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

Anne M. Thompson NASA Goddard Space Flight Center, Greenbelt, Maryland

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Herman G. J. Smit Institute of Chemistry and Dynamics of the Geosphere: Troposphere, Jülich Research Centre, Jülich, Germany

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Jacquelyn C. Witte NASA Goddard Space Flight Center, Greenbelt, and Science Systems and Applications Inc., Lanham, Maryland

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Ryan M. Stauffer NASA Goddard Space Flight Center, Greenbelt, and Universities Space Research Association, Columbia, Maryland

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Bryan J. Johnson Global Monitoring Division, NOAA/Earth System Research Laboratory, Boulder, Colorado

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Gary Morris Natural Sciences, St. Edward's University, Austin, Texas

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Peter von der Gathen Alfred Wegener Institute, Potsdam, Germany

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Roeland Van Malderen Royal Meteorological Institute of Belgium, Brussels, Belgium

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Jonathan Davies Environment and Climate Change Canada, Toronto, Ontario, Canada

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Ankie Piters Royal Dutch Meteorological Institute, de Bilt, Netherlands

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Marc Allaart Royal Dutch Meteorological Institute, de Bilt, Netherlands

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Françoise Posny Laboratoire de l’Atmosphère et des Cyclones, UMR8105, Université de la Réunion, Météo-France, CNRS, La Réunion, France

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Rigel Kivi Finnish Meteorological Institute, Sodankylä, Finland

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Patrick Cullis Global Monitoring Division, NOAA/Earth System Research Laboratory, and Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado

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Nguyen Thi Hoang Anh Vietnam Meteorological Hydrological Administration, Hanoi, Vietnam

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Ernesto Corrales University of Costa Rica, San Pedro, San José, Costa Rica

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Tshidi Machinini South African Weather Service, Pretoria, South Africa

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Francisco R. da Silva Laboratory of Environmental and Tropical Variables, Brazilian Institute of Space Research, Natal, Brazil

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George Paiman Meteorological Service of Suriname, Paramaribo, Suriname

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Kennedy Thiong’o Kenyan Meteorological Department, Nairobi, Kenya

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Zamuna Zainal Atmospheric Science and Cloud Seeding Division, Malaysian Meteorological Department, Petaling Jaya, Selangor, Malaysia

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George B. Brothers CHEMAL, and NASA Wallops Flight Facility, Wallops Island, Virginia

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Katherine R. Wolff Science Systems and Applications Inc., Lanham, Maryland, and NASA Wallops Flight Facility, Wallops Island, Virginia

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Tatsumi Nakano Japan Meteorological Agency, Tokyo, Japan

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Rene Stübi MeteoSwiss, Payerne, Switzerland

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Gonzague Romanens MeteoSwiss, Payerne, Switzerland

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Gert J. R. Coetzee South African Weather Service, Pretoria, South Africa

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Jorge A. Diaz University of Costa Rica, San Pedro, San José, Costa Rica

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Sukarni Mitro Meteorological Service of Suriname, Paramaribo, Suriname

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Maznorizan Mohamad Atmospheric Science and Cloud Seeding Division, Malaysian Meteorological Department, Petaling Jaya, Selangor, Malaysia

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Shin-Ya Ogino Department of Coupled Ocean-Atmosphere-Land Processes Research, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan

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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.

© 2019 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).

CORRESPONDING AUTHOR: Anne M. Thompson, anne.m.thompson@nasa.gov

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.

© 2019 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).

CORRESPONDING AUTHOR: Anne M. Thompson, anne.m.thompson@nasa.gov
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