Sciences and Exploration Directorate

Ryan M. Stauffer

(Principal Investigator)

Ryan M. Stauffer's Contact Card & Information.
Phone: 301.614.5552
Org Code: 614
Mail Code 614
Greenbelt, MD 20771

Brief Bio

Dr. Ryan M. Stauffer is a Research AST in the NASA/GSFC Atmospheric Chemistry and Dynamics Laboratory (Code 614). He analyzes long-term records of balloon-borne 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) tropical ozonesonde network. Dr. Stauffer has also participated in numerous field projects focused on near-surface and tropospheric air quality and pollution including CAPABLE, DISCOVER-AQ, SEAC4RS, KORUS-AQ, OWLETS, SCOAPE, and SCOAPE-II. 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.

Current Projects

SHADOZ Ozonesonde Network


The SHADOZ network is an international effort currently led by PI Dr. Ryan M. Stauffer (Founding PI Dr. Anne M. Thompson) to facilitate regular ozonesonde profiling at tropical and subtropical locations. Website:



Balloon-borne profiles of ozone and water vapor have been collected in the San Jose, Costa Rica region since 2005. Ticosonde represents the only long term in-situ measurements of water vapor in the tropics, making it a critical dataset for satellite validation and climate monitoring.

Satellite Coastal and Oceanic Atmospheric Pollution Experiment 2 (SCOAPE-II)

SCOAPE-II is a June 2024 follow-on to the May 2019 SCOAPE air quality cruise campaign. In addition to air quality, particularly NO2, methane emissions from Gulf of Mexico offshore oil and gas operations are a primary focus. The SCOAPE-II campaign will combine ship, aircraft, and satellite measurements to provide a comprehensive view of offshore oil and gas activity emissions. SCOAPE-II also represents an opportunity to validate the TEMPO geostationary air quality satellite.

Satellite Coastal and Oceanic Atmospheric Pollution Experiment (SCOAPE)


The SCOAPE Project aims to test the feasibility of measuring air quality and emissions from oil and natural gas operations in coastal waters surrounding the US, with a focus on the Gulf of Mexico. The project is an interagency partnership between the Bureau of Ocean Energy Management (BOEM) and NASA, and is lead by PI Bryan Duncan, Chief Scientist Anne Thompson, and Project Manager Debra Kollonige. The project is divided into two major segments 1) A comprehensive report on past and current observations of air quality from satellites and ship-based sampling campaings in coastal waters including DANCE (Mid-Atlantic US in Summer 2014) and KORUS-OC (South Korea in Spring 2016) and 2) A 9-day cruise campaign in the Gulf of Mexico in May 2019.

NDACC Steering Committee Sonde Working Group Co-Chair

Assessment of Standard Operating Procedures for Ozonesondes (ASOPOS)


Research AST

NASA - NASA/GSFC, Greenbelt, MD

March 2021 - Present

Visiting Assistant Research Scientist

Earth System Science Interdisciplinary Center (Univ. of MD) - NASA/GSFC, Greenbelt, MD

October 2019 - February 2021

NASA NPP Postdoctoral Fellow

USRA, NPP Advisor: Dr. Anne M. Thompson - NASA/GSFC

October 2016 - October 2019

Faculty Research Assistant

Earth System Science Interdisciplinary Center (Univ. of MD) - College Park, MD, USA

