干旱区生态环境知识资源中心(Arid): 西藏参考作物蒸散量时空变化特征与影响因素

Arid

	西藏参考作物蒸散量时空变化特征与影响因素
其他题名	Spatiotemporal Variation of Evapotranspiration of Referred Crops and the Affecting Factors in Tibet
	张娜 1; 金建新 2; 佟长福 3; 张红玲 4; 屈忠义 1
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2017
卷号	34 期号:5 页码:1027-1034
中文摘要	为深入认识西藏参考作物蒸散量(ET_0)的变化特征,采用联合国粮农组织1998年推荐的Penman-Monteith公式计算西藏37个气象站点32 a(1981-2012年)的逐日ET_0,通过联合国防治荒漠化公约提出的全球干旱指数(UNEP)进行气候评价,利用空间插值及Mann-Kendall趋势检验法对西藏及各气候区ET_0时空变化特征进行分析,并通过偏相关分析法对其主要影响因素进行探讨,结果表明:西藏共分为特干旱、干旱、半干旱、干旱半湿润、湿润半湿润和湿润气候区,主要为半干旱气候区。近32 a参考作物蒸散量整体呈减小趋势,变化趋势为-1.508 mm · a~(-1),可将32 a分为3个时段,19811989年处于高蒸散阶段,1989年后处于低蒸散阶段,2005年起又持续回升。西藏西部到东部,年际ET_0呈减小趋势。各气候区气象因子的影响基本符合平均气温> 日照时数> 平均风速>相对湿度,且平均气温、日照时数及平均风速在干旱区的影响较湿润区更为显著。
英文摘要	In order to have a thorough recognition of the variation patterns of reference evapotranspiration ( ET_0 ) in Tibet, in this study the Penman-Monteith method, recommended by the United Nations Food and Agriculture Organization in 1998,was used to estimate the daily ET_0 at 37 meteorological stations in Tibet during the period from 1981 to 2012. Also,the global aridity index (UNEP) proposed by the United Nations Convention on Combating Desertification was applied for the climatic regionalization in Tibet,accompanied by the application of spatial interpolation method and Mann-Kendall Test to explore the spatiotemporal variation of ET_0 in different climatic zones in Tibet. The factors affecting the ET_0 variation were explored through the partial correlation analysis. Results indicated that Tibet could be divided into the hyper-arid, arid, semiarid, dry sub-humid,moist sub-humid and humid climatic subregions,in which the semiarid subregion was the largest. A general decreasing trend of ET_0 with a rate of 1.508 mm · a~(-1) was detected in whole Tibet in recent 32 years,and this process could be classified into three stages. The evapotranspiration was high during the period from 1981 to 1989,it was low after 1989 ,but it began to increase after 2005. The annual ET_0 was decreased from the west to the east of the study area. The climatic factors contributing to the ET_0 variation in Tibet were generally in an order of mean temperature > sunshine duration > mean wind speed > relative humidity,and the impacts of mean temperature,sunshine duration and mean wind speed in arid region were relatively higher than those in other climatic areas.
中文关键词	参考作物 ; 蒸散量 ; 时空变化 ; 成因分析 ; 偏相关分析 ; 西藏
英文关键词	evapotranspiration spatiotemporal variation formation cause partial correlation analysis Tibet
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6073523
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236010
作者单位	1.内蒙古农业大学水利与土木建筑工程学院, 呼和浩特, 内蒙古 010018, 中国; 2.宁夏农林科学院, 银川, 宁夏 750002, 中国; 3.水利部牧区水利科学研究所, 呼和浩特, 内蒙古 010020, 中国; 4.宁夏回族自治区水利科学研究院, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	张娜,金建新,佟长福,等. 西藏参考作物蒸散量时空变化特征与影响因素[J]. 内蒙古农业大学,2017,34(5):1027-1034.
APA	张娜,金建新,佟长福,张红玲,&屈忠义.(2017).西藏参考作物蒸散量时空变化特征与影响因素.干旱区研究,34(5),1027-1034.
MLA	张娜,et al."西藏参考作物蒸散量时空变化特征与影响因素".干旱区研究 34.5(2017):1027-1034.