Cloud Reflectance Characteristics in the Presence of Variable Dimethylsulfide (DMS) Sources

Abstract

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.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1989
Accession Number
ADA222806

Entities

People

  • Greg A. Eisman

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Advanced Electronics
  • Materials and Manufacturing Processes
  • Sensors
  • Space

DTIC Thesaurus Topics

  • Acquisition
  • Climate Change
  • Cloud Physics
  • Clouds
  • Composite Images
  • Data Acquisition
  • Data Processing
  • Data Sets
  • Images
  • Meteorology
  • Optical Properties
  • Phase Diagrams
  • Reflectance
  • Sea Level
  • Solar Radiation
  • Transition Temperature
  • United States Naval Academy

Fields of Study

  • Environmental science

Readers

  • Astronomy/Astrophysics
  • Climatology
  • Coastal Oceanography

Technology Areas

  • AI & ML
  • Space