May 2016 - October 2016

Research Assistant

The Pennsylvania State University - University Park, PA, USA

May 2010 - May 2016


B.S. Meteorology/Minor in Mathematics, Millersville University, 2010

M.S. Meteorology, The Pennsylvania State University, 2012

Ph.D. Meteorology, The Pennsylvania State University, 2016

Professional Societies

American Meteorological Society

2006 - Present

American Geophysical Union

2011 - Present


  • PASSHE Board of Governor’s Scholarship (2006-2010)
  • John A. Pucillo Memorial Scholarship (Student-Athlete, 2009)
  • 1st Place Poster Presentation 15th Annual Penn State Environmental Chemistry Student Symposium (2012)
  • 3rd Place Poster Presentation College of EMS Sciences Graduate Student Exhibition (2012)
  • 1st Place Poster Presentation 16th Annual Penn State Environmental Chemistry and Microbiology Student Symposium (2013)
  • NASA Group Achievement Award (SEAC4RS Science Team, 2014)
  • NASA Group Achievement Award (DISCOVER-AQ Science Team, 2015)
  • NASA Group Achievement Award (OWLETS Science Team, 2019)
  • Code 610AT Outstanding Performance - Technical or Field Campaign Support Award (SCOAPE, 2019)
  • Code 600 Special Act Award – Exceptional Support of Air Quality Instrumentation during GSFC Stage 3 and 4 Operating Status (2020)
  • Code 610AT Distinguished Contribution Group Award – “For spearheading global ozonesonde quality assurance research in the past 5 years, providing new data critical to maintaining quantitative ozone profile trends.” (2020)
  • 2020 Robert H. Goddard Science Team Award: 614/Ozone Monitoring Instrument (OMI) COVID-19 response team (2021)
  • NOAA Virtual Global Monitoring Annual Conference (eGMAC) Early Career Presentation Award (2021)




2024. "Dynamical drivers of free-tropospheric ozone increases over equatorial Southeast Asia." Atmospheric Chemistry and Physics [] [Journal Article/Letter]

2024. "Satellite NO2 Trends and Hotspots Over Offshore Oil and Gas Operations in the Gulf of Mexico." Earth and Space Science 11 (3): [10.1029/2023ea003165] [Journal Article/Letter]

2024. "New insights from the Jülich Ozone Sonde Intercomparison Experiment: calibration functions traceable to one ozone reference instrument." Atmospheric Measurement Techniques 17 (1): 73-112 [10.5194/amt-17-73-2024] [Journal Article/Letter]

2023. "Rapid ozone depletion after humidification of the stratosphere by the Hunga Tonga Eruption." Science 382 (6668): [10.1126/science.adg2551] [Journal Article/Letter]

2023. "Flood Impacts on Net Ecosystem Exchange in the Midwestern and Southern United States in 2019." Journal of Geophysical Research: Atmospheres 128 (18): [10.1029/2022jd037697] [Journal Article/Letter]

2023. "New Insights From The Jülich Ozone-Sonde Intercomparison Experiments: Calibration Functions Traceable To One Ozone Reference Instrument." Atmospheric Measurement Techniques [10.5194/egusphere-2023-1466] [Journal Article/Letter]

2023. "Surf, Turf, and Above the Earth: Unmet Needs for Coastal Air Quality Science in the Planetary Boundary Layer (PBL)." Earth's Future 11 (6): [10.1029/2023ef003535] [Journal Article/Letter]

2023. "Tropospheric ozone column dataset from OMPS-LP/OMPS-NM limb-nadir matching." Atmo [10.5194/amt-2023-87] [Journal Article/Letter]

2022. "Comment on “Observation of large and all-season ozone losses over the tropics” [AIP Adv. 12, 075006 (2022)]." AIP Advances 12 (12): [10.1063/5.0121723] [Journal Article/Letter]

2022. "SAGE III/ISS ozone and NO2 validation using diurnal scaling factors." Atmospheric Measurement Techniques 15 (20): 6145-6161 [10.5194/amt-15-6145-2022] [Journal Article/Letter]

2022. "An Examination of the Recent Stability of Ozonesonde Global Network Data." Earth and Space Science 9 (10): [10.1029/2022ea002459] [Journal Article/Letter]

2022. "A Modern Approach to Stability-Based Definition of the Tropopause." Monthly Weather Review [10.1175/mwr-d-22-0174.1] [Journal Article/Letter]

2022. "Homogenization of the Observatoire de Haute Provence ECC ozonesonde data record: comparison with lidar and satellite observations." Atmospheric Measurement Techniques 15 3105–3120 [10.5194/amt-2022-7] [Journal Article/Letter]

2022. "Combined UV and IR ozone profile retrieval from TROPOMI and CrIS measurements." Atmospheric Measurement Techniques 15 2955–2978 [10.5194/amt-2021-412] [Journal Article/Letter]

2021. "TROPOMI tropospheric ozone column data: Geophysical assessment and comparison to ozonesondes, GOME-2B and OMI." Atmospheric Measurement Techniques 14 7405–7433 [10.5194/amt-2020-123] [Journal Article/Letter]

