气候变化领域集成服务门户(CCPortal): Local evaporation controlled by regional atmospheric circulation in the Altiplano of the Atacama Desert

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DOI	10.5194/acp-21-9125-2021
	Local evaporation controlled by regional atmospheric circulation in the Altiplano of the Atacama Desert
	Lobos-Roco F.; Hartogensis O.; De Arellano J.V.-G.; De La Fuente A.; Muñoz R.; Rutllant J.; Suárez F.
发表日期	2021
ISSN	1680-7316
起始页码	9125
结束页码	9150
卷号	21 期号:11
英文摘要	We investigate the influence of regional atmospheric circulation on the evaporation of a saline lake in the Altiplano (also known as the Andean Plateau) region of the Atacama Desert. For that, we conducted a field experiment in the Salar del Huasco (SDH) basin (135g km east of the Pacific Ocean), in November 2018. The measurements were based on surface energy balance (SEB) stations and airborne observations. Additionally, we simulate the meteorological conditions on a regional scale using the Weather Research and Forecasting Model. Our findings show two evaporation regimes: (1) a morning regime controlled by local conditions, in which SEB is dominated by the ground heat flux (∼0.5 of net radiation), very low evaporation (LvE < 30 Wm-2) and wind speed <1 ms-1; and (2) an afternoon regime controlled by regional-scale forcing that leads to a sudden increase in wind speed (>15 ms-1) and a jump in evaporation to >500 Wm-2. While in the morning evaporation is limited by very low turbulence (u∗∼0.1 ms-1), in the afternoon strong winds (u∗∼0.65 ms-1) enhance mechanical turbulence, increasing evaporation. We find that the strong winds in addition to the locally available radiative energy are the principal drivers of evaporation. These winds are the result of a diurnal cyclic circulation between the Pacific Ocean and the Atacama Desert. Finally, we quantify the advection and entrainment of free-tropospheric air masses driven by boundary layer development. Our research contributes to untangling and linking local- and regional-scale processes driving evaporation across confined saline lakes in arid regions. © 2021 Felipe Lobos-Roco et al.
语种	英语
scopus关键词	air mass; arid region; atmospheric circulation; boundary layer; climate forcing; entrainment; evaporation; heat flux; measurement method; quantitative analysis; regional climate; saline lake; surface temperature; troposphere; wind velocity; Altiplano; Atacama Desert; Chile; Atacama
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246802
作者单位	Meteorology and Air Quality, Wageningen University, Wageningen, Netherlands; Department of Hydraulic and Environmental Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile; Department of Civil Engineering, Universidad de Chile, Santiago, Chile; Department of Geophysics, Universidad de Chile, Santiago, Chile; Centro de Estudios Avanzados en Zonas Áridas, La Serena, Chile; Centro de Desarrollo Urbano Sustentable (CEDEUS), Santiago, Chile; Centro de Excelencia en Geotermia de los Andes (CEGA), Santiago, Chile
推荐引用方式 GB/T 7714	Lobos-Roco F.,Hartogensis O.,De Arellano J.V.-G.,et al. Local evaporation controlled by regional atmospheric circulation in the Altiplano of the Atacama Desert[J],2021,21(11).
APA	Lobos-Roco F..,Hartogensis O..,De Arellano J.V.-G..,De La Fuente A..,Muñoz R..,...&Suárez F..(2021).Local evaporation controlled by regional atmospheric circulation in the Altiplano of the Atacama Desert.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(11).
MLA	Lobos-Roco F.,et al."Local evaporation controlled by regional atmospheric circulation in the Altiplano of the Atacama Desert".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.11(2021).