Mathematics – Logic
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28..323c&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 2, p. 323-326
Mathematics
Logic
42
Oceanography: General: Climate And Interannual Variability, Oceanography: General: Remote Sensing And Electromagnetic Processes, Oceanography: Physical: Upper Ocean Processes, Oceanography: Biological And Chemical: Trace Elements
Scientific paper
We demonstrate for the first time the detectability of mid-latitude Rossby waves in global ocean color data from the Japanese Ocean Color and Temperature Scanner (OCTS) and U.S. Sea-viewing Wide Field-of-view Sensor (SeaWiFS) radiometers. By producing longitude-time plots of the merged OCTS and SeaWiFS datasets we observe at some latitudes westward propagating signals. Their signature is much weaker than the annual phytoplankton cycle, but can be highlighted by filtering the plots. The main propagating speed is estimated with the Radon Transform and increases equatorward, as expected for Rossby waves. A comparison with both speeds derived from altimeter data and the zonal mean of the speed predicted by a recent theory of Rossby wave propagation shows a broad agreement. We conclude that Rossby waves are sometimes observable in the ocean color field and thus have some effects on biology, and we suggest two simple hypotheses for the underlying interaction mechanism.
Challenor Peter G.
Cipollini Paolo
Cromwell David
Raffaglio Stefano
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