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The Southern Hemisphere Additional Ozonesondes (SHADOZ) 1998-2002 Tropical Ozone ClimatologyAbstract: Since 1998 the Southern Hemisphere ADditional OZonesondes (SHADOZ) project has collected more than 2000 ozone profiles from a dozen tropical and subtropical sites using balloon-borne electrochemical concentration cell (ECC) ozonesondes. The data (with accompanying pressure-temperature-humidity soundings) are archived. Analysis of ozonesonde imprecision within the SHADOZ dataset revealed that variations in ozonesonde technique could lead to station-to-station biases in the measurements. In this paper imprecisions and accuracy in the SHADOZ dataset are examined in light of new data. When SHADOZ total ozone column amounts are compared to version 8 TOMS (2004 release), discrepancies between sonde and satellite datasets decline 1-2 percentage points on average, compared to version 7 TOMS. Variability among stations is evaluated using total ozone normalized to TOMS and results of laboratory tests on ozonesondes (JOSE-2O00, Julich Ozonesonde Intercomparison Experiment). Ozone deviations from a standard instrument in the JOSE flight simulation chamber resemble those of SHADOZ station data relative to a SHADOZ-defined climatological reference. Certain systematic variations in SHADOZ ozone profiles are accounted for by differences in solution composition, data processing and instrument (manufacturer). Instrument bias leads to a greater ozone measurement above 25 km over Nairobi and to lower total column ozone at three Pacific sites compared to other SHADOZ stations at 0-20 deg.S.
Document ID
20040161494
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Thompson, Anne M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Witte, Jacqueline C. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Smit, Herman G. J. (Forschungszentrum Juelich G.m.b.H. Juelich, Germany)
Oltmans, Samuel J. (National Oceanic and Atmospheric Administration Boulder, CO, United States)
Johnson, Bryan J. (National Oceanic and Atmospheric Administration Boulder, CO, United States)
Kirchhoff, Volker W. J. H. (Instituto Nacional de Pesquisas Espacias Sao Jose dos Campos, Brazil)
Schmidlin, Francis J. (NASA Wallops Flight Center Wallops Island, VA, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2004
Subject Category
Meteorology And Climatology
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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