| Decreasing Reference Evapotranspiration in a Warming Climate—A Case of Changjiang (Yangtze) River Catchment During 1970–2000 |
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| 引用本文： | 许崇育,龚乐冰,姜彤,陈德亮.Decreasing Reference Evapotranspiration in a Warming Climate—A Case of Changjiang (Yangtze) River Catchment During 1970–2000[J].大气科学进展,2006,23(4):513-520. |
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| 作者姓名： | 许崇育 龚乐冰 姜彤 陈德亮 |
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| 作者单位： | [1]Department of Geosciences, University of Oslo, P. O Box 1047 Blindern, NO-0316 Oslo, Norway [2]Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008 [3]Department of Earth Sciences, Uppsala University, Villavagen 16, S-75236 Uppsala, Sweden [4]Department of Earth Sciences, Gothenburg University, Sweden [5]Laboratory for Climate Studies/National Climate Center, China Meteorological Administration, Beijing 100081 |
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| 基金项目： | 中国科学院基金，教育部长江学者奖励计划 |
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| 摘 要： | This study deals with temporal trends in the Penman-Monteith reference evapotranspiration estimated from standard meteorological observations, observed pan evaporation, and four related meteorological variables during 1970–2000 in the Yangtze River catchment. Relative contributions of the four meteorological variables to changes in the reference evapotranspiration are quantified. The results show that both the reference evapotranspiration and the pan evaporation have significant decreasing trends in the upper, the middle as well as in the whole Changjiang (Yangtze) River catchment at the 5% significance level, while the air temperature shows a significant increasing trend. The decreasing trend detected in the reference evapotranspiration can be attributed to the significant decreasing trends in the net radiation and the wind speed.
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| 关 键 词： | 温室效应 长江 蒸散作用 灌溉系统 水平衡 |
| 收稿时间： | 2005-10-02 |
| 修稿时间： | 2006-01-14 |
Decreasing reference evapotranspiration in a warming climate—A case of Changjiang (Yangtze) River catchment during 1970–2000 |
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| Chong-yu Xu,Lebing Gong,Tong Jiang,Deliang Chen.Decreasing reference evapotranspiration in a warming climate—A case of Changjiang (Yangtze) River catchment during 1970–2000[J].Advances in Atmospheric Sciences,2006,23(4):513-520. |
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| Authors: | Chong-yu Xu Lebing Gong Tong Jiang Deliang Chen |
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| Institution: | Department of Geosciences, University of Oslo, P. O Box 1047 Blindern, NO-0316 Oslo, Norway, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008,Department of Earth Sciences, Uppsala University, Villavagen 16, S-75236 Uppsala, Sweden, Department of Earth Sciences, Gothenburg University, Sweden,Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008,Department of Earth Sciences, Gothenburg University, Sweden, Laboratory for Climate Studies/National Climate Center, China Meteorological Administration, Beijing 100081 |
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| Abstract: | This study deals with temporal trends in the Penman-Monteith reference evapotranspiration estimated from standard meteorological observations, observed pan evaporation, and four related meteorological variables during 1970-2000 in the Yangtze River catchment. Relative contributions of the four meteorological variables to changes in the reference evapotranspiration are quantified. The results show that both the reference evapotranspiration and the pan evaporation have significant decreasing trends in the upper, the middle as well as in the whole Changjiang (Yangtze) River catchment at the 5% significance level, while the air temperature shows a significant increasing trend. The decreasing trend detected in the reference evapotranspiration can be attributed to the significant decreasing trends in the net radiation and the wind speed. |
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| Keywords: | reference evapotranspiration Penman-Monteith method temporal trend Changjiang (Yangtze) River catchment China |
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