Delimitation of the northern boundary of the subtropical zone in China by geodetector
KOU Zhixiang,1,2, YAO Yonghui,1, HU Yufan1,21. State Key Laboratory of Resource and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China 2. University of Chinese Academy of Sciences, Beijing 100049, China
Abstract The boundary between warm temperate and subtropical zones is an important natural boundary in physical regionalization; however there is controversy about the specific location of the boundary. Because the earlier physical regionalization was mainly based on qualitative methods with expert knowledge, and the regionalization objectives and the adopted indicators were different, scholars had differences in the divisions of physical regions. Based on the idea of spatial differentiation, this paper used geodetector to quantitatively examine the impact of climate indicators on the northern boundary of subtropical zone of China, selected the important indicators with a large q value as the dominant factor and refered to the vegetation and soil data to explore the location of the subtropical northern boundary. The results show that: (1) The geodetector method can quickly and accurately screen the main climate indicators of physical regionalization, decide the precise location of the boundary, which improves the technical level of physical regionalization research and the objectivity of physical regionalization. (2) The new boundary delimitated in this paper is located at the altitude of 1000-1600 m on the south slope of the Qinling Mountains in the western part of the study area, slightly south compared to the previous boundaries (it is consistent with that of Zheng Du and Xi Chengfan in the east of Shaanxi); and it is north compared to the previous boundaries (especially in the north of eastern Henan and northern Anhui) in the eastern part of the study area. While maintaining the integrity of natural elements, the new boundary has a larger q value, indicating that it can well reflect the difference between the warm temperate zone and the northern subtropical zone, and the division results are reasonable. Keywords:geodetector;subtropical zone;warm temperate zone;physical regionalization;geographical boundary
PDF (5088KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 寇志翔, 姚永慧, 胡宇凡. 基于地理探测器的中国亚热带北界探讨. 地理研究[J], 2020, 39(12): 2821-2832 doi:10.11821/dlyj020191026 KOU Zhixiang, YAO Yonghui, HU Yufan. Delimitation of the northern boundary of the subtropical zone in China by geodetector. Geographical Research[J], 2020, 39(12): 2821-2832 doi:10.11821/dlyj020191026
Tab. 1 表1 表1中国亚热带北界各区划指标的探测结果(值) Tab. 1Detection results of the regionalization indexes of the northern boundary of the subtropical zone of China (value)
Tab. 2 表2 表2主要区划指标对中国亚热带北界的决定力(值) Tab. 2Geographic detection power of the main regionalization indexes of the northern boundary of the subtropical zone of China (value)
Fig. 3Value range of main indexes for the regionalization of the northern boundary of the subtropical zone of China (Top: east part of the study area; Bottom: west part of the study area)
Tab. 3 表3 表3主要区划指标对中国亚热带北界新界线的决定力(值) Tab. 3Geographic detection power of the main regionalization indexes of the new northern boundary of the subtropical zone of China (value)
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