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DOI | 10.1002/2016WR019759 |
The complementary relationship between actual and potential evaporation for spatially heterogeneous surfaces | |
Aminzadeh, Milad; Or, Dani | |
2017 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland |
英文摘要 | The Complementary Relationship (CR) between actual and potential evaporation offers an attractive framework for estimating actual evaporation of drying land surfaces from simple meteorological measurements. Land surfaces are often heterogeneous with variable soil types, land cover, and local hydrologic conditions that give rise to spatially variable evaporation dynamics. The main aim is to incorporate effects of spatial heterogeneities on estimates of actual evaporation in the CR framework. The study extends the physically based approach of Aminzadeh et al. (2016) and proposes upscaling schemes for land-atmosphere interactions affecting reference evaporation from heterogeneous surfaces comprised of vegetation and bare soil patches. For small-scale surface heterogeneity relative to the extent of convective boundary layer (CBL), area-averaged atmospheric boundary conditions were imposed over the domain of interest to integrate contributions from patches with different dynamics. For large-scale heterogeneity (large patches relative to the scale of the mean CBL), fluxes from each patch were weighted by their respective areas. Preliminary results are in reasonable agreement with available field measurements and illustrate various effects of heterogeneous surface evaporative fluxes on the CR response. The results also highlight hidden dynamics not captured by standard CR, such as ability of vegetated patches to support steady evaporative fluxes until the onset of water stress while bare soil has already dried out. The study provides new insights into the roles of different vegetation types, land cover fraction, and atmospheric conditions on regional CR behavior hence advancing predictive capabilities of actual evapotranspiration from spatially heterogeneous land surfaces. |
英文关键词 | complementary relationship actual evapotranspiration steady state reference evaporation heterogeneous surfaces bare soil evaporation vegetation patches |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394911200035 |
WOS关键词 | REGIONAL EVAPOTRANSPIRATION ; POROUS SURFACES ; PAN EVAPORATION ; FLUX DENSITIES ; ENERGY-BALANCE ; PINE FOREST ; SOIL ; ADVECTION ; TERRESTRIAL ; TEMPERATURE |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/22046 |
专题 | 资源环境科学 |
作者单位 | Swiss Fed Inst Technol, Dept Environm Syst Sci, Zurich, Switzerland |
推荐引用方式 GB/T 7714 | Aminzadeh, Milad,Or, Dani. The complementary relationship between actual and potential evaporation for spatially heterogeneous surfaces[J]. WATER RESOURCES RESEARCH,2017,53(1). |
APA | Aminzadeh, Milad,&Or, Dani.(2017).The complementary relationship between actual and potential evaporation for spatially heterogeneous surfaces.WATER RESOURCES RESEARCH,53(1). |
MLA | Aminzadeh, Milad,et al."The complementary relationship between actual and potential evaporation for spatially heterogeneous surfaces".WATER RESOURCES RESEARCH 53.1(2017). |
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