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

doi:10.12118/j.issn.1000-6060.2019.04.14

干旱区地理 ›› 2019, Vol. 42 ›› Issue (4): 830-837.doi: 10.12118/j.issn.1000-6060.2019.04.14

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

高瑜莲¹，柳锦宝¹，柳维扬²，于静^1,3，刘志红¹

1成都信息工程大学，四川成都 610225；2塔里木大学植物科学学院，新疆阿拉尔843300；3内蒙古自治区通辽市气象局，内蒙古通辽028000

收稿日期:2019-01-05 修回日期:2019-04-21 出版日期:2019-07-25 发布日期:2019-07-24
通讯作者: 柳锦宝（1979-），男，副教授，硕士研究生导师，主要从事气象地理信息科学研究.E-mail：liujinbao1107@163.com
作者简介:高瑜莲（1995-），女，四川省成都人，硕士研究生，主要从事3S集成与气象应用研究. E-mail：gaoyuliana@163.com
基金资助:
塔里木大学现代农业工程重点实验室开放课题（TDNG20150504）；四川省教育厅重点项目（14ZA0164）；四川省科技支撑计划项目（2015NZ0034）；干旱气象科学研究基金（IAM201402）；国家自然科学基金项目（41561068）

Spatiotemporal variation characteristics of surface evapotranspiration anddrought at the oasis area of the southern Xinjiang in recent 14 years

GAO Yulian¹,LIU Jinbao¹,LIU Weiyang²,YU Jing^1,3,LIU Zhihong¹

1Chengdu University of Information Technology,Chengdu 610225,Sichuan,China; 2Institute of Plant Science and Technology,Tarim University,Aral 843300,Xinjiang,China; 3Inner Mongolia Tongliao Meteorological Bureau,Tongliao 028000,Inner Mongolia,China

Received:2019-01-05 Revised:2019-04-21 Online:2019-07-25 Published:2019-07-24

摘要/Abstract

摘要： 利用2001—2014年MOD16蒸散产品数据、MOD13植被[WTBX]NDVI[WTBZ]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） 2001—2014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。

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

Abstract: 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.

Key words: southern Xinjiang, oasis, surface evapotranspiration, evapotranspiration drought index(EDI), spatial and temporal variation characteristics

高瑜莲, 柳锦宝, 柳维扬, 于静, 刘志红. 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]. 干旱区地理, 2019, 42(4): 830-837.

GAO Yulian, LIU Jinbao, LIU Weiyang, YU Jing, LIU Zhihong. Spatiotemporal variation characteristics of surface evapotranspiration anddrought at the oasis area of the southern Xinjiang in recent 14 years[J]. Arid Land Geography, 2019, 42(4): 830-837.

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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

Spatiotemporal variation characteristics of surface evapotranspiration anddrought at the oasis area of the southern Xinjiang in recent 14 years

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