摘要
以新疆为研究区,利用2015年逐日积雪产品MOD10A1/MYD10A1数据,通过积雪持续时间比率法提取研究区雪线,并运用克里金插值法建立新疆区域雪线场,在此基础上对研究区雪线空间分布特征进行研究。经分析得出：普通克里格插值法建立的新疆雪线场MAE（平均绝对误差）为4.49 m,RMSE（均方根误差）为48.93 m,其误差满足本研究的精度需求;从整个研究区分析,雪线高程呈现出北低南高,西高东低的布局,其值在3 000-5 600m,具有典型的经度地带性和纬度地带性的分布特点,同时雪线场南部分布密集北部稀疏;从局部区域分析,天山山区雪线高程南高北低、东高西低,昆仑山区中间高、两边低,阿尔泰山区西北向东南依次降低;各个区域雪线分布差异较大,其内部分布复杂,雪线高程高低交错。
In this paper study,the daily snow product MOD10 A1/MYD10 A1 data in 2015 and the snow cover duration ratio method were used to extract the snowlines in Xinjiang,and the Kriging interpolation was used to establish the snowline fields in the study area. On which the spatial distribution of snowlines was studied. The results revealed that the mean absolute error（ MAE） of snowline field established by the ordinary Kriging interpolation in Xinjiang was 4. 49 m,the root mean square error（ RMSE） was 48. 93 m,and the errors could satisfy the accuracy requirements of this study. The analyzed results of the whole study area revealed that the snowline elevation was low in the north and east but high in the south and west,it varied in a range of 3 000-5 600 m a. s. l.,its longitude and latitude zonal distribution patterns were typical,and the snowline fields were dense in the south but sparse in the north. Locally,the snowline elevation was high in the southern and eastern parts but low in the northern and western parts of the Tianshan Mountains; it was high in the central part but low on both sides of the Kunlun Mountain; and it decreased gradually from the northwest to the southeast of the Altay Mountain. The regional snowline distribution was quite different,the internal snowline distribution was complex,and the difference of snowline elevation was significant.
作者
张连成
胡列群
李帅
侯小刚
郑照军
ZHANG Lian-cheng;HU Lie-qun;LI Shuai;HOU Xiao-gang;ZHENG Zhao-jun(Xinjiang Uygur Autonomous Region Climate Center,Urumqi 830002,Xinjiang,China;Xinjiang Meteorological Service Centre,Ururmli 830002,Xinjiang,China;Urumqi Institute of Desert Meteorology,China Meteorological Administration,Urumqi 830002,Xinjiang,China;National Meteorological Satellite Center,Beijing 100081,China)
出处
《干旱区研究》
CSCD
北大核心
2018年第4期840-845,共6页
Arid Zone Research
基金
国家自然基金(41505077)
风云三号(02)批气象卫星地面应用系统工程应用示范项目“FY-3卫星资料在新疆融雪型洪水监测及风险预估中的应用示范”
国家自然科学基金(41471358)
关键词
雪线场
空间分布
积雪持续时间比率法
新疆
snowline field
spatial distribution
snow cover duration ratio method
Xinjiang
