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Event Time
3:30 p.m.
Room: ATL2400 / Zoom

AOSC Seminar by Dr. Ryan Stauffer, 2/3/2022

AOSC Seminar

Dr. Ryan Stauffer



Title: Southern Hemisphere Additional Ozonesondes (SHADOZ): Accomplishments from 25 years of Tropical and Subtropical Ozone Profiling


Ozone (O3) is a vital trace gas in Earth’s atmosphere. It shields life from harmful UV radiation, but is a strong oxidant and harmful pollutant when found in high quantities near the surface. Ozone is also a greenhouse gas in the troposphere, so characterizing the vertical distribution of O3 is critical to determining its role in climate and effects on air quality. Satellite observations give us excellent spatial coverage of the total column O3 in the atmosphere, but are unable to resolve the O3 vertical profile with accuracy, especially below the stratosphere. Balloon-borne ozonesondes bridge this gap by providing high vertical resolution measurements from the surface to over 30 km altitude. Before the late 1990s, ozonesonde measurements in the tropics were sparse, so the Southern Hemisphere Additional Ozonesondes (SHADOZ; https://tropo.gsfc.nasa.gov/shadoz/index.html) strategic network organized over a dozen stations to frequently launch ozonesondes for pollution and climate studies. This talk features the history and accomplishments of SHADOZ from 1998-2021 including work on satellite and model validation, biomass burning, weather and climate links to O3, and O3 trends, as well as data reprocessing and quality assurance activities with global partners.



Dr. Ryan M. Stauffer is a Research Physical Scientist in the NASA/GSFC Chemistry and Atmospheric Dynamics Laboratory. Dr. Stauffer received his BS from Millersville University (PA), and MS and PhD from Penn State University, all in Meteorology. He analyzes long-term historical records of ozonesonde profile data, and the links among the ozone profiles, meteorology, and near-surface pollution. He serves as the Principal Investigator for the Southern Hemisphere Additional Ozonesondes (SHADOZ; Founding PI A. M. Thompson) tropical network. Dr. Stauffer has also participated in numerous NASA-sponsored field projects focused on near-surface and tropospheric air quality and pollution. These include CAPABLE (2009-2010), DISCOVER-AQ (2011-2014), SEAC4RS (2013), KORUS-AQ (2016), OWLETS (2017-2018), SCOAPE (2019), and TRACER-AQ (2021). He is currently a member of the Assessment of Standard Operating Procedures for Ozonesondes (ASOPOS) expert panel, and is leading an ASOPOS Task Team to examine data quality issues in the global ozonesonde network. He also serves as the Co-Chair of the Sonde Working Group on the Network for the Detection of Atmospheric Composition Change (NDACC) Steering Committee.


Contact: Ross Salawitch

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AOSC Seminar

Pre-seminar refreshment: N/A
Seminar: 3:30-4:30pm, Room (When in-person): ATL 2400 
Meet-the-Speaker: 4:30-5:00pm, Room: ATL 3400 [For AOSC Students only]

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