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5 results on '"Mohamad, Maznorizan"'

1. Ozonesonde Quality Assurance: The JOSIE–SHADOZ (2017) Experience

Author

Thompson, Anne M., Smit, Herman G. J., Witte, Jacquelyn C., Stauffer, Ryan M., Johnson, Bryan J., Morris, Gary, von der Gathen, Peter, Van Malderen, Roeland, Davies, Jonathan, Piters, Ankie, Allaart, Marc, Posny, Françoise, Kivi, Rigel, Cullis, Patrick, Hoang Anh, Nguyen Thi, Corrales, Ernesto, Machinini, Tshidi, da Silva, Francisco R., Paiman, George, Thiong’o, Kennedy, Zainal, Zamuna, Brothers, George B., Wolff, Katherine R., Nakano, Tatsumi, Stübi, Rene, Romanens, Gonzague, Coetzee, Gert J. R., Diaz, Jorge A., Mitro, Sukarni, Mohamad, Maznorizan, Ogino, Shin-Ya, Thompson, Anne M., Smit, Herman G. J., Witte, Jacquelyn C., Stauffer, Ryan M., Johnson, Bryan J., Morris, Gary, von der Gathen, Peter, Van Malderen, Roeland, Davies, Jonathan, Piters, Ankie, Allaart, Marc, Posny, Françoise, Kivi, Rigel, Cullis, Patrick, Hoang Anh, Nguyen Thi, Corrales, Ernesto, Machinini, Tshidi, da Silva, Francisco R., Paiman, George, Thiong’o, Kennedy, Zainal, Zamuna, Brothers, George B., Wolff, Katherine R., Nakano, Tatsumi, Stübi, Rene, Romanens, Gonzague, Coetzee, Gert J. R., Diaz, Jorge A., Mitro, Sukarni, Mohamad, Maznorizan, and Ogino, Shin-Ya

Abstract

The ozonesonde is a small balloon-borne instrument that is attached to a standard radiosonde to measure profiles of ozone from the surface to 35 km with ∼100-m vertical resolution. Ozonesonde data constitute a mainstay of satellite calibration and are used for climatologies and analysis of trends, especially in the lower stratosphere where satellites are most uncertain. The electrochemical concentration cell (ECC) ozonesonde has been deployed at ∼100 stations worldwide since the 1960s, with changes over time in manufacture and procedures, including details of the cell chemical solution and data processing. As a consequence, there are biases among different stations and discontinuities in profile time series from individual site records. For 22 years the Jülich (Germany) Ozonesonde Intercomparison Experiment (JOSIE) has periodically tested ozonesondes in a simulation chamber designated the World Calibration Centre for Ozonesondes (WCCOS) by WMO. During October–November 2017 a JOSIE campaign evaluated the sondes and procedures used in Southern Hemisphere Additional Ozonesondes (SHADOZ), a 14-station sonde network operating in the tropics and subtropics. A distinctive feature of the 2017 JOSIE was that the tests were conducted by operators from eight SHADOZ stations. Experimental protocols for the SHADOZ sonde configurations, which represent most of those in use today, are described, along with preliminary results. SHADOZ stations that follow WMO-recommended protocols record total ozone within 3% of the JOSIE reference instrument. These results and prior JOSIEs demonstrate that regular testing is essential to maintain best practices in ozonesonde operations and to ensure high-quality data for the satellite and ozone assessment communities.

Published
2019

2. Ozonesonde Quality Assurance: The JOSIE–SHADOZ (2017) Experience

Author

Thompson, Anne M., Smit, Herman G. J., Witte, Jacquelyn C., Stauffer, Ryan M., Johnson, Bryan J., Morris, Gary, von der Gathen, Peter, Van Malderen, Roeland, Davies, Jonathan, Piters, Ankie, Allaart, Marc, Posny, Françoise, Kivi, Rigel, Cullis, Patrick, Hoang Anh, Nguyen Thi, Corrales, Ernesto, Machinini, Tshidi, da Silva, Francisco R., Paiman, George, Thiong’o, Kennedy, Zainal, Zamuna, Brothers, George B., Wolff, Katherine R., Nakano, Tatsumi, Stübi, Rene, Romanens, Gonzague, Coetzee, Gert J. R., Diaz, Jorge A., Mitro, Sukarni, Mohamad, Maznorizan, Ogino, Shin-Ya, Thompson, Anne M., Smit, Herman G. J., Witte, Jacquelyn C., Stauffer, Ryan M., Johnson, Bryan J., Morris, Gary, von der Gathen, Peter, Van Malderen, Roeland, Davies, Jonathan, Piters, Ankie, Allaart, Marc, Posny, Françoise, Kivi, Rigel, Cullis, Patrick, Hoang Anh, Nguyen Thi, Corrales, Ernesto, Machinini, Tshidi, da Silva, Francisco R., Paiman, George, Thiong’o, Kennedy, Zainal, Zamuna, Brothers, George B., Wolff, Katherine R., Nakano, Tatsumi, Stübi, Rene, Romanens, Gonzague, Coetzee, Gert J. R., Diaz, Jorge A., Mitro, Sukarni, Mohamad, Maznorizan, and Ogino, Shin-Ya

