Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL074041 |
Constrained variability of modeled T:ET ratio across biomes | |
Fatichi, Simone1; Pappas, Christoforos2,3 | |
2017-07-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:13 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; Canada |
英文摘要 | A large variability (35-90%) in the ratio of transpiration to total evapotranspiration (referred here as T: ET) across biomes or even at the global scale has been documented by a number of studies carried out with different methodologies. Previous empirical results also suggest that T: ET does not covary with mean precipitation and has a positive dependence on leaf area index (LAI). Here we use a mechanistic ecohydrological model, with a refined process-based description of evaporation from the soil surface, to investigate the variability of T: ET across biomes. Numerical results reveal a more constrained range and higher mean of T: ET (70 +/- 9%, mean +/- standard deviation) when compared to observation-based estimates. T: ET is confirmed to be independent from mean precipitation, while it is found to be correlated with LAI seasonally but uncorrelated across multiple sites. Larger LAI increases evaporation from interception but diminishes ground evaporation with the two effects largely compensating each other. These results offer mechanistic model-based evidence to the ongoing research about the patterns of T: ET and the factors influencing its magnitude across biomes. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406257400039 |
WOS关键词 | TERRESTRIAL WATER FLUXES ; LAND-SURFACE ; POTENTIAL EVAPOTRANSPIRATION ; HYDRAULIC CONDUCTIVITY ; RAINFALL INTERCEPTION ; SOIL EVAPORATION ; ENERGY-BALANCE ; USE EFFICIENCY ; GLOBAL-SCALE ; ELEVATED CO2 |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/27010 |
专题 | 气候变化 |
作者单位 | 1.ETH, Inst Environm Engn, Zurich, Switzerland; 2.Univ Montreal, Dept Geog, Montreal, PQ, Canada; 3.Univ Montreal, Ctr Etud Nord, Montreal, PQ, Canada |
推荐引用方式 GB/T 7714 | Fatichi, Simone,Pappas, Christoforos. Constrained variability of modeled T:ET ratio across biomes[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(13). |
APA | Fatichi, Simone,&Pappas, Christoforos.(2017).Constrained variability of modeled T:ET ratio across biomes.GEOPHYSICAL RESEARCH LETTERS,44(13). |
MLA | Fatichi, Simone,et al."Constrained variability of modeled T:ET ratio across biomes".GEOPHYSICAL RESEARCH LETTERS 44.13(2017). |
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