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Sunglint patterns: unusual dark patches.

C J Bowley, J R Greaves, S L Spiegel

Science (New York, N.Y.)

|September 26, 1969

Summary

Anomalous dark areas in satellite images indicate calm seas, potentially signaling upwelling and cold ocean temperatures. These findings are significant for the fishing industry.

Area of Science:

Oceanography
Remote Sensing
Marine Biology

Background:

Satellite imagery occasionally reveals anomalous dark areas in sunglint patterns.
These dark patches correlate with calmer sea surface conditions compared to surrounding areas.

Purpose of the Study:

To investigate the cause of anomalous dark areas observed in sunglint patterns from satellite imagery.
To determine the potential oceanographic and industrial significance of these observations.

Main Methods:

Analysis of photographs from the Applications Technology Satellite.
Correlation of observed dark areas with sea states and water temperatures.

Main Results:

Anomalous dark areas are associated with relatively calm sea surface conditions.

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Evidence suggests the presence of cold water temperatures, indicative of upwelling.

Conclusions:

The observed dark areas in sunglint patterns are reliable indicators of localized calm seas and potential upwelling zones.
These findings have potential importance for the fishing industry by identifying nutrient-rich upwelling areas.