Abstract

The ozonesonde is a small balloon-borne instrument that is attached to a standard radiosonde to measure profiles of ozone from the surface to 35 km with ∼100-m vertical resolution. Ozonesonde data constitute a mainstay of satellite calibration and are used for climatologies and analysis of trends, especially in the lower stratosphere where satellites are most uncertain. The electrochemical concentration cell (ECC) ozonesonde has been deployed at ∼100 stations worldwide since the 1960s, with changes over time in manufacture and procedures, including details of the cell chemical solution and data processing. As a consequence, there are biases among different stations and discontinuities in profile time series from individual site records. For 22 years the Jülich (Germany) Ozonesonde Intercomparison Experiment (JOSIE) has periodically tested ozonesondes in a simulation chamber designated the World Calibration Centre for Ozonesondes (WCCOS) by WMO. During October–November 2017 a JOSIE campaign evaluated the sondes and procedures used in Southern Hemisphere Additional Ozonesondes (SHADOZ), a 14-station sonde network operating in the tropics and subtropics. A distinctive feature of the 2017 JOSIE was that the tests were conducted by operators from eight SHADOZ stations. Experimental protocols for the SHADOZ sonde configurations, which represent most of those in use today, are described, along with preliminary results. SHADOZ stations that follow WMO-recommended protocols record total ozone within 3% of the JOSIE reference instrument. These results and prior JOSIEs demonstrate that regular testing is essential to maintain best practices in ozonesonde operations and to ensure high-quality data for the satellite and ozone assessment communities.

