Upwelling events are characterized by relatively lower sea
surface temperatures and higher chlorophyll levels compared to
Chlorophyll and water temperatures are each associated with
characteristic electromagnetic radiance signatures. Chlorophyll
primarily absorbs blue and red wavelengths of light while reflecting
other wavelengths, thereby appearing green in color. Temperature is
associated with different emissions of infrared radiation.
Satellite sensors have been developed that can detect and
report the patterns of electromagnetic energy that are being
radiated from the earth's surface across the electromagnetic
spectrum. By evaluating key wavelengths reported by these sensors,
both sea surface chlorophyll levels and temperatures can therefore
be monitored by satellite.