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Recent Trends in Global Ocean ChlorophyllRecent analyses of SeaWiFS data have shown that global ocean chlorophyll has increased more than 5% since 1998. The North Pacific ocean basin has increased nearly 19%. To understand the causes of these trends we have applied the newly developed NASA Ocean Biogeochemical Assimilation Model (OBAM), which is driven in mechanistic fashion by surface winds, sea surface temperature, atmospheric iron deposition, sea ice, and surface irradiance. The mode1 utilizes chlorophyll from SeaWiFS in a daily assimilation. The model has in place many of the climatic variables that can be expected to produce the changes observed in SeaWiFS data. Th~s enables us to diagnose the model performance, the assimilation performance, and possible causes for the increase in chlorophyll.
Document ID
20040081066
Document Type
Conference Paper
Authors
Gregg, Watson (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Casey, Nancy (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Subject Category
Oceanography
Meeting Information
ASLO/TOS Meeting(Honolulu, HI)
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.