Estimation of evapotranspiration over the terrestrial ecosystems in China
文献类型：EI期刊论文
| 作者 | Yu Guirui
|
| 发表日期 | 2014 |
| 关键词 | Ecosystems Advanced very high resolution radiometers (AVHRR) Data processing Evapotranspiration Meteorology Remote sensing |
| 英文摘要 | Quantifying regional evapotranspiration (ET) and environmental constraints are particularly important for understanding water and carbon cycles of terrestrial ecosystems. However, a large uncertainty in the regional estimation of ET still remains for the terrestrial ecosystems in China. This study used ET measurements of 34 eddy covariance sites within China and adjacent regions to examine the performance of the revised Remote Sensing-Penman Monteith (RS-PM) model over various ecosystem types including forests, grasslands, wetlands and croplands. No significant systematic error was found in the revised RS-PM model predictions, which explained 61% of the ET variations at all of the validation sites. Regional patterns of ET at a spatial resolution of 1010km were quantified using a meteorology dataset from 753 meteorological stations, Modern Era Retrospective-analysis for Research and Applications (MERRA) reanalysis products and satellite data such as the Advanced Very High Resolution Radiometer (AVHRR) leaf area index. ET decreased from the southeast of China toward the northwest. Relatively high ET values were found in the southern China such as Yunnan, Hainan, Fujian and Guangdong Provinces, whereas low ET values occurred in northwestern China such as in the Xinjiang autonomous region. On average, the annual ET presented an increasing trend during the 1982-2009, with relatively low ET in 1985, 1993, 1997, 2000 and 2009. We found that the mean annual ET was higher than world average, ranging spatially between 484 and 521mmyr-1, with a mean value of 500mmyr-1, which accounted for approximately 56-83% of the world's total land-surface ET. 2012 John Wiley Sons, Ltd. |
| 出处 | Ecohydrology
 |
| 卷 | 7期:1页:139-149 |
| 收录类别 | EI |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/31168]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 地理科学与资源研究所_生态系统研究网络观测与模拟重点实验室_CERN水分分中心 |
| 推荐引用方式 GB/T 7714 | Yu Guirui. Estimation of evapotranspiration over the terrestrial ecosystems in China. 2014. |
入库方式： OAI收割
来源：地理科学与资源研究所
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