Variation Characteristics of Snowfall in Tibetan Plateau Based on Multi-Source Data Fusion
Snowfall,as an integral part of the water cycle in the Tibetan Plateau,plays an irreplaceable role in maintaining the balance of re-gional water resources and ecological balance.However,with the intensification of global warming,the characteristics of snowfall change in the Tibetan Plateau region not only pose challenges to the stability of the regional climate but also raise new issues for water resource manage-ment and ecological environment protection.To deeply understand the spatiotemporal characteristics of snowfall changes in the Tibetan Pla-teau and their response to climate change,this study selected six representative basins,namely the Lhasa River,Nianchu River,Naqu Riv-er,the source of the Yangtze River,the source of the Yellow River,and the source of the Lancang River,as research objects.The aim is to reveal the spatiotemporal variation patterns of snowfall in the Tibetan Plateau during this period through multi-source remote sensing precipi-tation data fusion technology.This study selected three types of gridded precipitation data:CMFD,CPC,and TRMM,and constructed an evaluation index for precipitation data based on overall deviation and deviation components to assess the accuracy and optimize the integra-tion of these data.The results show that from 2002 to 2018,the snowfall rate in the typical basins of the Tibetan Plateau generally showed a downward trend,especially in areas above an altitude of 5 000 meters,where the reduction in snowfall rate was more significant.The ranking of the decrease in snowfall rate from large to small is:Lhasa River(28.2%),the source of the Yellow River(18.2%),the source of the Yangtze River(17.8%),Nianchu River(15.4%),the source of the Lancang River(12.1%),and Naqu River(10.5%).This downward trend shows a spatial distribution feature that intensifies gradually from south to north.This finding is closely related to global warming and provides important scientific evidence for understanding the response of the Tibetan Plateau to climate change.In addition,this study has im-portant reference value for the formulation of water resource management and climate change adaptation strategies in the Tibetan Plateau re-gion,and also provides data support and research methods for related fields,which helps to promote the in-depth development of climate change research in the Tibetan Plateau.
Tibetan Plateausnowfall variationmulti-source data fusionspatiotemporal characteristics
万方数据
维普
