| Effects of Climatic Change on Evapotranspiration in Zhalong Wetland, Northeast China |
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| 作者姓名： | WANG Hao XU Shiguo SUN Leshi |
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| 作者单位： | 1. Institute of Water and Environmental Research，Department of Civil Engineering，Dalian University of Technology，Dalian 116023，China; 2. Meteorological Bureau of Qiqihar，Qiqihar 161000，China |
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| 基金项目： | Under the auspices of the National Natural Science Foundation of China (No. 50139020) |
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| 摘 要： | 1 Introduction As a result of persistent increase in carbon dioxide in the atmosphere since the 1950s, global and regional climate features, such as temperature and precipitation, have ob- viously changed (Yu et al., 2002). The General Circulation Models (GCMs) provide potential climate scenarios by studying the effects of carbon dioxide on the temperature. Tickell (1993) predicted that the mean temperature will increase by 1℃ till the year 2050 and by 3℃ at the end of the 22th century. S…
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| 关 键 词： | 气候变化 蒸散作用 循环模型 扎龙湿地 |
| 收稿时间： | 2006-02-30 |
| 修稿时间： | 2006-07-18 |
Effects of climatic change on evapotranspiration in Zhalong Wetland, Northeast China |
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| WANG Hao XU Shiguo SUN Leshi.Effects of Climatic Change on Evapotranspiration in Zhalong Wetland, Northeast China[J].Chinese Geographical Science,2006,16(3):265-269. |
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| Authors: | Hao Wang Shiguo Xu Leshi Sun |
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| Institution: | (1) Institute of Water and Environmental Research, Department of Civil Engineering, Dalian University of Technology, Dalian, 116023, China;(2) Meteorological Bureau of Qiqihar, Qiqihar, 161000, China |
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| Abstract: | Evapotranspiration (ET) process of plants is controlled by several factors. Besides the physiological factors of plants, height, density, LAI (leaf
area index), etc., the change of meteorological factors, such as radiation, temperature, wind and precipitation, can influence
ET process evidently, thus remodeling the spatial and temporal distribution of ET. In order to illuminate the effects of meteorological
factors on wetland ET, the ET of Zhalong Wetland was calculated from 1961 to 2000, the statistical relationships (models) between ET and maximum temperature (T
max), minimum temperature (T
min), precipitation (P) and wind speed at 2m height (U
2) were established, and the sensitivity analysis of the variables in the model was performed. The results show that T
max and T
min are two dominating factors that influence ET markedly, and the difference of rising rate between T
max and T
min determines the change trend of ET. With the climatic scenarios of four General Circulation Models (GCMs), the ET from 2001 to 2060 was predicted by the statistical
model. Compared to the period of 1961–2000, the water consumption by ET will increase greatly in the future. According to
the scenarios, the rise of T
max (about 1.5°C to 3.3°C) and T
min (about 1.7°C to 3.5°C) will cause an additional water consumption of 14.0%–17.8% for reed swamp. The ecological water demand
in Zhalong Wetland will become more severe.
Foundation item: Under the auspices of the National Natural Science Foundation of China (No. 50139020)
Biography: WANG Hao (1976–), male, a native of Liaoyang of Liaoning Province, Ph.D. candidate, specialized in water resources
and water environment. |
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| Keywords: | climate change evapotranspiration General Circulation Model Zhalong Wetland |
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