AVI法の黄砂検出特性に関する検討
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概要
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The properties of detection of dust and sandstorms (DSS) by AVI method are examined. The aerosol vapor index (AVI) is defined as AVI=T12-T11, where T12 and T11 are the brightness temperatures respectively at 12μm and 11μm wave length. MODIS data of Terra/Aqua satellites from China to Japan in April 2006 are used. The T11 vs AVI scatter charts in narrow regions are made. Referring to the simulation result by Gu et. al., it is shown that the larger AVI value is, the larger the optical thickness of DSS is, in the case of narrow region on land and sea with DSS that does not include cloud. The AVI value decreases, in the case of narrow region with DSS that includes cloud.
- 2010-06-30
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