NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Patterns and Variability in Global Ocean Chlorophyll: Satellite Observations and ModelingRecent 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.
Document ID
20040081225
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Gregg, Watson
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Subject Category
Life Sciences (General)
Meeting Information
Meeting: Presentation: Geophysical Fluid Dynamics Laboratory
Location: Princeton, NJ
Country: United States
Start Date: March 18, 2004
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

There are no available downloads for this record.
No Preview Available