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  • EARTH RESOURCES AND REMOTE SENSING  (2)
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  • 1
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    Remote sensing of global snowpack energy and mass balance: In-situ measurements on the snow of interior and Arctic Alaska (1994)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This project is continuing along the lines of the semiannual report dated January 1993. Four major tasks have been addressed: analysis of variability in the seasonal snow of interior and arctic Alaska, the interpretation of microwave brightness temperature across Alaska on transects from south to north, study of nonclimatic controls which affect glaciers, and the location of glacier facies boundaries.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-195704 , NAS 1.26:195704
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Remote sensing of global snowpack energy and mass balance: In-situ measurements on the snow of interior and Arctic Alaska (1989)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Observations led to a study of the physical properties of snow and the processes which operate on it. These observations included microwave brightness temperatures in interior Alaska which revealed: (1) up to three times more variability from one cell (1/2 degree latitude x 1/2 degree longitude) to the next in winter than in summer (5 to 15 K in winter and about 5 K in summer); (2) the overall range of temperature from week to week is about seven times greater in winter than in summer; (3) the microwave brightness temperature is about 25 K less than air temperature during summer but 35 to 60 K less during winter; and (4) the presence of snow cover appears to contribute to increasing the difference between air temperature and brightness temperature. The role of irregular substrate under the snow in enhancing convection has been studied with particular attention to variations in snow cover on water surfaces and in forested regions. LANDSAT imagery has been obtained to prepare a classification of ground surface types of the area. The extreme conditions of the 1988 to 1989 winter are discussed with respect to comparing the microwave data sets from 1985, and before, up to the present. The use of the Mt. Wrangell area as aerial photogrammetric controls for glacier measurements is given attention.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-180078 , NAS 1.26:180078
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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