Cloud Reflectance Characteristics in the Presence of Variable Dimethylsulfide (DMS) Sources
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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Oceanic dimethylsulfide DMS sources are inferred from silicon anomaly information in the Denmark Strait during June 1984. This June 1984 bloom of the phytoplankton species Phaecystes pouchetti, a known DMS producer, is compared to the non-bloom of June 1982 using NOAA-7 AVHRR data from channel 1 .63 microns, channel 3 3.7 microns and channel 4 11.0 microns wavelengths. After examining the AVHRR color-enhanced data for each individual day, composites for June 1982 and June 1984 are created for channel 1 and channel 3 wavelengths. These composites eliminated day-to-day differences in reflectances by averaging data which were neither cloud-free nor high-cloud contaminated. Based on these composites, evidence is presented which suggests that a correlation exists between inferred-DMS source regions and higher reflectance values at channel 3 wavelengths. Keywords DMS, Silicon anomaly, Satellite imagery, Atmospheric physics.
- Atmospheric Physics