全月球撞击坑的空间分布模式

发布时间：2018-05-18 02:29

本文选题：月球撞击坑 + 空间分析　；参考：《武汉大学学报(信息科学版)》2017年04期

【摘要】：以基于嫦娥探月工程公开数据识别的全月球直径大于500m的106 016个撞击坑为研究对象,划分月海、月陆、经向、纬向研究区域,采用核密度估计与Ripley’s K函数的规格化函数—L函数相结合的GIS点模式分析方法,研究全月球撞击坑的空间模式。研究结果表明,全月球撞击坑分布形成了三个聚集中心,南北两极核密度低,东半球核密度高,西半球核密度低,北半球核密度高,南半球核密度低;月陆地区的核密度大于月海地区的核密度,在撞击坑直径范围1~500km范围内,月陆地区的撞击坑数量是月海地区平均水平的5倍;全月球撞击坑的L(d)曲线随距离变化的过程中在总体上呈现先增后减的态势,经向、纬向研究区位在不同空间尺度上的聚集程度存在差异。
[Abstract]:Taking 106,016 craters whose total lunar diameter is greater than 500m, which are identified based on the open data of the Chang'e lunar exploration project, as research objects, the study areas of lunar sea, lunar land, meridional and zonal are divided into three parts: lunar sea, lunar land, meridional and zonal. The spatial model of the lunar crater is studied by using the GIS point model analysis method which combines the kernel density estimation with the normalized function -L function of the Ripley's K function. The results show that there are three aggregation centers in the whole lunar crater. The density of the two polar nuclei in the north and south is low, the density of the nucleus in the old hemisphere is high, the density of the nucleus in the western hemisphere is low, the density of the nucleus in the northern hemisphere is high, and that in the southern hemisphere is low. The nuclear density of the lunar land area is greater than that of the lunar sea area. The number of impact craters in the lunar land area is 5 times of the average level in the lunar sea area within the 1~500km range of impact crater diameter. The LCD curve of the whole lunar crater increases first and then decreases as a whole during the course of the distance variation. There are differences in the aggregation degree between the meridional and zonal study locations on different spatial scales.
【作者单位】：中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室;中国科学院大学;
【基金】：国家自然科学基金(41571388,41171332)~~
【分类号】：P184.5

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