Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR024050 |
Surface Evaporative Capacitance: How Soil Type and Rainfall Characteristics Affect Global-Scale Surface Evaporation | |
Or, D.; Lehmann, P. | |
2019 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:1页码:519-539 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland |
英文摘要 | The separation of evapotranspiration (ET) into its surface evaporation (E) and transpiration (T) components remains a challenge despite its importance for linking water and carbon cycles, for water management, and for attribution of hydrologic isotope fractionation. Regional and global estimates of surface evaporation often rely on estimates of ET (e.g., Penman-Monteith) where E is deduced as a residual or as a fraction of potential evaporation. We propose a novel and direct method for estimating E from soil properties considering regional rainfall characteristics and accounting for internal drainage dynamics. A soil-dependent evaporative characteristic length defines an active surface evaporative capacitor depth below which soil water is sheltered from capillary pull to the evaporating surface. A site-specific evaporative capacitor is periodically recharged by rainfall and discharges at rates determined by interplay between internal drainage and surface evaporation. The surface evaporative capacitor concept was tested using field measurements and subsequently applied to generate a global map of climatic surface evaporation. Latitudinal comparisons with estimates from other global models (e.g., Penman-Monteith method modified by Leuning et al., 2008, [PML]; Moderate Resolution Imaging Spectroradiometer [MODIS]; and Global Land-surface Evaporation: the Amsterdam Methodology [GLEAM]) show good agreement but also point to potential shortcomings of present estimates of surface evaporation. Interestingly, the ratio of surface evaporation (E) to potential evapotranspiration (ET0) is relatively constant across climates, biomes, and soil types with E/ET0<0.15 for 60% of all terrestrial surfaces, in agreement with recent studies. |
英文关键词 | evaporation evapotranspiration soil physics global data |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000459536500029 |
WOS关键词 | TERRESTRIAL EVAPOTRANSPIRATION ; HYDRAULIC CONDUCTIVITY ; POTENTIAL EVAPORATION ; WATER STORAGE ; BARE SOIL ; TRANSPIRATION ; MOISTURE ; MODEL ; VEGETATION ; DRAINAGE |
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/19933 |
专题 | 资源环境科学 |
作者单位 | Swiss Fed Inst Technol, Soil & Terr Environm Phys, Inst Biogeochem & Pollutant Dynam, Zurich, Switzerland |
推荐引用方式 GB/T 7714 | Or, D.,Lehmann, P.. Surface Evaporative Capacitance: How Soil Type and Rainfall Characteristics Affect Global-Scale Surface Evaporation[J]. WATER RESOURCES RESEARCH,2019,55(1):519-539. |
APA | Or, D.,&Lehmann, P..(2019).Surface Evaporative Capacitance: How Soil Type and Rainfall Characteristics Affect Global-Scale Surface Evaporation.WATER RESOURCES RESEARCH,55(1),519-539. |
MLA | Or, D.,et al."Surface Evaporative Capacitance: How Soil Type and Rainfall Characteristics Affect Global-Scale Surface Evaporation".WATER RESOURCES RESEARCH 55.1(2019):519-539. |
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