Published
2019

3. Tropospheric Ozone Assessment Report: database and metrics data of global surface ozone observations

Author

Schultz, Martin G., Schröder, Sabine, Lyapina, Olga, Cooper, Owen R., Galbally, Ian, Petropavlovskikh, Irina, von Schneidemesser, Erika, Tanimoto, Hiroshi, Elshorbany, Yasin, Naja, Manish, Seguel, Rodrigo J., Dauert, Ute, Eckhardt, Paul, Feigenspahn, Stefan, Fiebig, Markus, Hjellbrekke, Anne-Gunn, Hong, You-Deog, Christian Kjeld, Peter, Koide, Hiroshi, Lear, Gary, Tarasick, David, Ueno, Mikio, Wallasch, Markus, Baumgardner, Darrel, Chuang, Ming-Tung, Gillett, Robert, Lee, Meehye, Molloy, Suzie, Moolla, Raeesa, Wang, Tao, Sharps, Katrina, Adame, Jose A., Ancellet, Gerard, Apadula, Francesco, Artaxo, Paulo, Barlasina, Maria E., Bogucka, Magdalena, Bonasoni, Paolo, Chang, Limseok, Colomb, Aurelie, Cuevas-Agulló, Emilio, Cupeiro, Manuel, Degorska, Anna, Ding, Aijun, Fröhlich, Marina, Frolova, Marina, Gadhavi, Harish, Gheusi, Francois, Gilge, Stefan, Gonzalez, Margarita Y., Gros, Valerie, Hamad, Samera H., Helmig, Detlev, Henriques, Diamantino, Hermansen, Ove, Holla, Robert, Hueber, Jacques, Im, Ulas, Jaffe, Daniel A., Komala, Ninong, Kubistin, Dagmar, Lam, Ka-Se, Laurila, Tuomas, Lee, Haeyoung, Levy, Ilan, Mazzoleni, Claudio, Mazzoleni, Lynn, McClure-Begley, Audra, Mohamad, Maznorizan, Murovic, Marijana, Navarro-Comas, Monica, Nicodim, Florin, Parrish, David, Read, Katie A., Reid, Nick, Ries, Ludwig, Saxena, Pallavi, Schwab, James J., Scorgie, Yvonne, Senik, Irina, Simmonds, Peter, Sinha, Vinayak, Skorokhod, Andrey I., Spain, Gerard, Spangl, Wolfgang, Spoor, Ronald, Springston, Stephen R., Steer, Kelvyn, Steinbacher, Martin, Suharguniyawan, Eka, Torre, Paul, Trickl, Thomas, Weili, Lin, Weller, Rolf, Xiaobin, Xu, Xue, Likun, Zhiqiang, Ma, Schultz, Martin G., Schröder, Sabine, Lyapina, Olga, Cooper, Owen R., Galbally, Ian, Petropavlovskikh, Irina, von Schneidemesser, Erika, Tanimoto, Hiroshi, Elshorbany, Yasin, Naja, Manish, Seguel, Rodrigo J., Dauert, Ute, Eckhardt, Paul, Feigenspahn, Stefan, Fiebig, Markus, Hjellbrekke, Anne-Gunn, Hong, You-Deog, Christian Kjeld, Peter, Koide, Hiroshi, Lear, Gary, Tarasick, David, Ueno, Mikio, Wallasch, Markus, Baumgardner, Darrel, Chuang, Ming-Tung, Gillett, Robert, Lee, Meehye, Molloy, Suzie, Moolla, Raeesa, Wang, Tao, Sharps, Katrina, Adame, Jose A., Ancellet, Gerard, Apadula, Francesco, Artaxo, Paulo, Barlasina, Maria E., Bogucka, Magdalena, Bonasoni, Paolo, Chang, Limseok, Colomb, Aurelie, Cuevas-Agulló, Emilio, Cupeiro, Manuel, Degorska, Anna, Ding, Aijun, Fröhlich, Marina, Frolova, Marina, Gadhavi, Harish, Gheusi, Francois, Gilge, Stefan, Gonzalez, Margarita Y., Gros, Valerie, Hamad, Samera H., Helmig, Detlev, Henriques, Diamantino, Hermansen, Ove, Holla, Robert, Hueber, Jacques, Im, Ulas, Jaffe, Daniel A., Komala, Ninong, Kubistin, Dagmar, Lam, Ka-Se, Laurila, Tuomas, Lee, Haeyoung, Levy, Ilan, Mazzoleni, Claudio, Mazzoleni, Lynn, McClure-Begley, Audra, Mohamad, Maznorizan, Murovic, Marijana, Navarro-Comas, Monica, Nicodim, Florin, Parrish, David, Read, Katie A., Reid, Nick, Ries, Ludwig, Saxena, Pallavi, Schwab, James J., Scorgie, Yvonne, Senik, Irina, Simmonds, Peter, Sinha, Vinayak, Skorokhod, Andrey I., Spain, Gerard, Spangl, Wolfgang, Spoor, Ronald, Springston, Stephen R., Steer, Kelvyn, Steinbacher, Martin, Suharguniyawan, Eka, Torre, Paul, Trickl, Thomas, Weili, Lin, Weller, Rolf, Xiaobin, Xu, Xue, Likun, and Zhiqiang, Ma

Abstract

In support of the first Tropospheric Ozone Assessment Report (TOAR) a relational database of global surface ozone observations has been developed and populated with hourly measurement data and enhanced metadata. A comprehensive suite of ozone data products including standard statistics, health and vegetation impact metrics, and trend information, are made available through a common data portal and a web interface. These data form the basis of the TOAR analyses focusing on human health, vegetation, and climate relevant ozone issues, which are part of this special feature. Cooperation among many data centers and individual researchers worldwide made it possible to build the world's largest collection of in-situ hourly surface ozone data covering the period from 1970 to 2015. By combining the data from almost 10,000 measurement sites around the world with global metadata information, new analyses of surface ozone have become possible, such as the first globally consistent characterisations of measurement sites as either urban or rural/remote. Exploitation of these global metadata allows for new insights into the global distribution, and seasonal and long-term changes of tropospheric ozone and they enable TOAR to perform the first, globally consistent analysis of present-day ozone concentrations and recent ozone changes with relevance to health, agriculture, and climate. Considerable effort was made to harmonize and synthesize data formats and metadata information from various networks and individual data submissions. Extensive quality control was applied to identify questionable and erroneous data, including changes in apparent instrument offsets or calibrations. Such data were excluded from TOAR data products. Limitations of a posteriori data quality assurance are discussed. As a result of the work presented here, global coverage of surface ozone data for scientific analysis has been significantly extended. Yet, large gaps remain in the surface observation network bot

