科研之友
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摘要
Regionalization, spatiotemporal differentiation and uncertainty are featured in the process of humanistic-natural interaction in Chinese mountain areas, making them typical mountainous transitional geospace (MTGs). Quantitative identification of MTGs types and consequent differentiation characteristics analysis can build a solid decision-making foundation for high-quality development of land space in mountainous areas under the background of rural revitalization strategy of China. This study introduced a spatiotemporal variability index based on the concept of geographic uncertainty, which was designed to work out identification, delineation and division of MTGs, and then it used the Geodetector to analyze the driving factors spectrum of the geographic spatiotemporal variability in each division of MTGs. It concludes the following points: (1) The total area of MTGs was 238.32×104 km2 (about 1/4 of the land surface area of China), with MTGs variability index in a decreasing trend from the First Gradient Terrain to the Third Gradient Terrain of China. (2) MTGs in China could be divided into 12 segmentations, of which the area of the Kunlun-Qilian Mountains subzone is the largest. (3) Humanistic driving factors had the strongest analytical power on spatiotemporal variability of population density and land-use intensity. The analytical power of the basic topographic variables, such as DEM, DEM_Relief, DEM_Slope and Topography index, had significant analytical effect on the spatiotemporal variability of vegetation coverage (NDVI) and MTGs geographic uncertainty, and the analytical driving force of altitude and night lighting brightness was the strongest among all the driving factors. (4) Generally, the spatiotemporal dynamics of human factors, such as the time variations and the spatial heterogeneities of humanistic geographical features, had a significant shaping effect on MTGs in the southeastern China, whereas in the northwestern China MTGs was mainly driven by the temporal variations of natural geographical features and the spatial heterogeneities of humanistic geographical features. This research provides an insight for quantitative analysis of geographical uncertainty and diversity in MTGs of China, and reveals the regionality of the human-nature interaction.
- 出版日期2022
- 单位中国科学院
