Sensitivity of potential evapotranspiration to meteorological factors and their elevational gradients in the Qilian Mountains, northwestern China
文献类型：期刊论文
| 作者 | Yang, Yong; Chen, Rensheng; Song, Yaoxuan; Han, Chuntan; Liu, Junfeng; Liu, Zhangwen |
| 刊名 | JOURNAL OF HYDROLOGY
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| 出版日期 | 2019 |
| 卷号 | 568页码:147-159 |
| ISSN号 | 0022-1694 |
| 关键词 | Potential evapotranspiration Penman method Sensitivity analysis High elevation Mountainous regions |
| DOI | 10.1016/j.jhydrol.2018.10.069 |
| 通讯作者 | Yang, Yong(yy177@lzb.ac.cn) ; Chen, Rensheng(crs2008@lzb.ac.cn) |
| 英文摘要 | Mountainous regions are important sources of freshwater. Measurement of actual evapotranspiration (ET) is difficult to obtain in high mountain regions because of the harsh natural environment, and potential ET (PET) is therefore a suitable term to describe the atmospheric water demand of land surfaces under given meteorological conditions in those high elevation areas. In situ measured meteorological data were collected in 2015 and 2016 from five meteorological stations at various elevations from 2980 m to 4484 m in the Qilian Mountains, northwestern China, and the meteorological factors changed markedly with elevation. PET calculated with the Penman method showed a significant elevational gradient, and decreased as the elevation increased. The sensitivity analysis indicated that over the whole period, PET in the research region was most sensitive to net radiation (RN), followed by relative humidity (RH), air temperature (T), wind speed (WS) and soil heat flux (G). When RN was positive, the sensitivity of PET to RN decreased as the elevation increased, and when RN was negative, the sensitivity increased as the elevation increased. When T was above 0 degrees C, the sensitivity of PET to T decreased as the elevation increased, and when T was below 0 degrees C, the sensitivity increased as the elevation increased. The higher the elevation, the greater the sensitivity of PET to both RH and WS. The topographic shading in mountainous regions affected meteorological factors, PET and its sensitivity to meteorological factors in those high elevation areas. The RN was relatively small at the sites with topographic shading because of the reduction in solar radiation, and resulted in less sensitivity of PET to RN and greater sensitivity of PET to other meteorological factors. This study can help us to understand PET in the Qilian mountains and in other mountain regions from which meteorological data are difficult to obtain and very sensitive to climate change. |
| 收录类别 | SCI |
| WOS关键词 | CLIMATE-CHANGE IMPACTS ; LONGWAVE RADIATION ; EVAPORATIVE DEMAND ; WATER-RESOURCES ; LOESS PLATEAU ; HEXI CORRIDOR ; TRENDS ; TEMPERATURE ; MODELS ; RESOLUTION |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| WOS类目 | Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000455694400012 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558199 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Yang, Yong; Chen, Rensheng |
| 作者单位 | Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Qilian Alpine Ecol & Hydrol Res Stn, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Yong,Chen, Rensheng,Song, Yaoxuan,et al. Sensitivity of potential evapotranspiration to meteorological factors and their elevational gradients in the Qilian Mountains, northwestern China[J]. JOURNAL OF HYDROLOGY,2019,568:147-159. |
| APA | Yang, Yong,Chen, Rensheng,Song, Yaoxuan,Han, Chuntan,Liu, Junfeng,&Liu, Zhangwen.(2019).Sensitivity of potential evapotranspiration to meteorological factors and their elevational gradients in the Qilian Mountains, northwestern China.JOURNAL OF HYDROLOGY,568,147-159. |
| MLA | Yang, Yong,et al."Sensitivity of potential evapotranspiration to meteorological factors and their elevational gradients in the Qilian Mountains, northwestern China".JOURNAL OF HYDROLOGY 568(2019):147-159. |
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来源：寒区旱区环境与工程研究所
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