An Overview of Ozone Variability during SEAC4RS from the Seacions Ozonesonde Network

Tuesday, 16 December 2014
Anne M Thompson1, Lesley E Ott1, Bryan N Duncan1, Sonya K Miller2, Jacqulyn C Witte3, Henry B Selkirk4, Gary A Morris5, Ryan M Stauffer2, Henry E Fuelberg6, Jack Fishman7, Kenneth R Minschwaner8, Bryan J Johnson9 and Mike Newchurch10, (1)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (2)Penn State University, University Park, PA, United States, (3)Science Systems and Applications, Inc., Lanham, MD, United States, (4)Universities Space Research Association Greenbelt, Greenbelt, MD, United States, (5)St. Edward's University, School of Natural Sciences, Austin, TX, United States, (6)Florida State Univ, Tallahassee, FL, United States, (7)Saint Louis Univ-O'Neil Hall, St Louis, MO, United States, (8)New Mexico Inst Mining & Tech, Socorro, NM, United States, (9)NOAA Boulder, ESRL/GMD, Boulder, CO, United States, (10)Univ of Alabama Huntsville, Huntsville, AL, United States
We designed a coordinated ozonesonde network for SEAC4RS in order to provide points of consistent ground-based sampling, targets for aircraft and satellite validation, and a dataset for evaluation and/or assimilation with regional and global models that cover the troposphere and stratosphere. Daily ozonesonde launches took place at Aura or Suomi/NPP overpass times in SEACIONS (Southeast America Consortium for Intensive Ozonesonde Network Study) working with 4 stations from our previous IONS campaigns (INTEX-A [2004], INTEX-B [2006]): Boulder, CO; Soccoro, NM; Houston, TX; and Huntsville, AL. This complement provided coverage for the SEAC4RS western region, where we expected to find North American Monsoon and wildfire influences and the south central US, where SEAC4RS targeted convection and the DC-8 sampled for sources of biogenic gases and aerosols. SEACIONS added two new stations: St. Louis, MO, where the Saint Louis University has a ground station in its “ozone garden”; and Tallahassee, FL. Highlights of ozone variability at each site are presented as well as case studies based on soundings and aircraft data. We focus on stratospheric intrusion episodes, using a high-resolution version of the GEOS-5 model with stratospheric tracers to elucidate ozone origins.