| 古尔班通古特沙漠植被覆盖变化及其对沙尘天气的影响 |
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| 引用本文： | 李杨,刘艳,张璞.古尔班通古特沙漠植被覆盖变化及其对沙尘天气的影响[J].干旱区资源与环境,2010(3). |
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| 作者姓名： | 李杨 刘艳 张璞 |
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| 作者单位： | 中国气象局乌鲁木齐沙漠气象研究所; |
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| 基金项目： | 科技部公益性行业科研专项(GYHY200706008);;中国沙漠气象科学研究基金(sqj2007009);;国家重点基础研究发展计划(973计划)(2006CB701305)共同资助 |
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| 摘 要： | 利用1981～2003年逐月NOAA/AVHRR NDVI时间序列数据,分析了古尔班通古特沙漠荒漠植被覆盖的动态变化及其对沙漠南缘绿洲沙尘天气的影响。结果表明:近23年来古尔班通古特沙漠覆盖面积总体上呈现增加趋势,植被覆盖程度较高的区域分布在沙漠中部和西部,同时,这里也是23年来植被覆盖程度显著增加的区域;春、夏季植被覆盖与沙尘天气日数之间均呈现负相关关系,其中,夏季植被覆盖程度与沙尘天气日数之间的负相关最为显著。这说明在古尔班通古特沙漠植被覆盖程度与其南缘绿洲沙尘日数间存在负耦合关系,植被覆盖是影响沙尘天气发生及其强度的因子之一。
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| 关 键 词： | NDVI 植被覆盖 古尔班通古特沙漠 沙尘天气 |
Desert vegetation coverage changes and their impacts on sand-dust weather in Gurbantonggut Desert |
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| LI Yang,LIU Yan,ZHANG Pu.Desert vegetation coverage changes and their impacts on sand-dust weather in Gurbantonggut Desert[J].Journal of Arid Land Resources and Environment,2010(3). |
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| Authors: | LI Yang LIU Yan ZHANG Pu |
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| Institution: | Institute of Desert Meteorological;China Meteorological Administration;Urumqi 830002;P.R.China |
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| Abstract: | Using a time series of NOAA/AVHRR NDVI during 1981~2003,we analyzed Gurbantonggut desert vegetation coverage changes and their impacts on oasis sand-dust weather on the southern border.It was found that:1) Gurbantonggut desert has an overall trend of coverage increase in recent 20 years.2) Large area of vegetation coverage is in the central and western Gurbantonggut,where vegetation coverage has been increasing apparently since 23 years.3) Vegetation coverage has a negative correlation with days of sand-dus... |
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| Keywords: | NDVI vegetation coverage Gurbantonggut desert sand-dust weather |
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