基于遥感监测的2001—2022年青藏高原积雪变化研究进展  

Study on the Variation of Snow Cover Over the Qinghai-Tibet Plateau During 2001-2022 Based on Remote Sensing

作　　者：拉巴[1] 德吉玉珍 拉巴卓玛[1] 边多 拉珍 Lhaba;Deji-Yuzhen;Lhaba-Droma;Biandor;Lhazhen(Tibet Institute of Plateau Atmospheric and Environmental Sciences,Lhasa 850000,China;Climate Center of Tibet Autonomous Region,Lhasa 850000,China)

机构地区：[1]西藏高原大气环境科学研究所,西藏拉萨850000 [2]西藏自治区气候中心,西藏拉萨850000

出　　处：《高原科学研究》2024年第4期1-12,共12页Plateau Science Research

基　　金：第二次青藏高原综合科学考察研究专项项目(2019QZKK0106)。

摘　　要：文章回顾了卫星遥感积雪监测方法和各类积雪反演产品,归纳总结了利用不同方法和产品分析的青藏高原积雪时空变化特征方面的研究进展,同时利用2001—2022年MODIS积雪覆盖产品,分析了近22年青藏高原积雪覆盖度时空变化特征。结果显示:2001—2022年青藏高原积雪覆盖度均值总体变化不大,近23年平均值为27.37%;青藏高原积雪覆盖的空间分布极不均匀,呈四周山区多、腹地少,两侧多、中间少的分布特征;高原东部积雪变化最显著且主导了整个高原积雪的年际变化;四季中冬季积雪覆盖度增加趋势面积占比最大,秋季和夏季以减少趋势为主;降水和气温变化是影响积雪的重要因素,其中降水影响更为显著。In this paper,satellite remote sensing methods for monitoring snow cover and various snow cover in-version products are reviewed,and the spatial and temporal variation characteristics of snow cover over the Qing-hai-Tibet Plateau(QTP)using different methods and products are summarized.Additionally,the spatial and tem-poral characteristics of snow cover over the QTP are analyzed using MODIS snow cover products from 2001 to 2022.The results show that there is no significant change in the average value of snow cover on the plateau over the 22 years,with a value of 27.37%.The spatial distribution of snow cover on this plateau is highly uneven,showing more snow accumulation in the surrounding mountainous areas compared to the interior,with more snow present on the sides than in the central region.The results also show that snow cover variations in the eastern part of the plateau are the most significant and dominate the interannual variability of snow cover across the en-tire plateau.In terms of seasonal variation of snow cover on the plateau,most areas on the plateau exhibit an in-creasing trend in snow cover during winter,while autumn and summer generally show decreasing trends.Addi-tionally,it was found that precipitation and temperature are important factors affecting snow cover,with precipita-tion having a more pronounced impact.Long-term snow cover monitoring products based on remote sensing tech-nology can provide valuable input parameters for climate change studies,model forecasting,and prediction ef-forts related to the QTP and its affected areas,thereby enhancing the accuracy of forecasts and predictions.

关 键 词：积雪 青藏高原 遥感 

分 类 号：P426.635[天文地球—大气科学及气象学]