2021. "Regional and Seasonal Trends in Tropical Ozone From SHADOZ Profiles: Reference for Models and Satellite Products." Journal of Geophysical Research: Atmospheres 126 (22): [10.1029/2021jd034691] [Journal Article/Letter]

2021. "On the Probabilities of Environmental Extremes." International Journal of Statistics in Medical Research 10 72-84 [10.6000/1929-6029.2021.10.07] [Journal Article/Letter]

2021. "Improving ECC Ozonesonde Data Quality: Assessment of Current Methods and Outstanding Issues." Earth and Space Science 8 (3): [10.1029/2019ea000914] [Journal Article/Letter]

2021. "COVID‐19 Crisis Reduces Free Tropospheric Ozone Across the Northern Hemisphere." Geophysical Research Letters 48 (5): [10.1029/2020gl091987] [Journal Article/Letter]

2021. "New In Situ Aerosol Hyperspectral Optical Measurements over 300–700 nm, Part 2: Extinction, Total Absorption, Water- and Methanol-soluble Absorption observed during the KORUS-OC cruise." Atmospheric Measurement Techniques 14 715–736 [10.5194/amt-2020-318] [Journal Article/Letter]

2020. "SCOAPE: Satellite and Shipboard Views of Air Quality along the Louisiana Coast." EM: The Magazine for Environmental Managers (Oct. 2020): 28-33 [Full Text] [Magazine]

2020. "New In Situ Aerosol Hyperspectral Optical Measurements over 300–700 nm, Part 1: Spectral Aerosol Extinction (SpEx) Instrument Field Validation during the KORUS-OC cruise." Atmospheric Measurement Techniques [10.5194/amt-2020-317] [Journal Article/Letter]

2020. "A Post‐2013 Dropoff in Total Ozone at a Third of Global Ozonesonde Stations: Electrochemical Concentration Cell Instrument Artifacts?." Geophysical Research Letters 47 (11): [10.1029/2019gl086791] [Journal Article/Letter]

2020. "A new method to correct the ECC ozone sonde time response and its implications for “background current” and pump efficiency." Atmospheric Measurement Techniques [10.5194/amt-2020-62] [Journal Article/Letter]

2020. "Impact of Aerosols From Urban and Shipping Emission Sources on Terrestrial Carbon Uptake and Evapotranspiration: A Case Study in East Asia." Journal of Geophysical Research: Atmospheres 125 (2): [10.1029/2019jd030818] [Journal Article/Letter]

2019. "Comparison of Near‐Surface NO 2 Pollution With Pandora Total Column NO 2 During the Korea‐United States Ocean Color (KORUS OC) Campaign." Journal of Geophysical Research: Atmospheres 124 (23): 13560-13575 [10.1029/2019jd030765] [Journal Article/Letter]

2019. "The Effects of a 1998 Observing System Change on MERRA-2-based Ozone Profile Simulations." Journal of Geophysical Research: Atmospheres 124 7429– 7441 [10.1029/2019jd030257] [Journal Article/Letter]

2019. "Taehwa Research Forest: a receptor site for severe domestic pollution events in Korea during 2016." Atmospheric Chemistry and Physics 19 5051-5067 [] [Journal Article/Letter]

2019. "The Ozone Water-Land Environmental Transition Study (OWLETS): An Innovative Strategy for Understanding Chesapeake Bay Pollution Events." Bulletin of the American Meteorological Society 100 (2): 291-306 [10.1175/BAMS-D-18-0025.1] [Journal Article/Letter]

2019. "Ozonesonde Quality Assurance: The JOSIE-SHADOZ (2017) Experience." Bulletin of the American Meteorological Society 100 (1): 155-171 [10.1175/bams-d-17-0311.1] [Journal Article/Letter]

2018. "Atmospheric Trace Gas (NO2 and O3) Variability in South Korean Coastal Waters, and Implications for Remote Sensing of Coastal Ocean Color Dynamics." Remote Sensing 10 (10): 1587 [10.3390/rs10101587] [Journal Article/Letter]

2018. "Evaluating high-resolution forecasts of atmospheric CO and CO2 from a global prediction system during KORUS-AQ field campaign." Atmospheric Chemistry and Physics 18 (15): 11007-11030 [10.5194/acp-18-11007-2018] [Journal Article/Letter]

