HR: 11:50h
AN: A11G-06    [PDF]
TI: Assessing the Ecological Impact of the Antarctic Ozone Hole Using Multisensor Satellite Data
AU: * Lubin, D
EM: dlubin@ucsd.edu
AF: Scripps Institution of Oceanography, UCSD, 9500 Gilman Drive, La Jolla, CA 92093-0221 United States
AU: Arrigo, K
EM: arrigo@pangea.stanford.edu
AF: Department of Geophysics, Stanford University, Stanford, CA 94305-2215 United States
AU: Holm-Hansen, O
EM: oholmhansen@ucsd.edu
AF: Scripps Institution of Oceanography, UCSD, 9500 Gilman Drive, La Jolla, CA 92093-0221 United States
AB: We have developed a satellite-based numerical simulation for determining the extent to which enhanced solar ultraviolet radiation (UVR) under the springtime Antarctic ozone decrease affects primary production throughout the Southern Ocean. This satellite approach using NASA Sea-viewing Wide Field-of-view Sensor (SeaWiFS) data for chlorophyll and phytoplankton biomass, passive microwave data for sea ice concentration, and Total Ozone Mapping Spectrometer (TOMS) data for total column ozone and cloud reflectivity, circumvents many of the limitations involved with extrapolating point field measurements to larger geographical areas. The satellite data are used to force a physiology-based model of phytoplankton growth in response to UV-B, UV-A, and photosynthetically active radiation (PAR). Comparison with field measurements in the Western Antarctic Peninsula region shows excellent agreement. UVR-induced losses of surface phytoplankton production are substantial, although depth-integrated phytoplankton losses are considerably smaller.
DE: 0343 Planetary atmospheres (5405, 5407, 5409, 5704, 5705, 5707)
DE: 0360 Transmission and scattering of radiation
DE: 4853 Photosynthesis
DE: 9310 Antarctica
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting