Variation in the surface heat flux on the north and south slopes of Mount Qomolangma  

作　　者：Yonghao Jiang Maoshan Li Yuchen Liu Ting Wang Pei Xu Yaoming Ma Fanglin Sun 

机构地区：[1]School of Atmospheric Sciences/Plateau Atmosphere and Environment Key Laboratory of Sichuan Province/Chengdu Plain Urban Meteorology and Environment Observation and Research Station of Sichuan Province,Chengdu University of Information Technology,Chengdu,China [2]Key Laboratory of Tibetan Environment Changes and Land Surface Processes,Institute of Tibetan Plateau Research,Chinese Academy of Sciences,CAS Center for Excellence in Tibetan Plateau Earth Sciences,Beijing,China [3]Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions,Chinese Academy of Sciences,Lanzhou,China

出　　处：《Atmospheric and Oceanic Science Letters》2024年第5期28-33,共6页大气和海洋科学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China[grant number 42230610];the Second Tibetan Plateau Scientific Expedition and Research(STEP)program[grant number 2019QZKK0103];the Natural Science Foundation of Sichuan Province[grant number 2022NSFSC0217];the Scientific Research Project of Chengdu University of Information Technology[grant number KYTZ201721].

摘　　要：The distinctive conditions present on the north and south slopes of Mount Qomolangma,along with the intricate variations in the underlying surfaces,result in notable variations in the surface energy flux patterns of the two slopes.In this paper,data from TESEBS(Topographical Enhanced Surface Energy Balance System),remote sensing data from eight cloud-free scenarios,and observational data from nine stations are utilized to examine the fluctuations in the surface heat flux on both slopes.The inclusion of MCD43A3 satellite data enhances the surface albedo,contributing to more accurate simulation outcomes.The model results are validated using observational data.The RMSEs of the net radiation,ground heat,sensible heat,and latent heat flux are 40.73,17.09,33.26,and 30.91 W m^(−2),respectively.The net radiation flux is greater on the south slope and exhibits a rapid decline from summer to autumn.Due to the influence of the monsoon,on the north slope,the maximum sensible heat flux occurs in the pre-monsoon period in summer and the maximum latent heat flux occurs during the monsoon.The south slope experiences the highest latent heat flux in summer.The dominant flux on the north slope is sensible heat,while it is latent heat on the south slope.The seasonal variations in the ground heat flux are more pronounced on the south slope than on the north slope.Except in summer,the ground heat flux on the north slope surpasses that on the south slope.珠穆朗玛峰南北坡独特的地形条件和复杂的下垫面,导致了南北坡地表通量分布的显著差异.本文利用地形增强地表能量平衡模式(Topographical Enhanced Surface Energy Balance System(TESEBS)),遥感数据和站点观测数据,对季风和非季风期南北坡的地表热通量变化进行了研究.首先,把MCD43A3卫星数据加入TESEBS,改进了地表反照率,使模拟结果更准确.受季风影响,北坡季风期感热通量最大值出现在季风前期,潜热通量最大值出现在季风期.南坡季风期潜热通量最大.全年北坡以感热交换为主,南坡以潜热交换为主,土壤热通量的季节变化在南坡比北坡更明显.

关 键 词：Mount Qomolangma TESEBS model Remote sensing retrieval Surface heat fluxes 

分 类 号：P423[天文地球—大气科学及气象学]