2012 Fiscal Year Final Research Report
Clarification on the relationships between soil and land surface conditions and threshold wind speeds for aeolian dust generation aimed at the evaluation of wide-area wind erosion
| Project/Area Number |
21710031
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Environmental impact assessment/Environmental policy
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| Research Institution | Tottori University |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2012
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| Keywords | 風食 / 砂漠化 / ダスト / 黄砂 / 気候変動 / 気象災害 / 土地利用 |
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| Research Abstract |
We investigated the cause of frequent dust events in East Asia since 2000. We developed a methodology to statistically estimate a threshold wind speed for dust generation using meteorological observatory data, and we employed this threshold speed as an index of soil and land surface conditions. We clarified that a major cause of increased dust events is a desertification (i.e., a decrease of threshold speed) in Mongolia, eastern Inner Mongolian and the northeastern China from an analysis of dust generation frequeny, strong wind frequency, and threshold speed.
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