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Tropical Tropospheric Ozone from SHADOZ (Southern Hemisphere ADditional Ozonesondes) Network: A Project for Satellite Research, Process Studies, EducationThe first climatological overview of total, stratospheric and tropospheric ozone in the southern hemisphere tropical and subtropics is based on ozone sounding data from 10 sites comprising the Southern Hemisphere Additional OZonesondes (SHADOZ) network. The period covered is 1998-2000. Observations were made over: Ascension Island; Nairobi, Kenya; Irene, South Africa; Reunion Island; Watukosek, Java; Fiji; Tahiti; American Samoa; San Cristobal, Galapagos; Natal, Brazil. Campaign data were collected on a trans-Atlantic oceanographic cruise and during SAFARI-2000 in Zambia. The ozone data, with simultaneous temperature profiles to approx. 7 hPa and relative humidity to approx. 200 hPa, reside at: . SHADOZ ozone time-series and profiles give a perspective on tropical total, stratospheric and tropospheric ozone. Prominent features are highly variable tropospheric ozone and a zonal wave-one pattern in total (and tropospheric) column ozone. Total, stratospheric and tropospheric column ozone amounts peak between August and November and are lowest between March and May. Tropospheric ozone variability over the Indian and Pacific Ocean displays influences of the Indian Ocean Dipole and convective mixing. Pollution transport from Africa and South America is a seasonal feature. Tropospheric ozone seasonality over the Atlantic Basin shows effects of regional subsidence and recirculation as well as biomass burning. Dynamical and chemical influences appear to be of comparable magnitude though model studies are needed to quantify this.
Document ID
20030020845
Document Type
Conference Paper
Authors
Thompson, Anne M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Witte, Jacquelyn C. (Science Systems and Applications, Inc. Greenbelt, MD, United States)
Oltmans, Samuel J. (National Oceanic and Atmospheric Administration Boulder, CO, United States)
Schmidlin, Francis J. (NASA Wallops Flight Center Wallops Island, VA, United States)
Coetzee, G. J. R. (South African Weather Bureau Pretoria, South Africa)
Hoegger, Bruno (Meteo-Suisse Aerological Station Payerne)
Kirchhoff, V. W. J. H. (Instituto de Pesquisas Espaciais Sao Jose dos Campos, Brazil)
Ogawa, Toshihiro (National Space Development Agency Tokyo, Japan)
Kawakami, Shuji (National Space Development Agency Tokyo, Japan)
Posny, Francoise (Universite de La Reunion Saint-Denis, Reunion)
Date Acquired
August 21, 2013
Publication Date
January 1, 2002
Subject Category
Meteorology and Climatology
Meeting Information
Joint CACGP/IGAC2002 Symposium(Heraklion)
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.