2018. "Characterizing Global Ozonesonde Profile Variability from Surface to the UT/LS with a Clustering Technique and MERRA-2 Reanalysis." Journal of Geophysical Research - Atmospheres 123 6213-6229 [10.1029/2018JD028465] [Journal Article/Letter]

2018. "Boundary layer pollution profiles from a rural site in South Korea." EPJ Web of Conferences 176 04004 [10.1051/epjconf/201817604004] [Journal Article/Letter]

2017. "Ozone Variability and Anomalies Observed during SENEX and SEAC4RS Campaigns in 2013." Journal of Geophysical Research: Atmospheres 122 11227–11241 [10.1002/2017jd027139] [Journal Article/Letter]

2017. "The effect of entrainment through atmospheric boundary layer growth on observed and modeled surface ozone in the Colorado Front Range." Journal of Geophysical Research: Atmospheres 122 (11): 6075-6093 [10.1002/2016jd026245] [Journal Article/Letter]

2017. "Tropospheric ozonesonde profiles at long-term U.S. monitoring sites: 2. Links between Trinidad Head, CA, profile clusters and inland surface ozone measurements." Journal of Geophysical Research: Atmospheres 122 1261–1280 [10.1002/2016jd025254] [Journal Article/Letter]

2016. "CAMx ozone source attribution in the eastern United States using guidance from observations during DISCOVER-AQ Maryland." Geophysical Research Letters 43 (5): 2249-2258 [10.1002/2015gl067332] [Journal Article/Letter]

2016. "Tropospheric ozonesonde profiles at long-term U.S. monitoring sites: 1. A climatology based on self-organizing maps." J. Geophys. Res. Atmos. 121 (3): 1320-1339 [10.1002/2015jd023641] [Journal Article/Letter]

2015. "Bay breeze climatology at two sites along the Chesapeake bay from 1986–2010: Implications for surface ozone." Journal of Atmospheric Chemistry 72 (3-4): 355-372 [10.1007/s10874-013-9260-y] [Journal Article/Letter]

2014. "Ozone profiles in the Baltimore-Washington region (2006-2011): satellite comparisons and DISCOVER-AQ observations." Journal of Atmospheric Chemistry 72 (3-4): [10.1007/s10874-014-9283-z] [Journal Article/Letter]

2014. "Propagation of radiosonde pressure sensor errors to ozonesonde measurements." Atmos. Meas. Tech. 7 (1): 65-79 [10.5194/amt-7-65-2014] [Journal Article/Letter]

2013. "Estimating surface NO2 and SO2 mixing ratios from fast-response total column observations and potential application to geostationary missions." Journal of Atmospheric Chemistry 72 (3-4): 261-286 [10.1007/s10874-013-9257-6] [Journal Article/Letter]

2013. "Ozone correlations between mid-tropospheric partial columns and the near-surface at two mid-atlantic sites during the DISCOVER-AQ campaign in July 2011." Journal of Atmospheric Chemistry 72 (3-4): 373-391 [10.1007/s10874-013-9259-4] [Journal Article/Letter]

2012. "Surface ozone at a coastal suburban site in 2009 and 2010: Relationships to chemical and meteorological processes." J. Geophys. Res. 117 D05306 [doi: 10.1029/2011JD016828] [Journal Article/Letter]

2012. "Bay breeze influence on surface ozone at Edgewood, MD during July 2011." Journal of Atmospheric Chemistry 72 (3-4): 335-353 [10.1007/s10874-012-9241-6] [Journal Article/Letter]


2020. "Linking the 23-year Trinidad Head, CA, ozonesonde profile record to surface O3 pollution." Environmental Manager 20-25 [Magazine]

2020. "Satellite and shipboard views of air quality along the Louisiana coast: The 2019 SCOAPE (Satellite Coastal and Oceanic Atmospheric Pollution Experiment) cruise." EM: Environmental Manager Special Issue 6 pp [Magazine]

2014. "Chesapeake bay breeze: Enhancement of air pollution episodes and boundary layer venting." EM: The Magazine for Environmental Managers (Sept. 2014): 22-26 [Full Text] [Magazine]