Characteristics of Energy Fluxes and Cold Frontal Effects on Energy Exchange over a Boreal Lake
作者机构：State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric ChemistryInstitute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of SciencesBeijing 100864China Department of Atmospheric SciencesYunnan UniversityKunming 650091China Institute for Atmospheric and Earth System Research/PhysicsFaculty of ScienceUniversity of HelsinkiHelsinki 00014Finland
出 版 物：《Advances in Atmospheric Sciences》 (大气科学进展(英文版))
年 卷 期：2025年第42卷第2期
页 面：357-372页
核心收录：
基 金：supported by funds from the National Natural Science Foundation of China(Grant Nos:42275079,41975017,42411530052,and 42161144010) the Second Tibetan Plateau Scientific Expedition and Research(STEP)program(Grant No.2019QZKK0105)
主 题：sensible heat flux latent heat flux roughness length bulk transfer coefficient cold front
摘 要：Understanding the characteristics and variations of heat exchange and evaporation of lakes is important for regional water resource management and sustainable *** on eddy covariance measurements over Lake Vanajavesi in southern Finland,characteristics of energy fluxes and cold frontal effects on energy exchange were *** lake acted as a heat sink in spring and summer and a heat source in *** latent heat flux reached its minimum value in the morning and peaked in the *** diurnal variation of sensible heat flux was opposite to that of latent heat *** factors for the sensible heat flux were mainly the lake-air temperature difference and the product of lake-air temperature difference and wind *** latent heat flux was mainly affected by the vapor pressure deficit and the product of vapor pressure deficit and wind *** annual mean values of bulk transfer coefficients for momentum,heat,and water vapor were 1.98×10^(-3),1.62×10^(-3),and 1.31×10^(-3),*** transfer coefficients for heat and water vapor were not equal,indicating that the parameterization of energy exchange in numerical models,where the assumption that the heat coefficient equals the water vapor coefficient needs *** the ice-free season,cold fronts resulted in 28 sensible heat pulses and 17 latent heat pulses,contributing to 50.59%and 34.89%of sensible and latent heat exchange in Lake *** results indicate that cold fronts significantly impact the surface energy budget and evaporation over lakes.
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