Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14577 |
Determinants of the ratio of actual to potential evapotranspiration | |
Peng, Liqing1; Zeng, Zhenzhong1; Wei, Zhongwang2; Chen, Anping3; Wood, Eric F.1; Sheffield, Justin4 | |
2019-04-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
![]() |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:4页码:1326-1343 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Japan; England |
英文摘要 | A widely used approach for estimating actual evapotranspiration (AET) in hydrological and earth system models is to constrain potential evapotranspiration (PET) with a single empirical stress factor (omega = AET/PET). omega represents the water availability and is fundamentally linked to canopy-atmosphere coupling. However, the mean and seasonal variability of omega in the models have rarely been evaluated against observations, and the model performances for different climates and biomes remain unclear. In this study, we first derived the observed omega from 28 FLUXNET sites over North America during 2000-2007, which was then used to evaluate omega in six large-scale model-based datasets. Our results confirm the importance of incorporating canopy height in the formulation of aerodynamic conductance in the case of forests. Furthermore, leaf area index (LAI) is central to the prediction of omega and can be quantitatively linked to the partitioning between transpiration and soil evaporation (R-2 = 0.43). The substantial differences between observed and model-based omega in forests (range: 0.2 similar to 0.9) are highly related to the way these models estimated PET and the way they represented the responses of omega to the environmental drivers, especially wind speed and LAI. This is the first assessment of omega in models based on in situ observations. Our findings demonstrate that the observed omega is useful for evaluating, validating, and optimizing the modeling of AET and thus of water and energy balances. |
英文关键词 | aerodynamic conductance canopy height decoupling evapotranspiration leaf area index potential evapotranspiration surface conductance |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000461817500011 |
WOS关键词 | LAND-SURFACE EVAPORATION ; STOMATAL RESPONSES ; WATER-BALANCE ; TERRESTRIAL EVAPOTRANSPIRATION ; CARBON-DIOXIDE ; WIND VELOCITY ; TRANSPIRATION ; MODEL ; SCALE ; LEAF |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
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/16820 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Princeton Univ, Dept Civil & Environm Engn, Princeton, NJ 08544 USA; 2.Univ Tokyo, Dept Civil Engn, River & Environm Engn Lab, Tokyo, Japan; 3.Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA; 4.Univ Southampton, Sch Geog & Environm Sci, Southampton, Hants, England |
推荐引用方式 GB/T 7714 | Peng, Liqing,Zeng, Zhenzhong,Wei, Zhongwang,et al. Determinants of the ratio of actual to potential evapotranspiration[J]. GLOBAL CHANGE BIOLOGY,2019,25(4):1326-1343. |
APA | Peng, Liqing,Zeng, Zhenzhong,Wei, Zhongwang,Chen, Anping,Wood, Eric F.,&Sheffield, Justin.(2019).Determinants of the ratio of actual to potential evapotranspiration.GLOBAL CHANGE BIOLOGY,25(4),1326-1343. |
MLA | Peng, Liqing,et al."Determinants of the ratio of actual to potential evapotranspiration".GLOBAL CHANGE BIOLOGY 25.4(2019):1326-1343. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论