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Time evolution of surface chlorophyll patterns from cross-spectrum analysis of satellite color imagesThe rate of decorrelation of surface chlorophyll patterns as a function of the time separation between pairs of images was determined from two sequences of CZCS images of the Pacific Ocean area adjacent to Vancouver Island, Canada; cloud-free subareas were selected that were common to several images separated in time by 1-17 days. Image pairs were subjected to two-dimensional autospectrum and cross-spectrum analysis in an array processor, and squared coherence estimates found for several wave bands were plotted against time separation, in analogy with a time-lagged cross correlation function. It was found that, for wavelengths of 50-150 km, significant coherence was lost after 7-10 days, while for wavelengths of 25-50 km, significant coherence was lost after only 5-7 days. In both cases, offshore regions maintained coherence longer than coastal regions.
Document ID
19880055219
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Denman, Kenneth L.
(Department of Fisheries and Oceans Institute of Ocean Sciences, Sidney, Canada)
Abbott, Mark R.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena; California, University La Jolla, United States)
Date Acquired
August 13, 2013
Publication Date
June 15, 1988
Publication Information
Publication: Journal of Geophysical Research
Volume: 93
ISSN: 0148-0227
Subject Category
Oceanography
Accession Number
88A42446
Distribution Limits
Public
Copyright
Other

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