三峡下垫面变化对区域气候效应的影响研究*

南京大学学报(自然科学版) ›› 2011, Vol. 47 ›› Issue (3): 330–338.

三峡下垫面变化对区域气候效应的影响研究*

李艳 1,2 ** , 高阳华 1 , 陈鲜艳 3 , 杜钦 1

出版日期:2015-04-10 发布日期:2015-04-10
作者简介: ( 1. 重庆市气象科学研究所, 重庆, 401147; 2. 南京信息工程大学气象灾害省部共建教育部
重点实验室, 南京, 210044; 3. 国家气候中心, 北京, 100081)
基金资助:
国家自然科学基金( 40805039) , 中国博士后科学基金( 20090451233) , 江苏省博士后科学基金( 0901049C) , 重庆
市气象局开放式研究基金, 国际科技合作计划项目( 2010DFA21340)

The impact of the land use change associated with the Three Gorges Dam on regional climate change

Li Yan 1, 2 , Gao Yang H ua 1 , Chen Xian Yan 3 , Du Qin 1

Online:2015-04-10 Published:2015-04-10
About author: ( 1. Chongqing Institute of Meteorological Scienses, Chongqing, 401147, China;
2. Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of
Information Science and T echnology, Nanjing, 210044, China;
3. National Climate Center, Beijing, 100081, China)

摘要/Abstract

摘要： 利用中尺度数值天气预报模式( WRF), 通过控制试验与改变三峡库区水体结构的理想试验, 分析了三峡库区蓄水后可能引起的区域气候效应. 研究结果标明: 针对三峡库区气候特征的再现能力分
析发现逐月模拟实验优于逐日模拟实验; 三峡大坝的水体扩展引起了库区区域气候的较弱变化, 平均气温与平均风速的变化较小, 仅在狭窄的三峡水道上出现了弱的气温升高与风速增大的现象, 变化幅度分
别为 0 ºC5 ~ 1.5 º C 、 0 1~ 1 m/s; 三峡库区水体面积扩大后引起了库区北部部分地区的降水增加, 这主要是由于下垫面的变化与局地特殊地形相耦引起了水汽与风场的变化, 从而影响了降水量的变化. 三峡
工程引起的气候变化主要表现在近地层, 越往高层影响越小, 对 850 hPa 及以上高度层几乎没有影响.

Abstract: The impact of the Three Gorges Dam ( TGD) on regional climate change is examined trough comparison between the two simulations of control and land use change, using the Weather Research and Forcast ( WRF)
model. According to the ability of reappearing the cliamte change on the Three Gorges resevoir area, the results show that the simulation with monthly continuous integration is superior to that with dayly continuous integration.
The analysis indicates the climatic effect of the land use change associated with the TGD construction is weak on the regional scale. The surface temperature of the T GD region is increased, which range is 0 ºC 5 to 1.5ºC , and there
is almost no change on any other areas. Similar to the temperature, the wind speed of near surface is only changed on the area of TGD, which increased from 0 1 to 1 m/ s. The precipitation in the north of the TGD is increased,
which may be owing to the interaction between the land use change and the complex topography, these efforts mighthange in the vapour and wind patterns, which can have major effects on precipitation. T he results also indicate the
climatic effect of the TGD is mainly refelect on the near surface level, and away from the ground, the effect decreases quickly with height. There is almost no effect exceeding the 850 hPa pressure level above the land.

李艳 1,2 ** , 高阳华 1 , 陈鲜艳 3 , 杜钦 1 . 三峡下垫面变化对区域气候效应的影响研究*

[J]. 南京大学学报(自然科学版), 2011, 47(3): 330–338.

Li Yan 1, 2 , Gao Yang H ua 1 , Chen Xian Yan 3 , Du Qin 1 . The impact of the land use change associated with the Three Gorges Dam on regional climate change

[J]. Journal of Nanjing University(Natural Sciences), 2011, 47(3): 330–338.

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