these profiles contained height- dependent lidar ratios to test the vertical influence of those profiles on the various retrieval algorithms. Furthermore, a realistic incomplete overlap of laser beam and receiver field of view was introduced to remind the teams to take great care in the nearest range to the lidar. The intercomparison was performed in three stages with increasing knowledge on the input parameters. First, only the lidar signals were distributed; this is the most realistic stage. Afterward the lidar ratio profiles and the reference values at calibration height were provided. The unknown height- dependent lidar ratio had the largest influence on the retrieval, whereas the unknown reference value was of minor importance. These results show the necessity of making additional independent measurements, which can provide us with a suitable approximation of the lidar ratio. The final stage proves in general, that the data evaluation schemes of the different groups of lidar systems work well. (C) 2004 Optical Society of America

Published
2004

3. Vertical aerosol distribution over Europe: statisical analysis of Raman lidar data from 10 European Aerosol Reseearch Lidar Network (EARLINET) stations

Author

Alexandros Papayannis, Dimitris Balis, Jens Bösenberg, Volker Matthias, Gelsomina Pappalardo, R. Eixmann, Marco Iarlori, Xuan Wang, L. Komguem, Ina Mattis, Maria Rita Perrone, V., Matthia, D., Bali, J., Bosenberg, R., Eixmann, M., Iarlori, L., Komguem, I., Matti, A., Papayanni, G., Pappalardo, Perrone, Maria Rita, and X., Wang

Subjects
Atmospheric Science, Meteorology, Planetary boundary layer, aerosol, Soil Science, Aquatic Science, Oceanography, Troposphere, Altitude, atmospheric composition, Geochemistry and Petrology, Earth and Planetary Sciences (miscellaneous), Aerosol, Earth-Surface Processes, Water Science and Technology, Lidar, Ecology, EARLINET, Paleontology, Forestry, atmospheric aerosol, Albedo, Geophysics, Statistical analysis, Space and Planetary Science, Extinction (optical mineralogy), Raman lidar, Environmental science, Frequency distribution
Abstract

[1] Since 2000, regular lidar observations of the vertical aerosol distribution over Europe have been performed within the framework of EARLINET, the European Aerosol Research Lidar Network. A statistical analysis concerning the vertical distribution of the volume light extinction coefficients of particles derived from Raman lidar measurements at 10 EARLINET stations is presented here. The profiles were measured on a fixed schedule with up to two measurements per week; they typically covered the height range from 500 m to 6000 m above ground level (agl). The analysis is made for the planetary boundary layer (PBL) as well as for several fixed layers above ground. The results show typical values of the aerosol extinction coefficient and the aerosol optical depth (AOD) in different parts of Europe, with highest values in southeastern Europe and lowest values in the northwestern part. Annual cycles and cumulative frequency distributions are also presented. We found that higher aerosol optical depths in southern Europe compared to the northern part are mainly attributed to larger amounts of aerosol in higher altitudes. At 9 of the 10 sites the frequency distribution of the aerosol optical depth in the planetary boundary layer follows a lognormal distribution at the 95% significance level.

