| 摘要: |
| 采用NOAA/AVHRR资料,对青海湖湖面进行水体判识,并利用线性混合模式对混合象元进行处理,定量估算了近20年青海湖湖水面积并分析了变化趋势,表明近20年青海湖湖水面积在不断减小,每年减少约4km2,并且青海湖干涸部分主要在其北部.进一步采用主成分分析和回归分析方法对青海湖地区降水、气温和蒸发量做了初步气候分析,表明青海湖地区降水减少、气温升高、蒸发量增加是青海湖湖水面积逐年减少的主要原因. |
| 关键词: 青海湖 湖水面积减小 混合象元 气候分析 |
| DOI：10.18307/2008.0121 |
| 分类号: |
| 基金项目:国家自然科学基金项目(90102010)资助. |
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| Area changes of Lake Qinghai in the latest 20 years based on remote sensing study |
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LIU Ruixia, LIU Yujie
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Key Laboratory of Radiometric Calibration and Validation for Environmental Satellite, China Meteorological Adminisration National Satellite Meteorological Center, Beijing 100081, P. R. China
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| Abstract: |
| The water areas of Lake Qinghai in the past twenty years have been identified using NOAA/AVHRR satellite data. Theresults show that the area of Lake Qinghai has been decreased in these years, and the area of decreasing is mainly in the north of LakeQinghai. To find out the climate elements which affect the area of Lake Qinghai, precipitation, temperature and evaporation in theregion of Lake Qinghai are analyzed. The results show that increasing in temperature and evaporation, and the decreasing inprecipitation are the main reasons for the decreasing in the area of Lake Qinghai. |
| Key words: Lake Qinghai area decreasing mixed pixel climate analysis |
