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  • OCEANOGRAPHY  (3)
  • Isoptera
  • 1980-1984  (3)
  • 1983  (1)
  • 1980  (2)
  • 1
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    Satellites for the study of ocean primary productivity (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The use of remote sensing techniques for obtaining estimates of global marine primary productivity is examined. It is shown that remote sensing and multiplatform (ship, aircraft, and satellite) sampling strategies can be used to significantly lower the variance in estimates of phytoplankton abundance and of population growth rates from the values obtained using the C-14 method. It is noted that multiplatform sampling strategies are essential to assess the mean and variance of phytoplankton biomass on a regional or on a global basis. The relative errors associated with shipboard and satellite estimates of phytoplankton biomass and primary productivity, as well as the increased statistical accuracy possible from the utilization of contemporaneous data from both sampling platforms, are examined. It is shown to be possible to follow changes in biomass and the distribution patterns of biomass as a function of time with the use of satellite imagery.
    Keywords: OCEANOGRAPHY
    Type: (ISSN 0273-1177)
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Nimbus-7 coastal zone color scanner - System description and initial imagery (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Initial imagery from the Nimbus-7 Coastal Zone Color Scanner (CZCS) shows subtle variations in water color. Organisms, especially phytoplankton, play a major influence on the variations in water color. Processing of the visual data is described, and in particular, the use of an algorithm to remove aerosol from the image is discussed. Data on the six spectral bands (433-12,500 nm) are presented and comparisons are made between the CZCS and the Landsat-1 multispectral scanner. The implications for management of fisheries is noted.
    Keywords: OCEANOGRAPHY
    Type: Science; 210; Oct. 3
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Upwelled spectral radiance distribution in relation to particulate matter in sea water (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Spectral analysis of water color and concurrent measurements of the relative concentration of various particulate and dissolved constituents within a broad range of water types are necessary to quantify ocean color observations and successfully relate them to various biological and physical processes that can be monitored by remote sensing. Some of the results of a Nimbus-G prelaunch cruise in connection with the Coastal Zone Color Scanner (CZCS) experiment, which was carried out in the Gulf of Mexico in October 1977, are presented and discussed. Based upon a small but diverse sample of near-surface measurements, it appears possible to estimate total suspended particulate matter (SPM) to useful accuracies by forming ratios of the spectral radiances measured at wavelengths falling near the centers of certain CZCS bands, viz., 440 nm:550 nm and 440 nm:520 nm. Furthermore, the analysis suggests a very high degree of covariation between SPM and phytoplankton pigments except for certain well-defined special cases.
    Keywords: OCEANOGRAPHY
    Format: text
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    NASA TECHNICAL REPORTS
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