Published
2004

4. A European aerosol research lidar network to establish an aerosol climatology (EARLINET)

Author

Jacques Pelon, Volker Freudenthaler, Jens Bösenberg, Nicola Spinelli, Alexandros Papayannis, Anatoli Chaikovsky, Johannes Schneider, A. Hagard, P. Flamant, G. Visconti, Adolfo Comerón, Thomas Trickl, Bertrand Calpini, Gelsomina Pappalardo, Maria Rita Perrone, Christine Böckmann, Geraint Vaughan, D. P. Resendes, Valentin Mitev, Ina Mattis, Dimitrios Balis, J., Schneider, D., Bali, C., Bockmann, J., Bosemberg, B., Calpini, A. P., Chaikovsky, A., Cameron, P., Flamant, V., Freudenthaler, A., Hagard, I., Matti, Perrone, Maria Rita, A., Papayanni, G., Pappalardo, J., Pelon, M. R., Perrone, D. P., Resende, N., Spinelli, T., Trickl, G., Vaughan, G., Visconti, J., Bosenberg, A., Comeron, V., Mitev, Spinelli, Nicola, AND G., Visconti, Leibniz-Institut für Atmosphärenphysik (IAP), Universität Rostock-Leibniz Association, Laboratory of Atmospheric Physics [Thessaloniki], Aristotle University of Thessaloniki, Institut für Mathematik [Potsdam], Universität Potsdam, Max-Planck-Institut für Meteorologie (MPI-M), Max-Planck-Gesellschaft, Ecole Polytechnique Fédérale de Lausanne (EPFL), B. I. Stepanov Institute of Physics [Minsk], National Academy of Sciences of Belarus (NASB), Universitat Politècnica de Catalunya [Barcelona] (UPC), Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École des Ponts ParisTech (ENPC)-École polytechnique (X)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Meteorologisches Institut München (MIM), Ludwig-Maximilians-Universität München (LMU), Swedish Defense Research Agency (FOI), Leibniz Institute for Tropospheric Research (TROPOS), Observatoire Cantonal de Neuchâtel (OCN), National Technical University of Athens [Athens] (NTUA), Istituto di Metodologie per l'Analisi Ambientale (IMAA), Consiglio Nazionale delle Ricerche [Potenza] (CNR), Service d'aéronomie (SA), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Istituto Nazionale per la Fisica della Materia (INFM), Università del Salento [Lecce], Instituto Superior Técnico, Universidade Técnica de Lisboa (IST), Dipartimento di Scienze Fisiche [Naples], Università degli studi di Napoli Federico II, Fraunhofer-Institut für Atmosphärische Umweltforschung, Department of Physics [Aberystwyth], Aberystwyth University, Dipartimento di Fisica [L'Aquila], Università degli Studi dell'Aquila (UNIVAQ), Publica, University of Potsdam = Universität Potsdam, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), University of Naples Federico II = Università degli studi di Napoli Federico II, and Università degli Studi dell'Aquila = University of L'Aquila (UNIVAQ)

Subjects
optical properties, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Fluid Flow and Transfer Processes, Atmospheric Science, Environmental Engineering, 010504 meteorology & atmospheric sciences, Meteorology, Mechanical Engineering, 01 natural sciences, Pollution, Aerosol, 010309 optics, remote sensing, Lidar, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, Remote sensing (archaeology), 0103 physical sciences, Environmental science, aerosol climatology, ComputingMilieux_MISCELLANEOUS, lidar, 0105 earth and related environmental sciences, Remote sensing
Abstract

International audience

Published
2000

5. Aerosol lidar intercomparison in the framework of the EARLINET project 1 Instruments

Author

A. Hagard, I. Balin, A. Delaval, V. Matthais, Giorgos Chourdakis, Anatoli Chaikovsky, Adolfo Comerón, R. Eixmann, Dimitris Balis, Renaud Matthey, S. Kreipl, Volker Freudenthaler, J. A. Rodrigues, Xuan Wang, Vincenzo Rizi, L. Komguem, Aldo Amodeo, F. De Tomasi, Ulla Wandinger, Jens Bösenberg, V., Matthia, V., Freudentaler, A., Amodeo, I., Balin, D., Bali, J., Bosenberg, A., Chaikovsky, G., Chourdaki, A., Comeron, A., Delaval, DE TOMASI, Ferdinando, R., Eixmann, A., Hagard, L., Komguen, S., Kreipl, R., Matthey, V., Rizi, J. A., Rodrigue, U., Wandinger, and X., Wang

Subjects
Backscatter, Meteorology, aerosol, Planetary boundary layer, EARLINET, STRATOSPHERIC OZONE, Materials Science (miscellaneous), Raman lidar, BACKSCATTERING, RAMAN LIDAR, Industrial and Manufacturing Engineering, Aerosol, EXTINCTION, Lidar, WATER-VAPOR, ITER, Ozone layer, Environmental science, Business and International Management, lidar, Water vapor, Atmospheric optics, Remote sensing
Abstract

In the framework of the European Aerosol Research Lidar Network to Establish an Aerosol Climatology (EARLINET), 19 aerosol lidar systems from 11 European countries were compared. Aerosol extinction or backscatter coefficient profiles were measured by at least two systems for each comparison. Aerosol extinction coefficients were derived from Raman lidar measurements in the UV (351 or 355 nm), and aerosol backscatter profiles were calculated from pure elastic backscatter measurements at 351 or 355, 532, or 1064 nm. The results were compared for height ranges with high and low aerosol content. Some systems were additionally compared with sunphotometers and starphotometers. Predefined maximum deviations were used for quality control of the results. Lidar systems with results outside those limits could not meet the quality assurance criterion. The algorithms for deriving aerosol backscatter profiles from elastic lidar measurements were tested separately, and the results are described in Part 2 of this series of papers [Appl. Opt.43, 977–989 (2004)]. In the end, all systems were quality assured, although some had to be modified to improve their performance. Typical deviations between aerosol backscatter profiles were 10% in the planetary boundary layer and 0.1 × 10-6 m-1 sr-1 in the free troposphere.

Published
2004

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