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Record 1 of 3345
Recent Trends in Global Ocean Chlorophyll
Author and Affiliation:
Gregg, Watson(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Casey, Nancy(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Abstract: Recent 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.
Publication Date: Jan 01, 2004
Document ID:
20040081066
(Acquired Jul 13, 2004)
Subject Category: OCEANOGRAPHY
Document Type: Preprint
Meeting Information: ASLO/TOS Meeting; 15-19 Feb. 2004; Honolulu, HI; United States
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: BIOGEOCHEMISTRY; CHLOROPHYLLS; OCEAN MODELS; SEA-VIEWING WIDE FIELD-OF-VIEW SENSOR; SEA ICE; TRENDS; ASSIMILATION; CLIMATOLOGY; IRRADIANCE
Availability Source: Other Sources
Availability Notes: Abstract Only
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