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SHADOZ’s Silver Anniversary: 25 Years of Accomplishments from the Premier Tropical Ozonesonde Network

R.M. Stauffer1, A.M. Thompson1, D.E. Kollonige1,2, B.J. Johnson3 and P. Cullis4,3

1NASA Goddard Space Flight Center (GSFC), Atmospheric Chemistry and Dynamics Laboratory, Greenbelt, MD 20771; 301-614-5552, E-mail: ryan.m.stauffer@nasa.gov
2Science Systems and Applications, Inc. (SSAI), Lanham, MD 20706
3NOAA Global Monitoring Laboratory (GML), Boulder, CO 80305
4Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, CO 80309

The Southern Hemisphere Additional Ozonesondes (SHADOZ) tropical and subtropical ozonesonde network has collected balloon-borne ozone profile data since 1998, and marks its 25th year of operation in 2022. Since its inception with 10 contributing stations, all located in the Southern Hemisphere, the network has since expanded to 14 currently-operating stations spanning the subtropics in both hemispheres (Figure 1). To date, well over 9000 ozone and meteorological profiles have been archived at https://tropo.gsfc.nasa.gov/shadoz/Archive.html. The network has facilitated innumerous contributions to ozone and climate science, chemical model evaluation, and validation of dozens of ozone-measuring satellite instruments. The SHADOZ network and its Co-Investigators and Collaborators have also invested significant effort in the past two+ decades in improving the accuracy of the ozonesonde data through laboratory and field experiments, prescription of ozonesonde standard operating procedures, and guidelines for the reprocessing of historical data records. The involvement of SHADOZ in the ongoing ozonesonde data quality assurance effort is a focus of this presentation. We also present a brief overview of the scientific and technical accomplishments of the past 25 years that have led to the recognition of SHADOZ as a premier global ground-based network for high-quality Earth Science data.

Figure 1

Figure 1. Figure 1. Top: Map of the 14 SHADOZ stations with at least 10 years of profile data since 1998. Bottom: Ozone mixing ratio annual average from the 10 tropical stations within the dashed box on the top panel. The tropical tropospheric “wave-one” ozone pattern is visualized as a longitude-height cross section with the ozone peak in the mid-troposphere over the Tropical Atlantic Ocean near Ascension Island.