干旱区生态环境知识资源中心(Arid): 近14 a新疆南疆绿洲地区地表蒸散与干旱的时空变化特征研究

Arid

	近14 a新疆南疆绿洲地区地表蒸散与干旱的时空变化特征研究
其他题名	Spatio-temporal variation characteristics of surface evapotranspiration and drought at the oasis area of the southern Xinjiang in recent 14 years
	高瑜莲 1; 柳锦宝 1; 柳维扬 2; 于静 3; 刘志红 1
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2019
卷号	42 期号:4 页码:830-837
中文摘要	利用20012014年MOD16蒸散产品数据、MOD13植被NDVI数据以及常规气象资料,基于植被指数、地表净辐射、气温优化改进混合型线性双源遥感蒸散模型,拟合地表蒸散分析实际蒸散(ET) 、潜在蒸散(PET)时空动态变化特征,结合气象站实测蒸发皿数据验证MOD16数据在绿洲地区的适用性。进一步定义蒸散干旱指数(EDI)并计算△EDI进行研究区干旱特征分析,为大面积特殊地形蒸散估算研究和干旱监测提供一定依据。结果表明: (1) MOD16产品数据与研究区实测蒸发皿数据的相关性很好,通过0. 01显著性检验,基于MOD16数据估算南疆绿洲地区蒸散量检验可行。(2) 20012014年均蒸散量总体变化不大,四季差异明显,ET与PET空间变化趋势相反; ET、PET年均差值较大,绿洲地区地表缺水情况严重。(3) EDI指数绿洲地区年均值总体偏大, △EDI对旱情的反映和干旱程度的判断比较可靠。
英文摘要	Evapotranspiration is estimated based on NDVI,surface net radiation,air temperature by using China monthly meteorological data and MODIS remote sensing data which include evapotranspiration data(MOD16) and normalized difference vegetation index data(MOD13) . Simplify and improve the parameters of mixed linear dual source remote sensing evapotranspiration model to estimate the surface evapotranspiration in oasis region of southern Xinjiang,China. Analysis of spatial and temporal variation characteristics of the actual - evapotranspiration(ET) and potential-evapotranspiration(PET) from 2001 to 2014. Besides,based on the correlation analysis of measured evaporation data from meteorological stations in southern Xinjiang,the applicability of MOD16 products in oasis region is already credible by means of statistical test. According to the evapotranspiration drought index(EDI),the distribution characteristics of drought in oasis of southern Xinjiang is analyzed,and the degree of drought is determined by the EDI anomaly. The results reflect that the annual mean evapotranspiration from 2001 to 2014 shows little change,and these are significant difference among the four seasons. The highest evapotranspiration is in summer and the lowest in winter. The spatial trend of ET and PET is in opposite situation. In addition,there is a huge disparity between the annual value of ET and PET which means the surface water shortage is serious in oasis. Furthermore, the average annual value of EDI index in oasis area is fairly large,the response of EDI anomaly to drought and the judgment of drought degree are reliable. From the perspective of energy and water-balance,this research simplifies the model parameters and enhances the applicability of the model. It has certain guiding significance for large scale areas evapotranspiration estimation and drought monitoring.
中文关键词	新疆南疆 ; 绿洲 ; 地表蒸散 ; 蒸散干旱指数(EDI) ; 时空变化特征
英文关键词	southern Xinjiang oasis surface evapotranspiration evapotranspiration drought index (EDI) spatial and temporal variation characteristics
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:6541298
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239125
作者单位	1.成都信息工程大学, 成都, 四川 610225, 中国; 2.塔里木大学植物科学学院, 阿拉尔, 新疆 843300, 中国; 3.成都信息工程大学;;内蒙古自治区通辽市气象局, ;;, 成都;;通辽, 四川;;内蒙古 610225;;028000, 中国
推荐引用方式 GB/T 7714	高瑜莲,柳锦宝,柳维扬,等. 近14 a新疆南疆绿洲地区地表蒸散与干旱的时空变化特征研究[J],2019,42(4):830-837.
APA	高瑜莲,柳锦宝,柳维扬,于静,&刘志红.(2019).近14 a新疆南疆绿洲地区地表蒸散与干旱的时空变化特征研究.干旱区地理,42(4),830-837.
MLA	高瑜莲,et al."近14 a新疆南疆绿洲地区地表蒸散与干旱的时空变化特征研究".干旱区地理 42.4(2019):830-837.