Relationship between Soil Moisture Content and Thermal Infrared Emissivity of the Sand Sampled in Muus Desert, China.

DOI

Bibliographic Information

Other Title
  • 中国モウス砂漠で採取された砂丘砂の土壌水分量と熱赤外域分光放射率との関係

Abstract

Thermal infrared emissivity of sand, sampled in the Muus Desert in China, have been measured under controlled soil moisture content in order to obtain quantitative relationship between soil moisture arid spectral emissivity. Spectral emissivity of the dried sand, which contains large amounts of quartz and feldspar, shows a depression in the 8-10μm range. However, the emissivity increases in the 8-10μm range when there is an increase in the soil moisture content, and no changes are observed in the 11-13μm range. In some cases, however, this phenomenon is not clear because of temperature estimation error in the sample.<BR>An error of 1°K in temperature estimate causes about a 2% emissivity error and less than 0.5% error in the emissivity ratio in the thermal infrared. The emissivity ratio of averaged ASTER TIR channels (10, 11, 12):(13, 14) is proposed to be an indicator of the soil moisture content. This ratio increases by about 3% with increase in moisture content from 0 to 2% in weight.

Journal

Details 詳細情報について

  • CRID
    1390001204667366784
  • NII Article ID
    130003638485
  • DOI
    10.11440/rssj1981.17.322
  • ISSN
    18831184
    02897911
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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