干旱区生态环境知识资源中心(Arid): 我国北方地区植被类型变化气候效应的虚拟数值试验

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	我国北方地区植被类型变化气候效应的虚拟数值试验
其他题名	Virtual Numerical Experiments on the Climatic Effects of Vegetation Type Changes over Northern China
	张耀存
来源期刊	南京大学学报. 自然科学版
ISSN	0469-5097
出版年	2004
卷号	40 期号:6 页码:684-691
中文摘要	利用区域气候模式(RegCM2)对东北西部、会北北部和西北东部、华北西部两个生态环境脆弱地区植被类型分别由草地变为农田和森林后对区域气候的影响程度进行虚拟数值试验，结果表明，我国北方地区植被类型由草地变为耕地或森林将使得这些地区夏季降落不减少，温度升高，500hPa位势高度升高，副热带高压控制地区的位势高度降低，从而使副高减弱，不利于我国北方的降水增加，从虚拟数值试验的对比中可发现，华北北部、东北西部地区植被类型改变比西北东部、华北西部地区植被类型发迹所引起的降水减少、温度升高和副高减弱效果显著。此外，对于同一个地区的植被类型改变而言，由草地变为森林比由草地变为耕地所引起的降水减少、温度升高和500hPa位势高度变化效应大。因此，根据数值试验结果可知，退耕还草可能是我国北方干旱半干旱地区改状况环境的有效方式，华北北部和东北西部为开展有序人类活动的最佳地区。
英文摘要	Virtual numerical experiments on the climatic effects of vegetation type changes over Northern China have been conducted by using the second-generation regional climate model (RegCM2), where are regions with vulnerable ecological environment. The results show that vegetation type changes from grassland to cropland or deciduous forest result in precipitation reduction, temperature increase, and geopotential height enhancement at 500 hPa over the region of changed vegetation type in summer. The decrease of geopotential height at 500 hPa over the subtropical-high-controlled region leads to the weakening of subtropical high at 500 hPa, which is unfavorable for the increase of rainfall in the northern part of China. It is also found from the comparison of the numerical experiment results that the impact of vegetation type changes on the precipitation reduction and temperature increase is much more significant in Northern China than that in Western China, and in the same region, the effects of precipitation reduction and temperature increase are more obvious in the experiment of vegetation type changs from grassland to deciduous forest than that from grassland to cropland. Therefore, the best approach to improving the ecological environment in the arid and semiarid regions of Northern China is returning farmland to grassland, and the northern part of Northern China and the western part of Northeast China are the best regions for conducting orderly human activities.
中文关键词	植被类型变化 ; 区域气候 ; 虚拟数值试验
英文关键词	changes of vegetation type regional climate virtual numerical experiment
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:1870122
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205253
作者单位	张耀存, 南京大学大气科学系, 南京, 江苏 210093, 中国.
推荐引用方式 GB/T 7714	张耀存. 我国北方地区植被类型变化气候效应的虚拟数值试验[J],2004,40(6):684-691.
APA	张耀存.(2004).我国北方地区植被类型变化气候效应的虚拟数值试验.南京大学学报. 自然科学版,40(6),684-691.
MLA	张耀存."我国北方地区植被类型变化气候效应的虚拟数值试验".南京大学学报. 自然科学版 40.6(2004):684-691.

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