GSTDTAP  > 资源环境科学
DOI10.1029/2018WR024072
Quantification and Prediction of Nighttime Evapotranspiration for Two Distinct Grassland Ecosystems
Groh, J.1,2; Puetz, T.1; Gerke, H. H.2; Vanderborght, J.1; Vereecken, H.1
2019-04-01
发表期刊WATER RESOURCES RESEARCH
ISSN0043-1397
EISSN1944-7973
出版年2019
卷号55期号:4页码:2961-2975
文章类型Article
语种英语
国家Germany
英文摘要

Evapotranspiration (ET) is, after precipitation, the second largest flux at the land surface in the water cycle and occurs mainly during daytime. Less attention has been given to water fluxes from the land surface into the atmosphere during nighttime (i.e., between sunset and sunrise). The nighttime ET (ETN ) may be estimated based on models that use meteorological data; however, due to missing experimental long-term data, the verification of ETN estimates is limited. In this paper, the amount of ETN for two grassland ecosystems was determined from highly temporally resolved and precise weighing lysimeter data. We found that annual ETN ranged between 3.5% and 9.5% of daytime annual ET (ETD) and occurred mainly during wet soil and canopy surface conditions, which suggests that ETN is largely related to evaporation. ETN was positively correlated with wind speed. Dew formation, ranging from 4.8% to 6.4% of annual precipitation, was in absolute terms larger than ETN. The prediction of ETN with the Penman-Monteith model improved if the aerodynamic and surface resistance parameters were based on vegetation height observations and the nighttime stomatal resistance parameter was assumed to be zero. The occurrence of hot days during the observation period showed to increase average ETN rates. Our results suggest that ETN can be observed with precision weighing lysimeters, was a not negligible component in the water balance of the grassland ecosystems, and thus needs more attention when simulating land surface hydrological processes.


领域资源环境
收录类别SCI-E
WOS记录号WOS:000468597900022
WOS关键词WATER-USE EFFICIENCY ; BOUNDARY-LAYER ; HEAT WAVES ; SAP FLOW ; STOMATAL CONDUCTANCE ; ALPINE GRASSLAND ; EDDY COVARIANCE ; FILTER ROUTINE ; TRANSPIRATION ; LYSIMETER
WOS类目Environmental Sciences ; Limnology ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/182227
专题资源环境科学
作者单位1.Forschungszentrum Julich, Inst Bio & Geosci IBG Agrospnere 3, Julich, Germany;
2.Leibniz Ctr Agr Landscape Res ZALF, Res Area Landscape Functioning 1, Working Grp Hydropedol, Muncheberg, Germany
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GB/T 7714
Groh, J.,Puetz, T.,Gerke, H. H.,et al. Quantification and Prediction of Nighttime Evapotranspiration for Two Distinct Grassland Ecosystems[J]. WATER RESOURCES RESEARCH,2019,55(4):2961-2975.
APA Groh, J.,Puetz, T.,Gerke, H. H.,Vanderborght, J.,&Vereecken, H..(2019).Quantification and Prediction of Nighttime Evapotranspiration for Two Distinct Grassland Ecosystems.WATER RESOURCES RESEARCH,55(4),2961-2975.
MLA Groh, J.,et al."Quantification and Prediction of Nighttime Evapotranspiration for Two Distinct Grassland Ecosystems".WATER RESOURCES RESEARCH 55.4(2019):2961-2975.
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