摘要
内蒙古东部是干旱灾害的高发区,对遥感干旱监测技术的需求十分迫切。为研究不同遥感干旱指数在内蒙古东部地区的适用性,利用2016和2017年4月下旬至9月下旬内蒙古东部地区MODIS数据,计算出温度状态指数(temperature condition index,TCI)、植被状态指数(vegetation condition index,VCI)、温度植被干旱指数(temper ature vegetation dryness index,TVDI)和植被供水指数(vegetation supply water index,VSWI)4种常用遥感干旱指数,并将其与气象干旱综合指数(meteorological drought composite index,MCI)和土壤相对湿度数据进行比较。结果表明:受牧草返青期波动影响,生长季初期TCI和VCI对遥感干旱监测结果偏差较大,生长季中、后期各遥感干旱指数对干旱的描述基本一致。VCI与MCI和土壤相对湿度的相关性最高。MCI与VCI和VSWI在中、低覆盖度草原的一致性较高,而MCI与TCI在中、高覆盖度草原的一致性较高。结合各遥感干旱指数特点,建议内蒙古东部在生长季初期首选VSWI进行遥感干旱监测,而在生长季中、后期选择VCI或TCI进行遥感干旱监测。
The eastern part of Inner Mongolia is a high risk area for drought disasters,it is necessary to use remote sens ing to monitor drought conditions.In order to study the applicability of different remote sensing drought indices in eastern Inner Mongolia,MODIS data in the eastern part of Inner Mongolia from late April to late September 2016 were used to cal culate four commonly used remote sensing drought indices:temperature condition index(TCI),vegetation condition index(VCI),temperature vegetation drought index(TVDI)and vegetation supply water index(VSWI),and compared with me teorological drought composite index(MCI)and soil relative humidity data.The results show that TCI and VCI had a large deviation in drought monitoring at the beginning of the growing season due to the different reviving periods.The drought in dices were basically consistent with drought in the middle and late growth seasons.VCI and MCI had the highest correlation with soil relative humidity.The consistency of MCI with VCI and VSWI was higher in the middle and low coverage grass land,while the highest consistency with TCI was toward to the middle and high coverage grassland.Combined with the characteristics of various drought indices,VSWI is recommended for drought monitoring in eastern Inner Mongolia during the early growing season,and VCI or TCI is recommended for drought monitoring in the middle and late growth season.
作者
曲学斌
吴昊
越昆
刘朋涛
李翕然
QU Xue bin;WU Hao;YUE Kun;LIU Peng tao;LI Xi ran(Hulun Buir Meteorological Bureau,Hulun Buir 021008,China;Lanzhou Institute of Arid Meteorology,China Meteorological Administration/Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province/Key Laboratory of Arid Climate Change and Reducing Disaster of China Meteorological Administration,Lanzhou 730020,China;Inner Mongolia Ecology and Agro meteorology Center,Hohhot 010051,China;Morin Dawa Meteorological Bureau of Daur Autonomous Banner,Hulun Buir 162850,China)
出处
《生态与农村环境学报》
CAS
CSCD
北大核心
2020年第1期81-88,共8页
Journal of Ecology and Rural Environment
基金
干旱气象科学研究基金(IAM201706)
中国气象局气候变化专项(CCSF201721)
中国气象局预报员专项(CMAYBY2018-013)
关键词
干旱
遥感
干旱指数
内蒙古东部
drought
remote sensing
drought index
eastern Inner Mongolia
