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Record 1 of 3346
Patterns and Variability in Global Ocean Chlorophyll: Satellite Observations and Modeling
Author and Affiliation:
Gregg, Watson(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 4% since 1998. The North Pacific ocean basin has increased nearly 19%. These trend analyses follow earlier results showing decadal declines in global ocean chlorophyll and primary production. To understand the causes of these changes and 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 model 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. This enables us to diagnose the model performance, the assimilation performance, and possible causes for the increase in chlorophyll. A full discussion of the changes and trends, possible causes, modeling approaches, and data assimilation will be the focus of the seminar.
Publication Date: Jan 01, 2004
Document ID:
20040081225
(Acquired Jul 14, 2004)
Subject Category: LIFE SCIENCES (GENERAL)
Document Type: Preprint
Meeting Information: Presentation: Geophysical Fluid Dynamics Laboratory; 18 Mar. 2004; Princeton, NJ; 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: CHLOROPHYLLS; OCEAN MODELS; DATA PROCESSING; PERIODIC VARIATIONS; SATELLITE OBSERVATION; SEA ICE; SEA-VIEWING WIDE FIELD-OF-VIEW SENSOR; PACIFIC OCEAN
Availability Source: Other Sources
Availability Notes: Abstract Only
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