干旱区生态环境知识资源中心(Arid): 不同时间尺度下华北平原干湿气候时空变化及成因分析

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	不同时间尺度下华北平原干湿气候时空变化及成因分析
其他题名	Spatiotemporal Variation and Causes Analysis of Dry-wet Climate at Different Time Scales in North China Plain
	胡琦 1; 董蓓 1; 潘学标 1; 王潇潇 1; 魏培 1; 赵海涵 1; 张煦庭 2
来源期刊	中国农业气象
ISSN	1000-6362
出版年	2017
卷号	38 期号:5 页码:267-277
中文摘要	利用华北平原62个气象站点1961-2014年逐日地面观测资料以及同期降水量资料,基于Penman-Monteith方法计算的参考作物蒸散量(ET_0)研究近54a研究区干湿气候时空变化特征,并利用敏感性和贡献率法分析气候变化背景下主要气象因子对ET_0的影响,对干湿气候变化的成因进行探讨。结果表明:华北平原在3个时间段(时段1:1961-1980;时段2:1981-2000;时段3:2001-2014)半干旱区和半湿润区的分界线呈东扩和南移,半干旱区面积不断扩大,湿润区面积变化不明显;研究区1961-2014年ET_0呈显著下降趋势,空间差异大,河南和山东部分地区由于ET_0下降趋势大于降水量减少趋势,气候变湿润;鲁东、天津、河北东部地区降水量减少且ET_0增加,干旱化趋势明显。就月尺度而言,降水量在7月和8月减少幅度最大,夏季ET_0减少幅度较大,5月和6月气候呈变湿趋势。ET_0对相对湿度的变化最敏感,各月导致ET_0变化的主要贡献因子不一,11月-翌年1月风速起主导作用,2月温度为主导因子,6-9月日照时数为主导因子,其它月份为相对湿度、风速等综合作用的结果。
英文摘要	Global warming has caused non-uniform changes in precipitation intensity and distribution, which will inevitable impact on the wet and dry climate. In order to make clear the distribution of dry-wet climate zone and changes have occurred in recent 54 years, authors analyzed the temporal and spatial variation characteristics of dry and wet climate in North China Plain over the period 1961 to 2014 in this paper. The influence of main meteorological factors on ET_0 was also been studied by using the sensitivity and contribution rate method, as well as the causes for dry-wet climate variation. In this study, 62 meteorological stations each with 54-year data record (from 1961 to 2012) were selected in China (including Beijing, Tianjin, Shandong, Henan and Hebei), ET_0 was then calculated by using Penman-Monteith method. The results showed that the area of semi-arid area was expanding continuously since the dividing line for semi-arid area and semi-humid area extended eastward and southward in three periods (period 1:1961-1980; period 2:1981-2000; period 3:2001-2014). However, the humid area did not show significant changing trend. Precipitation showed non-significant trend over the period 1961 to 2014, while ET_0 showed a significant decreasing trend with large spatial differences. In most parts of Henan and Shandong, the climate became wet because that the negative trend for ET_0 is larger than the decreasing trend for precipitation. On the contrast, most of Tianjin and Hebei regions showed significant dry trend rates with the decreasing precipitation and increasing ET_0. As for the main contribution factor to ET_0 changes in each month, wind speed was the dominant factor in November to the following January, temperature in February, and sunshine hours in June to September. The main contribution factors to ET_0 in other months were result from the combined effects of relative humidity and wind speed.
中文关键词	华北平原 ; 参考作物蒸散量 ; 降水量 ; 敏感性 ; 贡献率
英文关键词	North China Plain Reference crop evapotranspiration Precipitation Sensitive coefficient Contribution rate
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:5989626
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237053
作者单位	1.中国农业大学资源与环境学院, 农业部武川农业环境科学观测实验站, 北京 100193, 中国; 2.中国农业大学资源与环境学院, 北京 100193, 中国
推荐引用方式 GB/T 7714	胡琦,董蓓,潘学标,等. 不同时间尺度下华北平原干湿气候时空变化及成因分析[J]. 中国农业大学,2017,38(5):267-277.
APA	胡琦.,董蓓.,潘学标.,王潇潇.,魏培.,...&张煦庭.(2017).不同时间尺度下华北平原干湿气候时空变化及成因分析.中国农业气象,38(5),267-277.
MLA	胡琦,et al."不同时间尺度下华北平原干湿气候时空变化及成因分析".中国农业气象 38.5(2017):267-277.