干旱区生态环境知识资源中心(Arid): 塔克拉玛干沙漠周边地区潜在蒸散时空演变特征及其主要影响因素

Arid

	塔克拉玛干沙漠周边地区潜在蒸散时空演变特征及其主要影响因素
其他题名	Spatio-temporal Variations of Potential Evapotranspiration around Taklimakan Desert and the Main Influencing Factors
	段春锋; 缪启龙; 曹雯
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2012
卷号	32 期号:6 页码:1723-1730
中文摘要	潜在蒸散是区域干湿状况评价、作物需水量估算和水资源合理规划的关键因子。基于FAO推荐的Pen-man-Monteith公式和16个台站19612009年逐日气象观测资料,估算塔克拉玛干沙漠周边地区的潜在蒸散量ET_0,在对ET_0的时空演变特征进行分析的基础上,探讨了影响该地区ET_0变化的主要因素。结果表明,塔克拉玛干沙漠周边地区独特的自然地理条件导致多年平均潜在蒸散的分布和变化具有明显的空间差异。49a来塔克拉玛干沙漠周边地区年和四季ET_0变化整体上均为下降趋势,时间演变过程中在20世纪90年代初期均由下降趋势转为缓慢上升趋势。空间上,ET_0变化在北部地区多为显著下降趋势,而南部地区多不显著;春、夏、秋3季ET_0变化趋势的空间分布与年情况比较一致,但冬季ET_0呈上升趋势的站点明显增多。影响塔克拉玛干沙漠周边地区多数站点ET_0变化的主导因子是风速;第二影响因子春季和夏季主要是日照时数,而影响秋季和冬季ET_0变化的主要是平均气温。
英文摘要	Potential evapotranspiration(ET_0) is a key factor for analyzing regional moisture condition,estimating crop water requirement and managing water resources.In the study,based on the daily meteorological data during 1961-2009 from 16 meteorological stations around the Taklimakan Desert,we computed ET_0 with the Penman-Monteith equation recommended by FAO and analyzed its spatio-temporal variations and the influencing factors through the partial correlation analysis.Results showed that there are obviously regional differences in the average yearly ET_0 variation and the main determining factor was the diverse topography and climate around the Taklimakan Desert.The annual and seasonal ET_0 variations showed a general declining trend in 1961-2009,appearing a secondary increasing trend from the lowest value point since 1990s.In spatial pattern,ET_0 decreased more significantly in the north part than in the south part around the Taklimakan Desert;the spatial distributions of seasonal ET_0 in spring,summer and autumn had roughly similar pattern compared with that of annual ET_0,while the spatial distribution in winter showed more increasing trends at these stations.The absolute values of partial correlation coefficients between ET_0 and the climate variables indicated that wind speed played the most important role in the change of ET_0 around the Taklimakan Desert;the secondly significant factor was sunshine duration in spring and summer,and it was air temperature in autumn and winter.
中文关键词	潜在蒸散 ; 变化趋势 ; 偏相关系数 ; 塔克拉玛干沙漠周边地区
英文关键词	potential evapotranspiration change trend partial correlation coefficient Taklimakan Desert periphery
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:4671521
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229081
作者单位	南京信息工程大学应用气象学院, 江苏省农业气象重点实验室, 南京, 江苏 210044, 中国
推荐引用方式 GB/T 7714	段春锋,缪启龙,曹雯. 塔克拉玛干沙漠周边地区潜在蒸散时空演变特征及其主要影响因素[J],2012,32(6):1723-1730.
APA	段春锋,缪启龙,&曹雯.(2012).塔克拉玛干沙漠周边地区潜在蒸散时空演变特征及其主要影响因素.中国沙漠,32(6),1723-1730.
MLA	段春锋,et al."塔克拉玛干沙漠周边地区潜在蒸散时空演变特征及其主要影响因素".中国沙漠 32.6(2012):1723-1730.