Published
2017

4. Tropospheric Ozone Assessment Report: database and metrics data of global surface ozone observations

Author

Schultz, Martin G., Schröder, Sabine, Lyapina, Olga, Cooper, Owen R., Galbally, Ian, Petropavlovskikh, Irina, von Schneidemesser, Erika, Tanimoto, Hiroshi, Elshorbany, Yasin, Naja, Manish, Seguel, Rodrigo J., Dauert, Ute, Eckhardt, Paul, Feigenspahn, Stefan, Fiebig, Markus, Hjellbrekke, Anne-Gunn, Hong, You-Deog, Christian Kjeld, Peter, Koide, Hiroshi, Lear, Gary, Tarasick, David, Ueno, Mikio, Wallasch, Markus, Baumgardner, Darrel, Chuang, Ming-Tung, Gillett, Robert, Lee, Meehye, Molloy, Suzie, Moolla, Raeesa, Wang, Tao, Sharps, Katrina, Adame, Jose A., Ancellet, Gerard, Apadula, Francesco, Artaxo, Paulo, Barlasina, Maria E., Bogucka, Magdalena, Bonasoni, Paolo, Chang, Limseok, Colomb, Aurelie, Cuevas-Agulló, Emilio, Cupeiro, Manuel, Degorska, Anna, Ding, Aijun, Fröhlich, Marina, Frolova, Marina, Gadhavi, Harish, Gheusi, Francois, Gilge, Stefan, Gonzalez, Margarita Y., Gros, Valerie, Hamad, Samera H., Helmig, Detlev, Henriques, Diamantino, Hermansen, Ove, Holla, Robert, Hueber, Jacques, Im, Ulas, Jaffe, Daniel A., Komala, Ninong, Kubistin, Dagmar, Lam, Ka-Se, Laurila, Tuomas, Lee, Haeyoung, Levy, Ilan, Mazzoleni, Claudio, Mazzoleni, Lynn, McClure-Begley, Audra, Mohamad, Maznorizan, Murovic, Marijana, Navarro-Comas, Monica, Nicodim, Florin, Parrish, David, Read, Katie A., Reid, Nick, Ries, Ludwig, Saxena, Pallavi, Schwab, James J., Scorgie, Yvonne, Senik, Irina, Simmonds, Peter, Sinha, Vinayak, Skorokhod, Andrey I., Spain, Gerard, Spangl, Wolfgang, Spoor, Ronald, Springston, Stephen R., Steer, Kelvyn, Steinbacher, Martin, Suharguniyawan, Eka, Torre, Paul, Trickl, Thomas, Weili, Lin, Weller, Rolf, Xiaobin, Xu, Xue, Likun, Zhiqiang, Ma, Schultz, Martin G., Schröder, Sabine, Lyapina, Olga, Cooper, Owen R., Galbally, Ian, Petropavlovskikh, Irina, von Schneidemesser, Erika, Tanimoto, Hiroshi, Elshorbany, Yasin, Naja, Manish, Seguel, Rodrigo J., Dauert, Ute, Eckhardt, Paul, Feigenspahn, Stefan, Fiebig, Markus, Hjellbrekke, Anne-Gunn, Hong, You-Deog, Christian Kjeld, Peter, Koide, Hiroshi, Lear, Gary, Tarasick, David, Ueno, Mikio, Wallasch, Markus, Baumgardner, Darrel, Chuang, Ming-Tung, Gillett, Robert, Lee, Meehye, Molloy, Suzie, Moolla, Raeesa, Wang, Tao, Sharps, Katrina, Adame, Jose A., Ancellet, Gerard, Apadula, Francesco, Artaxo, Paulo, Barlasina, Maria E., Bogucka, Magdalena, Bonasoni, Paolo, Chang, Limseok, Colomb, Aurelie, Cuevas-Agulló, Emilio, Cupeiro, Manuel, Degorska, Anna, Ding, Aijun, Fröhlich, Marina, Frolova, Marina, Gadhavi, Harish, Gheusi, Francois, Gilge, Stefan, Gonzalez, Margarita Y., Gros, Valerie, Hamad, Samera H., Helmig, Detlev, Henriques, Diamantino, Hermansen, Ove, Holla, Robert, Hueber, Jacques, Im, Ulas, Jaffe, Daniel A., Komala, Ninong, Kubistin, Dagmar, Lam, Ka-Se, Laurila, Tuomas, Lee, Haeyoung, Levy, Ilan, Mazzoleni, Claudio, Mazzoleni, Lynn, McClure-Begley, Audra, Mohamad, Maznorizan, Murovic, Marijana, Navarro-Comas, Monica, Nicodim, Florin, Parrish, David, Read, Katie A., Reid, Nick, Ries, Ludwig, Saxena, Pallavi, Schwab, James J., Scorgie, Yvonne, Senik, Irina, Simmonds, Peter, Sinha, Vinayak, Skorokhod, Andrey I., Spain, Gerard, Spangl, Wolfgang, Spoor, Ronald, Springston, Stephen R., Steer, Kelvyn, Steinbacher, Martin, Suharguniyawan, Eka, Torre, Paul, Trickl, Thomas, Weili, Lin, Weller, Rolf, Xiaobin, Xu, Xue, Likun, and Zhiqiang, Ma

