Spatiotemporal Changes of Reference Evapotranspiration in Mongolia during 1980–2006
Reference evapotranspiration (RET) plays an important role in the terrestrial hydrological cycle. Applying the Penman-Monteith method, the RET over Mongolia was estimated from 1980 to 2006. The changing trends and magnitude of RET were detected by the Mann-Kendall test and Theil-Sen’s slope methods....
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2016/9586896 |
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| author | Wenjun Yu Tonghua Wu Weizhen Wang Ren Li Tianye Wang Yanhui Qin Weihua Wang Xiaofan Zhu |
| author_facet | Wenjun Yu Tonghua Wu Weizhen Wang Ren Li Tianye Wang Yanhui Qin Weihua Wang Xiaofan Zhu |
| author_sort | Wenjun Yu |
| collection | DOAJ |
| description | Reference evapotranspiration (RET) plays an important role in the terrestrial hydrological cycle. Applying the Penman-Monteith method, the RET over Mongolia was estimated from 1980 to 2006. The changing trends and magnitude of RET were detected by the Mann-Kendall test and Theil-Sen’s slope methods. Meanwhile, aridity indices were estimated using two different indices. The impacts of meteorological variables on RET were assessed through sensitive analysis by comparing the resulting RETs from artificially disturbed meteorological variables. The results indicated that the RET for 16 stations in Mongolia showed an increasing trend, particularly in the center and south. The calculated RET was higher than precipitation, which means severe droughts in Mongolia. The spatial patterns of RET are significantly influenced by climatic conditions as well as characteristics of the underlying surface (e.g., elevation and vegetation). The mean annual RET decreased from the south to the north, owing to sparse vegetation in the south of Mongolia. The sensitivity analysis revealed that the changes of RET were strongly affected by air temperature and relative humidity. |
| format | Article |
| id | doaj-art-9394908768da48a892d3c415d934a8b1 |
| institution | OA Journals |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-9394908768da48a892d3c415d934a8b12025-08-20T02:10:12ZengWileyAdvances in Meteorology1687-93091687-93172016-01-01201610.1155/2016/95868969586896Spatiotemporal Changes of Reference Evapotranspiration in Mongolia during 1980–2006Wenjun Yu0Tonghua Wu1Weizhen Wang2Ren Li3Tianye Wang4Yanhui Qin5Weihua Wang6Xiaofan Zhu7Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, ChinaNorthwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, ChinaNorthwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, ChinaNorthwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, ChinaNorthwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, ChinaNorthwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, ChinaNorthwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, ChinaNorthwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, ChinaReference evapotranspiration (RET) plays an important role in the terrestrial hydrological cycle. Applying the Penman-Monteith method, the RET over Mongolia was estimated from 1980 to 2006. The changing trends and magnitude of RET were detected by the Mann-Kendall test and Theil-Sen’s slope methods. Meanwhile, aridity indices were estimated using two different indices. The impacts of meteorological variables on RET were assessed through sensitive analysis by comparing the resulting RETs from artificially disturbed meteorological variables. The results indicated that the RET for 16 stations in Mongolia showed an increasing trend, particularly in the center and south. The calculated RET was higher than precipitation, which means severe droughts in Mongolia. The spatial patterns of RET are significantly influenced by climatic conditions as well as characteristics of the underlying surface (e.g., elevation and vegetation). The mean annual RET decreased from the south to the north, owing to sparse vegetation in the south of Mongolia. The sensitivity analysis revealed that the changes of RET were strongly affected by air temperature and relative humidity.http://dx.doi.org/10.1155/2016/9586896 |
| spellingShingle | Wenjun Yu Tonghua Wu Weizhen Wang Ren Li Tianye Wang Yanhui Qin Weihua Wang Xiaofan Zhu Spatiotemporal Changes of Reference Evapotranspiration in Mongolia during 1980–2006 Advances in Meteorology |
| title | Spatiotemporal Changes of Reference Evapotranspiration in Mongolia during 1980–2006 |
| title_full | Spatiotemporal Changes of Reference Evapotranspiration in Mongolia during 1980–2006 |
| title_fullStr | Spatiotemporal Changes of Reference Evapotranspiration in Mongolia during 1980–2006 |
| title_full_unstemmed | Spatiotemporal Changes of Reference Evapotranspiration in Mongolia during 1980–2006 |
| title_short | Spatiotemporal Changes of Reference Evapotranspiration in Mongolia during 1980–2006 |
| title_sort | spatiotemporal changes of reference evapotranspiration in mongolia during 1980 2006 |
| url | http://dx.doi.org/10.1155/2016/9586896 |
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