2000-2011年可可西里地区主要湖泊冰情时空变化（英文）

编号 zgly0001584310

文献类型 期刊论文

文献题名 2000-2011年可可西里地区主要湖泊冰情时空变化（英文）

作者 姚晓军  李龙  赵军  孙美平  李净  宫鹏  安丽娜 

作者单位 CollegeofGeographyandEnvironmentSciences  NorthwestNormalUniversity  LanzhouResources&EnvironmentVoc-TechCollege  StateKeyLaboratoryofCryosphereSciences  ColdandAridRegionsEnvironmentalandEngineeringResearchInstitute  CAS 

母体文献 Journal of Geographical Sciences 

年卷期 2016年01期

年份 2016 

分类号 P333 

关键词 lakeice  phenology  climatechange  HohXilregion  TibetanPlateau 

文摘内容 Lake ice phenology,i.e.the timing of freeze-up and break-up and the duration of the ice cover,is regarded as an important indicator of changes in regional climate.Based on the boundary data of lakes,some moderate-high resolution remote sensing datasets including MODIS and Landsat TM/ETM+ images and the meteorological data,the spatial-temporal variations of lake ice phenology in the Hoh Xil region during the period 2000–2011 were analyzed by using RS and GIS technology.And the factors affecting the lake ice phenology were also identified.Some conclusions can be drawn as follows.(1) The time of freeze-up start(FUS) and freeze-up end(FUE) of lake ice appeared in the late October–early November,mid-November – early December,respectively.The duration of lake ice freeze-up was about half a month.The time of break-up start(BUS) and break-up end(BUE) of lake ice were relatively dispersed,and appeared in the early February – early June,early May – early June,respectively.The average ice duration(ID) and the complete ice duration(CID) of lakes were 196 days and 181 days,respectively.(2) The phenology of lake ice in the Hoh Xil region changed dramatically in the last 10 years.Specifically,the FUS and FUE time of lake ice showed an increasingly delaying trend.In contrast,the BUS and BUE time of lake ice presented an advance.This led to the reduction of the ID and CID of lake.The average rates of ID and CID were –2.21 d/a and –1.91 d/a,respectively.(3) The variations of phenology and evolution of lake ice were a result of local and climatic factors.The temperature,lake area,salinity and shape of the shoreline were the main factors affecting the phenology of lake ice.However,the other factors such as the thermal capacity and the geological structure of lake should not be ignored as well.(4) The spatial process of lake ice freeze-up was contrary to its break-up process.The type of lake ice extending from one side of lakeshore to the opposite side was the most in the Hoh Xil region.