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Decadal Comparison of Plankton Levels
The global ocean chlorophyll archive produced by the CZCS was revised using compatible algorithms with SeaWiFS. Both archives were then blended with in situ data to reduce residual errors. This methodology permitted a quantitative comparison of decadal changes in global ocean chlorophyll from the CZCS (1979 - 1986) and SeaWiFS (1997 - 2000) records. Global spatial distributions and seasonal variablility of ocean chlorophyll were similar, but global means decreased over the two observational segments. Major changes were observed regionally: chlorophyll concentrations decreased in the northern high latitudes while chlorophyll in the low latitudes increased. Mid-ocean gyres exhibited limited changes. The overall spatial and seasonal similarity of the two data records suggests that the changes are due to natural variability. These results provide evidence of how the Earth's climate may be changing and how ocean biota respond.

CZCS data for the Atlantic Ocean with grey land    CZCS data for the Atlantic Ocean with grey land

Available formats:
  2560 x 1920     TIFF 4 MB
  320 x 240         JPEG 26 KB


CZCS data for the Pacific Ocean with grey land    CZCS data for the Pacific Ocean with grey land

Available formats:
  2560 x 1920     TIFF 4 MB
  320 x 240         JPEG 27 KB


CZCS data for the world with grey land    CZCS data for the world with grey land

Available formats:
  2560 x 1920     TIFF 3 MB
  320 x 240         JPEG 20 KB


Difference data between CZCS and SeaWiFS for the Atlantic Ocean with grey land    Difference data between CZCS and SeaWiFS for the Atlantic Ocean with grey land

Available formats:
  2560 x 1920     TIFF 4 MB
  320 x 240         JPEG 26 KB


Difference data between CZCS and SeaWiFS for the Pacific Ocean with grey land    Difference data between CZCS and SeaWiFS for the Pacific Ocean with grey land

Available formats:
  2560 x 1920     TIFF 5 MB
  320 x 240         JPEG 26 KB


Difference data between CZCS and SeaWiFS for the world with grey land    Difference data between CZCS and SeaWiFS for the world with grey land

Available formats:
  2560 x 1920     TIFF 3 MB
  320 x 240         JPEG 20 KB


CZCS data of the Atlantic Ocean with black land    CZCS data of the Atlantic Ocean with black land

Available formats:
  2560 x 1920     TIFF 4 MB
  320 x 240         JPEG 26 KB


CZCS data of the Pacific Ocean with black land    CZCS data of the Pacific Ocean with black land

Available formats:
  2560 x 1920     TIFF 4 MB
  320 x 240         JPEG 27 KB


CZCS data of the world with black land    CZCS data of the world with black land

Available formats:
  2560 x 1920     TIFF 3 MB
  320 x 240         JPEG 20 KB


Difference data between the CZCS and SeaWiFS for the Atlantic Ocean with black land    Difference data between the CZCS and SeaWiFS for the Atlantic Ocean with black land

Available formats:
  2560 x 1920     TIFF 4 MB
  320 x 240         JPEG 27 KB


Difference data between CZCS and SeaWiFS for the Pacific Ocean with black land    Difference data between CZCS and SeaWiFS for the Pacific Ocean with black land

Available formats:
  2560 x 1920     TIFF 5 MB
  320 x 240         JPEG 26 KB


Difference data between CZCS and SeaWiFS for the world with black land    Difference data between CZCS and SeaWiFS for the world with black land

Available formats:
  2560 x 1920     TIFF 3 MB
  320 x 240         JPEG 20 KB
  160 x 80           PNG 18 KB
  80 x 40             PNG   5 KB


SeaWiFS data for the Atlantic Ocean with black land    SeaWiFS data for the Atlantic Ocean with black land

Available formats:
  2560 x 1920     TIFF 3 MB
  320 x 240         JPEG 22 KB


SeaWiFS data for the Pacific Ocean with black land    SeaWiFS data for the Pacific Ocean with black land

Available formats:
  2560 x 1920     TIFF 4 MB
  320 x 240         JPEG 23 KB


SeaWiFS data for the world with black land    SeaWiFS data for the world with black land

Available formats:
  2560 x 1920     TIFF 2 MB
  320 x 240         JPEG 18 KB


SeaWiFS data for the Atlantic Ocean with grey land    SeaWiFS data for the Atlantic Ocean with grey land

Available formats:
  2560 x 1920     TIFF 3 MB
  320 x 240         JPEG 21 KB


SeaWiFS data for the Pacific Ocean with grey land    SeaWiFS data for the Pacific Ocean with grey land

Available formats:
  2560 x 1920     TIFF 4 MB
  320 x 240         JPEG 22 KB


SeaWiFS data for the world with grey land    SeaWiFS data for the world with grey land

Available formats:
  2560 x 1920     TIFF 3 MB
  320 x 240         JPEG 18 KB


This color bar gives values for the images demonstrating the difference between CZCS and SeaWiFS data.    This color bar gives values for the images demonstrating the difference between CZCS and SeaWiFS data.

Available formats:
  720 x 486         TIFF 20 KB
  320 x 216         PNG   6 KB


This color bar gives values for the images demonstrating the CZCS data and the SeaWiFS data.    This color bar gives values for the images demonstrating the CZCS data and the SeaWiFS data.

Available formats:
  720 x 486         TIFF 21 KB
  320 x 216         PNG   6 KB

Animation Number:2497
Animator:Joycelyn Thomson (Lead)
Studio:SVS
Completed:2002-07-30
Scientist:Watson Gregg (NASA/GSFC)
Instruments:Nimbus-7/CZCS
 SeaStar/SeaWiFS
Data Collected:CZCS (1979-1986), SeaWiFS (1997-2000)
Keywords:
DLESE >> Biological oceanography
DLESE >> Chemical oceanography
SVS >> Chlorophyll
DLESE >> Ecology
DLESE >> Hydrology
SVS >> Plankton
GCMD >> Location >> Atlantic Ocean
GCMD >> Location >> Pacific Ocean
This work has been visible on
Aviation Week and Space Technology, Aug. 19, 2002 issue, p. 17
 
 
Please give credit for this visualization to
NASA/Goddard Space Flight Center, The SeaWiFS Project and GeoEye, Scientific Visualization Studio. NOTE: All SeaWiFS images and data presented on this web site are for research and educational use only. All commercial use of SeaWiFS data must be coordinated with GeoEye (http://www.geoeye.com).


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