摘要
利用2002～2012年的MODIS积雪产品,按月最大面积合成,分析了蒙古高原积雪覆盖面积的时空变化特征.结果表明,蒙古高原积雪面积总量整体上呈现稍微减少的趋势,年均减少率为13km2;内蒙古和蒙古国的积雪面积变化特征基本上一致;时间上,蒙古高原积雪面积年内变化整体上呈现双峰和单峰的波动特点,最大积雪面积发生在12月或1月,最小积雪面积发生在10月;空间上,近10年内蒙古长时间积雪覆盖区域主要分布在大兴安岭西麓、呼伦贝尔高原以及乌珠穆沁盆地,蒙古国的长时间积雪覆盖区域分布在蒙古阿尔泰山脉、Hovsgoln uulas、杭爱山脉和肯特山脉,其中内蒙古的锡林郭勒草原和乌兰察布草原的积雪面积变化主导着内蒙古的总体积雪面积波动,蒙古国中部的Orhon Selenga River流域和东部草原的积雪面积变化主导着蒙古国的总体积雪面积波动.
The spatial and temporal monitoring of regional snow covered area has an important significance on the determination of regional snow disaster impact scale and disaster level.The spatial and temporal change pattern of snow cover of the Mongolian Plateau was analyzed by 10 seasonal Terra Aqua/MODIS snow products（MOD10A2） collected from year 2002 to 2012 which were composed according to maximum area rule.The results indicated that snow cover of the Mongolian Plateau had a slightly decreasing trend with a annual rate of 13 km2.The snow cover change pattern was similar in the Inner Mongolia and Mongolia.The snow cover change presented 2 peaks and 1 peak fluctuation pattern.The maximum snow cover appeared in December or January and the minimum was in October.The long-term snow cover areas were the Greater Khingan Range,Hulunbeier Plateau and Ujimqin Basin in the Inner Mongolia in recent 10 years,which were the Altayn Nuruu,Hovsgoln uulas,Hangayn Nuruu and henteyn Nuruu in the Mongolia.The snow cover changes of Xilingol and Wulanchabu Grassland were dominant in general snow cover change of the Inner Mongolia.However,the snow cover changes of Orhon Selenga River Basin and the eastern grassland were dominant in the Mongolia.
出处
《内蒙古师范大学学报（自然科学汉文版）》
CAS
北大核心
2012年第5期531-536,共6页
Journal of Inner Mongolia Normal University(Natural Science Edition)
基金
农业部公益性行业项目(200903041)
内蒙自然科学基金资助项目(2012MS0620)
内蒙古科技计划项目"内蒙古数字农牧业GIS集成开发与应用示范"
