气候变化领域集成服务门户(CCPortal): Lake surface water-heat flux variation and its correlations with meteorological factors on multiscale in the Yamzhog Yumco, south Tibet

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DOI	10.1007/s11442-024-2210-6
	Lake surface water-heat flux variation and its correlations with meteorological factors on multiscale in the Yamzhog Yumco, south Tibet
	Zhang, Xueqin; Jin, Zheng; Shen, Pengke; Zheng, Du
发表日期	2024
ISSN	1009-637X
EISSN	1861-9568
起始页码	397
结束页码	414
卷号	34 期号:2
英文摘要	Lake surface water-heat exchange and its climatic attribution critically influence alpine lakes' evaporation mechanism and water storage balance with climate change. Here, this paper first explored the hourly, daily, and monthly water-heat flux variations of the lake surface and their correlations with meteorological factors based on the eddy covariance turbulent flux observation over the Yamzhog Yumco, an alpine lake in south Tibet in the non-freezing period (April-December) in 2016 and 2017. We found that the average latent heat flux was much higher than the sensible heat flux on the lake surface from April to December. Meanwhile, the water-heat flux exhibited remarkable seasonal variation, with a prominent role of higher air temperature and humidity in summer jointly controlling the lake-air energy exchange. Moreover, the main controlling meteorological factors for the water-heat flux variation of the lake surface differed with diversified timescales. First, the lake-air temperature difference was the most significant meteorological factor related to sensible heat flux on the half-hourly, daily, and monthly timescales. Second, the latent heat flux was strongly positively correlated with wind speed and the synergies of wind speed and water vapor pressure deficit on the daily and half-hourly timescales. Third, the lake surface heat flux was significantly negatively correlated with net radiation flux on the daily and monthly scales. The negative correlation can be attributed to the seasonal variation of the water surface net radiation, and the phase difference in heat flux intensity caused by the lake-air temperature difference and heat capacity contrast. Our findings will hopefully improve the understanding of energy exchange and evaporation mechanisms for alpine lakes in a warming climate.
关键词	lake surface water-heat flux meteorological factor eddy covariance alpine lakes Yamzhog Yumco
英文关键词	NAM CO BASIN; TURBULENT FLUX; SHALLOW LAKE; ENERGY FLUX; VAPOR; SIMULATION; PLATEAU; CYCLE; AREA
WOS研究方向	Geography, Physical
WOS记录号	WOS:001148756600003
来源期刊	JOURNAL OF GEOGRAPHICAL SCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283295
作者单位	Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Fudan University; China Meteorological Administration
推荐引用方式 GB/T 7714	Zhang, Xueqin,Jin, Zheng,Shen, Pengke,et al. Lake surface water-heat flux variation and its correlations with meteorological factors on multiscale in the Yamzhog Yumco, south Tibet[J],2024,34(2).
APA	Zhang, Xueqin,Jin, Zheng,Shen, Pengke,&Zheng, Du.(2024).Lake surface water-heat flux variation and its correlations with meteorological factors on multiscale in the Yamzhog Yumco, south Tibet.JOURNAL OF GEOGRAPHICAL SCIENCES,34(2).
MLA	Zhang, Xueqin,et al."Lake surface water-heat flux variation and its correlations with meteorological factors on multiscale in the Yamzhog Yumco, south Tibet".JOURNAL OF GEOGRAPHICAL SCIENCES 34.2(2024).