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DOI	10.5194/hess-22-6357-2018
	Estimating the effect of rainfall on the surface temperature of a tropical lake
	Gerard Rooney G.; Van Lipzig N.; Thiery W.
发表日期	2018
ISSN	1027-5606
起始页码	6357
结束页码	6369
卷号	22 期号:12
英文摘要	We make use of a unique high-quality, long-term observational dataset on a tropical lake to assess the effect of rainfall on lake surface temperature. The lake in question is Lake Kivu, one of the African Great Lakes, and was selected for its remarkably uniform climate and availability of multi-year over-lake meteorological observations. Rain may have a cooling effect on the lake surface by lowering the near-surface air temperature, by the direct rain heat flux into the lake, by mixing the lake surface layer through the flux of kinetic energy and by convective mixing of the lake surface layer. The potential importance of the rainfall effect is discussed in terms of both heat flux and kinetic energy flux. To estimate the rainfall effect on the mean diurnal cycle of lake surface temperature, the data are binned into categories of daily rainfall amount. They are further filtered based on comparable values of daily mean net radiation, which reduces the influence of radiative-flux differences. Our results indicate that days with heavy rainfall may experience a reduction in lake surface temperature of approximately 0.3 K by the end of the day compared to days with light to moderate rainfall. Overall this study highlights a new potential control on lake surface temperature and suggests that further efforts are needed to quantify this effect in other regions and to include this process in land surface models used for atmospheric prediction. ©Author(s) 2018.
语种	英语
scopus关键词	Heat flux; Kinetic energy; Kinetics; Lakes; Mixing; Rain; Surface properties; Tropics; Atmospheric prediction; Daily rainfall amounts; Lake surface temperature; Land surface models; Meteorological observation; Near surface air temperature; Potential control; Surface temperatures; Atmospheric temperature; air temperature; atmospheric modeling; cooling; energy flux; estimation method; heat flux; lacustrine environment; rainfall; surface layer; surface temperature; East African Lakes; Lake Kivu
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159831
作者单位	Gerard Rooney, G., Met Office, FitzRoy Road, Exeter, EX1 3PB, United Kingdom; Van Lipzig, N., KU Leuven, Department of Earth and Environmental Sciences, Celestijnenlaan 200E, Leuven, 3001, Belgium; Thiery, W., ETH Zurich, Institute for Atmospheric and Climate Science, Universitaetstrasse 16, Zurich, 8092, Switzerland, Vrije Universiteit Brussel, Department of Hydrology and Hydraulic Engineering, Pleinlaan 2, Brussels, 1050, Belgium
推荐引用方式 GB/T 7714	Gerard Rooney G.,Van Lipzig N.,Thiery W.. Estimating the effect of rainfall on the surface temperature of a tropical lake[J],2018,22(12).
APA	Gerard Rooney G.,Van Lipzig N.,&Thiery W..(2018).Estimating the effect of rainfall on the surface temperature of a tropical lake.Hydrology and Earth System Sciences,22(12).
MLA	Gerard Rooney G.,et al."Estimating the effect of rainfall on the surface temperature of a tropical lake".Hydrology and Earth System Sciences 22.12(2018).