HR: 17:15h
AN: A42G-05    [PDF]
TI: Large-Scale Ozone Variations in the Arctic During SOLVE-2 and Comparisons of Remote and In Situ Ozone Profile Measurements
AU: * Browell, E V
EM: Edward.V.Browell@nasa.gov
AF: NASA Langley Research Center, Mail Stop 401A, Hampton, VA 23681 United States
AU: Fenn, M A
EM: m.a.fenn@larc.nasa.gov
AF: NASA Langley Research Center, Mail Stop 401A, Hampton, VA 23681 United States
AU: Grant, W B
EM: w.b.grant@larc.nasa.gov
AF: NASA Langley Research Center, Mail Stop 401A, Hampton, VA 23681 United States
AU: Avery, M A
EM: m.a.avery@larc.nasa.gov
AF: NASA Langley Research Center, Mail Stop 401A, Hampton, VA 23681 United States
AU: Neuber, R
EM: neuber@awi-potsdam.de
AF: Alfred Wegener Institute, Forschungsstelle Potsdam Telegrafenberg A43, Potsdam, D-14473 Germany
AU: McGee, T J
EM: mcgee@aeolus.gsfc.nasa.gov
AF: NASA Goddard Space Flight Center, Code-916, Greenbelt, MD 20771 United States
AU: Trepte, C R
EM: c.r.trepte@larc.nasa.gov
AF: NASA Langley Research Center, Mail Stop 401A, Hampton, VA 23681 United States
AU: Butler, C F
EM: c.f.butler@larc.nasa.gov
AF: NASA Langley Research Center, Mail Stop 401A, Hampton, VA 23681 United States
AU: Kooi, S A
EM: s.a.kooi@larc.nasa.gov
AF: NASA Langley Research Center, Mail Stop 401A, Hampton, VA 23681 United States
AU: Notari, A
EM: a.notari@larc.nasa.gov
AF: NASA Langley Research Center, Mail Stop 401A, Hampton, VA 23681 United States
AU: Hair, J W
EM: j.w.hair@larc.nasa.gov
AF: NASA Langley Research Center, Mail Stop 401A, Hampton, VA 23681 United States
AU: Lait, L R
EM: lrlait@ertel.gsfc.nasa.gov
AF: NASA Goddard Space Flight Center, Code-916, Greenbelt, MD 20771 United States
AB: Ozone cross sections were obtained from near the surface to above 30 km along the ground track of the NASA DC-8 on long-range flights across the Arctic during the 2003 SAGE-III (Stratospheric Aerosol and Gas Experiment) Ozone Loss and Validation Experiment (SOLVE-2). Extensive regions of lower than expected ozone were found inside the polar vortex below about 22 km at the start of the mission (January 9, 2003), and by the end of mission (February 12, 2003) ozone had decreased to less than 2.0 ppm in localized regions inside the vortex at about 19 km. These regions of particularly low ozone were associated with air masses that had seen extended periods of sunlight. Extensive structure was observed in the ozone field near the edge of the vortex on many flights, and on occasion, large filaments of extra-vortex air were observed inside the vortex. When the vortex divided into two separate vortices, the ozone field reflected the separation with extra-vortex air in between. The nadir ozone data showed strong evidence of downward transport in vicinity of jet streams, and these intrusions were observed to extend down to below 4 km in some cases. Directly under the vortex, large-scale descent of stratospheric air produced ozone levels exceeding 100 ppbv down to 5 km. This is the first time the entire ozone cross section was obtained during an airborne field experiment, and it will provide important new information on atmospheric dynamics and ozone chemistry in the Arctic. This experiment also provided a unique opportunity to compare ozone measurements from several different remote and in situ instruments. Ozone profiles were measured above and below the DC-8 with the airborne UV Differential Absorption Lidar (DIAL) system, and the Airborne Raman Ozone, Temperature, and Aerosol Lidar (AROTAL) measured ozone profiles above the aircraft. In situ ozone measurements were made at the DC-8 flight level, and ground-based lidar and ozonesonde measurements were made from Ny-�lesund. Coincident SAGE-III and DC-8 ozone measurements were obtained as the primary objective of SOLVE-2. Good agreement was found between in situ and nadir DIAL measurements; DIAL, AROTAL, and SAGE-III measurements; Ny-�lesund lidar, ozonesondes, DIAL, and AROTAL. Examples of all these different types of ozone intercomparisons will be presented.
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0341 Middle atmosphere--constituent transport and chemistry (3334)
DE: 0365 Troposphere--composition and chemistry
DE: 3362 Stratosphere/troposphere interactions
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting