天山山区大气可降水量的空间聚集特征分析  

Spatial clustering analysis of atmospheric precipitable water in the Tianshan Mountains

作　　者：程红霞[1,2] 梁凤超[2] 李帅[2] 林粤江[3] 

机构地区：[1]中国气象局乌鲁木齐沙漠气象研究所,乌鲁木齐830002 [2]新疆气候中心,乌鲁木齐830002 [3]中国气象局气象干部培训学院新疆分院,乌鲁木齐830013

出　　处：《国土资源遥感》2017年第1期116-121,共6页Remote Sensing for Land & Resources

基　　金：中国气象局沙漠气象基金项目"利用卫星遥感数据研究天山山区大气可降水量时空分布特征"(编号:Sqj2012005);科技支撑项目"新疆吐鲁番哈密地区空中云水资源开发利用"(编号:TUHA201523);中国气象局关键技术集成与应用项目"新疆积雪遥感数据集建设与应用"(编号:CMAGJ2014M62);国家自然科学基金项目"多源遥感数据支持的无资料地区积雪模型参数化研究"(编号:41471358)共同资助

摘　　要：利用MODIS大气可降水量产品和高程数据,采用描述性统计和空间自相关分析方法,定量分析了2003—2013年间天山山区大气可降水量的空间聚集特征。结果表明,近10 a天山山区平均大气可降水量的空间分布格局呈现西多东少的变化,全局空间自相关系数为0.899 8,具有典型的空间聚集模式,即:高值聚集区域占山区总面积的35.94%,集中在高程为2 000 m左右的天山山区周边地区;低值聚集区域占山区总面积的38.79%,主要分布在高程3 000 m以上的中天山和东天山地区;没有高低负相关,仅有较少的低高负相关的聚集方式,占山区总面积的0.05%,只在天山山区周边零星分布。高程与天山山区大气可降水量的空间相关系数为-0.831 3,是空间聚集格局分布与差异的主要原因。Based on the MODIS near infrared atmospheric precipitable water products with the resolution of 1 km ×1 km and elevation data, using GIS spatial analyst and mathematical statistics method, this paper analyzed the spatial distribution and spatial correlation of atmospheric precipitable water in the Tianshan mountains during the period from 2003 to 2013. The results show that the atmospheric precipitable water in western mountain area is higher than the eastern mountain area. The atmospheric precipitable water in the Tianshan mountains has significantly positively correlated and its global spatial autocorrelation index is 0. 899 8. The atmospheric precipitable water in the Tianshan mountains tends to be spatially clustered. The cluster of high values （HH） accounts for 35.94% of the total and are mostly distributed in elevation 2 000 m in surrounding area of Tianshan mountains. The cluster of low values （LL） accounts for 38.79% of the total and concentrated in the central and eastern region of the Tianshan mountains with elevation 3 000 m. The spatial outliers in which a low value is surrounded primarily by high values （LH） are scattered in the Tianshan Mountain. The spatial correlation coefficient between atmospheric precipitable water and elevation is -0.831 3. Elevation is the main reason for the distribution and difference of spatial clustering pattern.

关 键 词：天山山区 大气可降水量 空间自相关 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]