Abstract

In support of the first Tropospheric Ozone Assessment Report (TOAR) a relational database of global surface ozone observations has been developed and populated with hourly measurement data and enhanced metadata. A comprehensive suite of ozone data products including standard statistics, health and vegetation impact metrics, and trend information, are made available through a common data portal and a web interface. These data form the basis of the TOAR analyses focusing on human health, vegetation, and climate relevant ozone issues, which are part of this special feature. Cooperation among many data centers and individual researchers worldwide made it possible to build the world's largest collection of in-situ hourly surface ozone data covering the period from 1970 to 2015. By combining the data from almost 10,000 measurement sites around the world with global metadata information, new analyses of surface ozone have become possible, such as the first globally consistent characterisations of measurement sites as either urban or rural/remote. Exploitation of these global metadata allows for new insights into the global distribution, and seasonal and long-term changes of tropospheric ozone and they enable TOAR to perform the first, globally consistent analysis of present-day ozone concentrations and recent ozone changes with relevance to health, agriculture, and climate. Considerable effort was made to harmonize and synthesize data formats and metadata information from various networks and individual data submissions. Extensive quality control was applied to identify questionable and erroneous data, including changes in apparent instrument offsets or calibrations. Such data were excluded from TOAR data products. Limitations of a posteriori data quality assurance are discussed. As a result of the work presented here, global coverage of surface ozone data for scientific analysis has been significantly extended. Yet, large gaps remain in the surface observation network bot

Published
2017

5. Southern Hemisphere Additional Ozonesondes (SHADOZ) ozone climatology (2005-2009): Tropospheric and tropical tropopause layer (TTL) profiles with comparisons to OMI-based ozone products

Author

Thompson, Anne M., Miller, Sonya K., Tilmes, Simone, Kollonige, Debra W., Witte, Jacquelyn C., Oltmans, Samuel J., Johnson, Bryan J., 1000000360941, Fujiwara, Masatomo, Schmidlin, F. J., Coetzee, G. J. R., Komala, Ninong, Maata, Matakite, bt Mohamad, Maznorizan, Nguyo, J., Mutai, C., Ogino, S-Y., Da Silva, F. Raimundo, Leme, N. M. Paes, Posny, Francoise, Scheele, Rinus, Selkirk, Henry B., Shiotani, Masato, Stübi, René, Levrat, Gilbert, Calpini, Bertrand, Thouret, Valérie, Tsuruta, Haruo, Canossa, Jessica Valverde, Vömel, Holger, Yonemura, S., Diaz, Jorge Andrés, Tan Thanh, Nguyen T., Thuy Ha, Hoang T., Thompson, Anne M., Miller, Sonya K., Tilmes, Simone, Kollonige, Debra W., Witte, Jacquelyn C., Oltmans, Samuel J., Johnson, Bryan J., 1000000360941, Fujiwara, Masatomo, Schmidlin, F. J., Coetzee, G. J. R., Komala, Ninong, Maata, Matakite, bt Mohamad, Maznorizan, Nguyo, J., Mutai, C., Ogino, S-Y., Da Silva, F. Raimundo, Leme, N. M. Paes, Posny, Francoise, Scheele, Rinus, Selkirk, Henry B., Shiotani, Masato, Stübi, René, Levrat, Gilbert, Calpini, Bertrand, Thouret, Valérie, Tsuruta, Haruo, Canossa, Jessica Valverde, Vömel, Holger, Yonemura, S., Diaz, Jorge Andrés, Tan Thanh, Nguyen T., and Thuy Ha, Hoang T.

Published
2012

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