Southern Hemisphere Additional Ozonesondes (SHADOZ) 1998–2000 tropical ozone climatology 1. Comparison with Total Ozone Mapping Spectrometer (TOMS) and ground-based measurements

doi:doi:10.1029/2001JD000967

Abstract

Cited By (71)

Abstract

Southern Hemisphere Additional Ozonesondes (SHADOZ) 1998–2000 tropical ozone climatology 1. Comparison with Total Ozone Mapping Spectrometer (TOMS) and ground-based measurements

Anne M. Thompson

NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

Jacquelyn C. Witte

NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

Richard D. McPeters

NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

Samuel J. Oltmans

NOAA Climate Monitoring and Diagnostics Laboratory, Boulder, Colorado, USA

Francis J. Schmidlin

NASA Wallops Flight Facility, Wallops Island, Virginia, USA

Jennifer A. Logan

Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts, USA

Masatomo Fujiwara

Radio Science Center for Space and Atmosphere, Kyoto University, Kyoto, Japan

Volker W. J. H. Kirchhoff

INPE Laboratorio Ozonio, São José dos Campos, Brazil

Françoise Posny

Université de la Réunion, St.-Denis, Réunion, France

Gert J. R. Coetzee

South African Weather Service, Pretoria, South Africa

Bruno Hoegger

Swiss Aerological Observatory, Payerne, Switzerland

Shuji Kawakami

NASDA Earth Observations Research Center, Tokyo, Japan

Toshihiro Ogawa

NASDA Earth Observations Research Center, Tokyo, Japan

Bryan J. Johnson

NOAA Climate Monitoring and Diagnostics Laboratory, Boulder, Colorado, USA

Holger Vömel

NOAA Climate Monitoring and Diagnostics Laboratory, Boulder, Colorado, USA

Gordon Labow

NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

A network of 10 southern hemisphere tropical and subtropical stations, designated the Southern Hemisphere Additional Ozonesondes (SHADOZ) project and established from operational sites, provided over 1000 ozone profiles during the period 1998–2000. Balloon-borne electrochemical concentration cell (ECC) ozonesondes, combined with standard radiosondes for pressure, temperature, and relative humidity measurements, collected profiles in the troposphere and lower to midstratosphere at: Ascension Island; Nairobi, Kenya; Irene, South Africa; Réunion Island; Watukosek, Java; Fiji; Tahiti; American Samoa; San Cristóbal, Galapagos; and Natal, Brazil. The archived data are available at: 〈 http://croc.gsfc.nasa.gov/shadoz〉. In this paper, uncertainties and accuracies within the SHADOZ ozone data set are evaluated by analyzing: (1) imprecisions in profiles and in methods of extrapolating ozone above balloon burst; (2) comparisons of column-integrated total ozone from sondes with total ozone from the Earth-Probe/Total Ozone Mapping Spectrometer (TOMS) satellite and ground-based instruments; and (3) possible biases from station to station due to variations in ozonesonde characteristics. The key results are the following: (1) Ozonesonde precision is 5%. (2) Integrated total ozone column amounts from the sondes are usually to within 5% of independent measurements from ground-based instruments at five SHADOZ sites and overpass measurements from the TOMS satellite (version 7 data). (3) Systematic variations in TOMS-sonde offsets and in ground-based-sonde offsets from station to station reflect biases in sonde technique as well as in satellite retrieval. Discrepancies are present in both stratospheric and tropospheric ozone. (4) There is evidence for a zonal wave-one pattern in total and tropospheric ozone, but not in stratospheric ozone.

Published 30 January 2003.

Citation: Thompson, A. M., et al. (2003), Southern Hemisphere Additional Ozonesondes (SHADOZ) 1998–2000 tropical ozone climatology 1. Comparison with Total Ozone Mapping Spectrometer (TOMS) and ground-based measurements, J. Geophys. Res., 108(D2), 8238, doi:10.1029/2001JD000967.

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