基于MOD10A1的草原黑灾监测方法研究

摘要

Using MOD10A1 of MODIS remote sensing satellite snow cover product data by methods of extract no snow information, through monitoring the winter drought disaster of one snow season in Inner Mongolia to discussed of monitoring method of grassland winter drought disaster based on the MOD10A1.The results show that: ①During the study period, winter drought disaster has higher frequency in Alxa League, north of Bayannur League;North of Tongliao and Chifeng appear higher frequency too;But, Eastern of Xilingol, Hulunbeier and Xingan League has minimum of frequency.②According to the analysis of month statistical, small area of Inner Mongolia winter drought disaster in December during this study period.And it occurred in a large area of winter drought in October, November and March.③Using MOD10A1 data by methods of extract the no snow information for monitoring results is basically consistent with characteristics of natural climate in Inner Mongolia and previous research, so, this monitoring method can be used in winter drought disaster research.%采用MOD10A1积雪产品,通过时间序列栅格数据提取方法,监测内蒙古一个积雪季(2013年10月初至2014年3月末)的黑灾分布规律的实例,初步探讨了MOD10A1积雪产品在草原黑灾监测中的应用.以连续无雪天数、连续无雪20 d次数、连续无雪40 d的次数和连续无雪60 d的次数作为计算指标,通过进行逐日像元上的计算,获得每个像元上的指标值后进行统计分析.结果表明:①在研究期间,内蒙古阿拉善盟、巴彦淖尔盟北部出现的黑灾频率较高;通辽、赤峰北部降雪多,但气温高,积雪日数短,因此黑灾出现频率也是较大;而锡林郭勒盟东部、呼伦贝尔以及兴安盟出现黑灾的几率最小.②按月份统计分析得出,在这一积雪季中内蒙古12月发生的黑灾面积较小,10、11和3月份发生的黑灾面积较大.③利用MOD10A1数据通过无雪信息提取方法监测的结果与内蒙古的气候自然特征以及前人的研究基本上吻合,因此本文中的监测方法可以在黑灾研究中利用.