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  • METEOROLOGY AND CLIMATOLOGY  (2)
  • 2005-2009
  • 1975-1979  (2)
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  • 1
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    A hydrological analysis of east Australian floods using Nimbus-5 electrically scanning radiometer data (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The chronological development and diminution of six floods in eastern Australia during January, February, and March 1974 were mapped for the first time by the Nimbus Electrically Scanning Microwave Radiometer (ESMR). Day and nighttime ESMR (19.35 GHz) coverage was analyzed for the low gradient, flooded Darling River system in New South Wales. Apparent movement of surface water as indicated by low brightness temperatures (less than 250 K, day and less than 240 K, night) was easily followed around the curved runoff basin along the northern shoreline of the flooded Darling River during this 3-month period. This pattern was in good agreement with flood crest data at selected river height gage stations, even under cloudy conditions.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: American Meteorological Society; vol. 60
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Studies of snowpack properties by passive microwave radiometry (1979)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Research involving the microwave characteristics of snow was undertaken in order to expand the information content currently available from remote sensing, namely the measurement of snowcovered area. Microwave radiation emitted from beneath the snow surface can be sensed and thus permits information on internal snowpack properties to be inferred. The intensity of radiation received is a function of the average temperature and emissivity of the snow layers and is commonly referred to as the brightness temperature (T sub B). The T sub B varies with snow grain and crystal sizes, liquid water content, and snowpack temperature. The T sub B of the 0.8 cm wavelength channel was found to decrease more so with increasing snow depth than the 1.4 cm channel. More scattering of the shorter wavelength radiation occurs thus resulting in a lower T sub B for shorter wavelengths in a dry snowpack. The longer 21.0 cm wavelength was used to assess the condition of the underlying ground.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 4th NASA Weather and Climate Program Sci. Rev.; p 209-215
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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