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GEOPHYSICAL RESEARCH LETTERS,
VOL. 30, NO. 15,
1809,
doi:10.1029/2003GL016889,
2003
Ocean primary production and climate: Global decadal changes
Watson W. Gregg
Laboratory for Hydrospheric Processes, NASA/Goddard Space Flight Center, USA
Margarita E. Conkright
Ocean Climate Laboratory, NOAA/National Oceanographic Data Center, USA
Paul Ginoux
NOAA Geophysical Fluid Dynamics Laboratory, USA
John E. O'Reilly
NOAA/National Marine Fisheries Service, USA
Nancy W. Casey
Science Systems and Applications, Inc., USA
Abstract
Satellite-in situ blended ocean chlorophyll records indicate that global ocean annual primary production has declined more
than 6% since the early 1980's. Nearly 70% of the global decadal decline occurred in the high latitudes. In the northern high
latitudes, these reductions in primary production corresponded with increases in sea surface temperature and decreases in
atmospheric iron deposition to the oceans. In the Antarctic, the reductions were accompanied by increased wind stress. Three
of four low latitude basins exhibited decadal increases in annual primary production. These results indicate that ocean photosynthetic
uptake of carbon may be changing as a result of climatic changes and suggest major implications for the global carbon cycle.
Received 7
January
2003;
accepted 21
May
2003;
published 9
August
2003.
Index Terms: 4215 Oceanography: General: Climate and interannual variability (3309); 1615 Global Change: Biogeochemical processes (4805); 1635 Global Change: Oceans (4203); 4806 Oceanography: Biological and Chemical: Carbon cycling.
Read Full Article (file size: 252074 bytes) Cited by
Citation: Gregg, W. W., M. E. Conkright, P. Ginoux, J. E. O'Reilly, and N. W. Casey
(2003),
Ocean primary production and climate: Global decadal changes,
Geophys. Res. Lett.,
30(15),
1809,
doi:10.1029/2003GL016889.
Copyright 2003 by the American Geophysical Union.
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