HR: 1340h
AN: A33A-0134    [Abstracts]
TI: The Antarctic Ozone Hole: Initial Results Fom Aura/OMI Compared with TOMS
AU: * McPeters, R D
EM: Richard.D.McPeters@nasa.gov
AF: NASA GSFC, Code 916, Greenbelt, MD 20771 United States
AU: Bhartia, P K
EM: pbhartia@pop900.gsfc.nasa.gov
AF: NASA GSFC, Code 916, Greenbelt, MD 20771 United States
AU: Newman, P
EM: newman@notus.gsfc.nasa.gov
AF: NASA GSFC, Code 916, Greenbelt, MD 20771 United States
AB: A series of TOMS instruments (on Nimbus 7, Meteor 3, and Earth Probe) has been monitoring the annual development of the Antarctic ozone hole since the 1980s. The ozone mapping instrument on Aura, OMI, is expected to take over this record of observation from the aging Earth Probe TOMS instrument. The area of the ozone hole can be taken as a sensitive indicator of the magnitude of ozone destruction each year. The timing of initial formation of the ozone hole and its duration are sensitive to the atmospheric dynamics of the southern polar regions. The entire TOMS data record (1978 - 2004) has recently been reprocessed with the new version 8 algorithm, which includes a revised calibration. The effect has been to slightly increase ozone hole area over earlier estimates, but only by 2-4%. OMI (Ozone Monitoring Instrument) on Aura is a hyperspectral imaging instrument that operates in a pushbroom mode to measure solar backscattered radiation in the ultraviolet and visible. OMI has higher spatial resolution than TOMS - 14 x 24 km versus 38 km x 38 km for TOMS. OMI has now begun mapping total column ozone on a global basis in a measurement similar to TOMS. The ozone hole measurements for 2004 are compared with those from Earth Probe TOMS.
DE: 3360 Remote sensing
DE: 3309 Climatology (1620)
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting