干旱区生态环境知识资源中心(Arid): 东北地区湿润指数及其干湿界线的变化特征

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	东北地区湿润指数及其干湿界线的变化特征
其他题名	Change characteristics of humid index and dry/wet climate boundary in Northeast China
	张淑杰 1; 张玉书 1; 陈鹏狮 2; 蔡福 1; 武晋雯 1; 纪瑞鹏 1
来源期刊	干旱地区农业研究
ISSN	1000-7601
出版年	2011
卷号	29 期号:3 页码:226-232
中文摘要	利用1961～2007年东北地区124个气象站的温度、降水、风、水汽压、日照等气候资料，采用Penman-Monteitht模型计算参考蒸散量，进一步计算了湿润指数，分析了参考蒸散量和湿润指数的变化趋势及干湿界线的变化情况。结．果表明：湿润指数总体呈下降的趋势，变干趋势发生在半干旱半湿润气候区及湿润气候区的大部分地区，湿润指数倾向率负变化幅度大于正变化幅度。湿润指数>1．0的湿润气候区和降水量大于700 mm的区域分布基本一致，湿润指数小于0．5的区域大于降水量小于400 mm的区域，湿润指数在半干旱气候区变异系数较大，为 25％～36％，半湿润和湿润气候区的变异系数较小；标准差的分布与变异系数有相反的趋势。半干旱一半湿润和湿润-半湿润分界线倾向于东北西南走向，但各年代界线摆动幅度较大，出现整体移动趋势。以1960年代界线为变化基准线，1980年代向西移，2001～2007年代的变化幅度最大，向东南移动明显，半干旱区扩大，湿润区缩小，东北地区有逐渐变干的趋势，进一步说明气候变干的进程加快，干旱范围扩大，程度加强。
英文摘要	Using basic daily data of 124 weather stations from 1961-2007,based on Penman-Monteith method,reference evapotranspiration (RE)and HI are calculated as well as theirs trends and changes of borderline in the wet and dry climate zone are studied.The results show that RE ranges from 500-1 000 mm and is distributed with large value in the southwestern part and small value in the northeastern part of Northeast China.Annual RE which is decreasing especially from 1960s ~ 1990s and increasing significantly after 2000,demonstrates uptrend in 1/3 zone and downtrend in 2/3 zone in terms of spatial distribution.Humid climatic region where HI is larger than 1.0 is basically consistent with where precipitation is greater than 700 mm.The area of region where HI is smaller than 0.5 is larger than where precipitation is less than 400 mm.The coefficient of variation of HI with range from 25 %-36% is larger in semi-arid climatic region and is smaller in semi-humid and humid climatic region.With decreasing in the mass HI,semi-arid,semi-humid and the great mass humid climatic regions where positive amplitude of variation of climate tendency of HI is larger than the negative are running dry.The boundary between semi-arid/semi-humid and humid/semi-humid runns from northeast to southwest swings wildly and shows a trend of monolithic translation.At the basic line of 1960s’ boundary,the 1980s boundary move westward and the boundary after 2000 move evidently southeastward,which leads to semi-arid region expanding and humid region contracting,in turn,Northeast China is drying gradually and drying areas are enlarging.
中文关键词	湿润指数 ; 干湿界线 ; 变化特征 ; 东北地区
英文关键词	humid index wet/dry boundary change characteristic Northeast China
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4206559
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226422
作者单位	1.中国气象局沈阳大气环境研究所, 沈阳, 辽宁 110016, 中国; 2.辽宁省气象局, 沈阳, 辽宁 110001, 中国
推荐引用方式 GB/T 7714	张淑杰,张玉书,陈鹏狮,等. 东北地区湿润指数及其干湿界线的变化特征[J],2011,29(3):226-232.
APA	张淑杰,张玉书,陈鹏狮,蔡福,武晋雯,&纪瑞鹏.(2011).东北地区湿润指数及其干湿界线的变化特征.干旱地区农业研究,29(3),226-232.
MLA	张淑杰,et al."东北地区湿润指数及其干湿界线的变化特征".干旱地区农业研究 29.3(2011):226-232.