Impact of a deep ozone hole on Southern Ocean primary production

[1] Field studies show that photosynthesis by Antarctic phytoplankton is inhibited by the increased ultraviolet radiation (UVR) resulting from springtime stratospheric ozone (O3) depletion. To extend previous observations, a numerical model utilizing satellitederived distributions of O3, clouds, sea...

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Bibliographic Details
Main Authors: Kevin R. Arrigo, Dan Lubin, Gert L. Van Dijken, Osmund Holm-hansen, Esther Morrow
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
Chemical
Modeling
KEYWORDS
ozone
UV-inhibition
Antarctic
phytoplankton production
remote sensing
Southern Ocean
Antarc*
Sea ice
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.318.7089
http://spsp.ucsd.edu/Researchers/Dan_Lubin/pdfs/2001JC001226.pdf
Description
Summary:[1] Field studies show that photosynthesis by Antarctic phytoplankton is inhibited by the increased ultraviolet radiation (UVR) resulting from springtime stratospheric ozone (O3) depletion. To extend previous observations, a numerical model utilizing satellitederived distributions of O3, clouds, sea ice, surface temperature, and phytoplankton biomass was developed to study the hemispheric-scale seasonal effects of a deep Antarctic O3 hole on primary production in the Southern Ocean. UVR-induced losses of surface phytoplankton production were substantial under all O3 conditions, mostly due to UVA. However, when integrated to the 0.1 % light depth, the loss of primary production resulting from enhanced fluxes of UVB due to O3 depletion was <0.25%. The loss of primary production is minimized by the strong attenuation of UVR within the water column and by sea ice which is at its peak extent at the time of the most severe

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