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Proceedings Paper

Assessing the ecological impact of the Antarctic ozone hole using multisensor satellite data
Author(s): Dan Lubin; Kevin Arrigo; Osmund Holm-Hansen
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Paper Abstract

We have developed a satellite-based numerical simulation for determining the extent to which enhanced solar ultraviolet radiation (UVR) under the springtime Antarctic ozone decrese 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 were substantial under all ozone conditions, due mostly to UV-A. However, when integrated to the 0.1% light depth, the loss of primary production resulting from enhanced fluxes of UV-B due to ozone depletion was less than 0.25%. The loss of primary production is minimized by the strong attenuation of UVR in the water column and by the spatial and temporal mismatch between the maximum extent of the Antarctic ozone hole and the maximum abundance of phytoplankton in the open water.

Paper Details

Date Published: 4 November 2003
PDF: 9 pages
Proc. SPIE 5156, Ultraviolet Ground- and Space-based Measurements, Models, and Effects III, (4 November 2003); doi: 10.1117/12.509148
Show Author Affiliations
Dan Lubin, Scripps Institution of Oceanography (United States)
Kevin Arrigo, Stanford Univ. (United States)
Osmund Holm-Hansen, Scripps Institution of Oceanography (United States)


Published in SPIE Proceedings Vol. 5156:
Ultraviolet Ground- and Space-based Measurements, Models, and Effects III
James R. Slusser; Jay R. Herman; Wei Gao, Editor(s)

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