Antarctic Stratospheric Ozone from the Assimilation of Occultation Data

• Main Authors: Stajner, Ivanka, Wargan, Krzysztof
• Language: unknown
• Published: 2004
• Subjects: Instrumentation and Photography; Antarctic; Austral; The Antarctic; Antarc*
• Online Access: http://hdl.handle.net/2060/20040171244

Ozone data from the solar occultation Polar Ozone and Aerosol Measurement (POAM) III instrument are included in the ozone assimilation system at NASA's Global Modeling and Assimilation Office, which uses Solar Backscatter UItraViolet/2 (SBUV/2) instrument data. Even though POAM data are available at only one latitude in the southern hemisphere on each day, their assimilation leads to more realistic ozone distribution throughout the Antarctic region, especially inside the polar vortex. Impacts of POAM data were evaluated by comparisons of assimilated ozone profiles with independent ozone sondes. Major improvements in ozone representation are seen in the Antarctic lower stratosphere during austral Winter and spring in 1998. Limitations of assimilation of sparse occultation data are illustrated by an example.