The Observed Near-Surface Energy Exchange Processes over Arctic Glacier in Summer  

作　　者：Libo ZHOU Jinhuan ZHU Linlin KONG Peng LI Shupo MA Fei LI Han ZOU Meigen ZHANG Irina REPINA 

机构地区：[1]Department of Lower Atmospheric Observation and Research,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing,100029,China [2]State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing,100029,China [3]Department of Weather Forecast,Aviation Meteorological Centre of Air Traffic Management Bureau,Civil Aviation Administration of China,Beijing,100015,China [4]A.M.Obukhov Institute of Atmospheric Physics,Russian Academy of Sciences(RAS),Moscow,119017,Russian Federation

出　　处：《Journal of Meteorological Research》2024年第3期600-607,共8页气象学报（英文版）

基　　金：Supported by the National Key Research and Development Program of China(2022YFC2807203 and 2022YFC3702001-03);Second Tibetan Plateau Scientific Expedition and Research(STEP)Program(2019QZKK0105);National Natural Science Foundation of China(41830968);Planning Project of Institute of Atmospheric Physics,Chinese Academy of Sciences(E268091801).

摘　　要：Under Arctic warming,near-surface energy transfers have significantly changed,but few studies have focused on energy exchange over Arctic glacier due to limitations in available observations.In this study,the atmospheric energy exchange processes over the Arctic glacier surface were analyzed by using observational data obtained in summer 2019 in comparison with those over the Arctic tundra surface.The energy budget over the glacier greatly differed from that over the tundra,characterized by less net shortwave radiation and downward sensible heat flux,due to the high albedo and icy surface.Most of the incoming solar radiation was injected into the glacier in summer,leading to snow ice melting.During the observation period,strong daily variations in near-surface heat transfer occurred over the Arctic glacier,with the maximum downward and upward heat fluxes occurring on 2 and 6 July 2019,respectively.Further analyses suggested that the maximum downward heat flux is mainly caused by the strong local thermal contrast above the glacier surface,while the maximum upward heat transfer cannot be explained by the classical turbulent heat transfer theory,possibly caused by countergradient heat transfer.Our results indicated that the near-surface energy exchange processes over Arctic glacier may be strongly related to local forcings,but a more in-depth investigation will be needed in the future when more observational data become available.

关 键 词：ARCTIC GLACIER TUNDRA energy exchange processes 

分 类 号：P941.62[天文地球—自然地理学] P343.6P412