首页|The Observed Near-Surface Energy Exchange Processes over Arctic Glacier in Summer
The Observed Near-Surface Energy Exchange Processes over Arctic Glacier in Summer
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国家科技期刊平台
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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 en-ergy exchange processes over the Arctic glacier surface were analyzed by using observational data obtained in sum-mer 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 oc-curred 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 clas-sical 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.
Department of Lower Atmospheric Observation and Research,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China
Department of Weather Forecast,Aviation Meteorological Centre of Air Traffic Management Bureau,Civil Aviation Administration of China,Beijing 100015,China
A.M.Obukhov Institute of Atmospheric Physics,Russian Academy of Sciences(RAS),Moscow 119017,Russian Federation
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National Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaSecond Tibetan Plateau Scientific Expedition and Research(STEP)ProgramNational Natural Science Foundation of ChinaPlanning Project of Institute of Atmospheric Physics,Chinese Academy of Sciences
国家科技期刊平台
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