基于地理探测器的中国陆地热带北界探讨

doi:10.11821/dlxb201701011

Abstract

Abstract:

The northern border of the tropical zone of China has been the focus of studies on comprehensive physical regionalization. Based on different indexes and methods, the border was delineated by different scholars, but their results varied greatly. Based on the Geodetector model and regionalization thought of spatial stratified heterogeneity, the northern border of the tropical zone of China's mainland was investigated. Climatic elements were used as dominant demarcation partitioning indexes, combined with auxiliary indexes such as soil and multiple cropping types. The key results were as follows: (1) Using Geodetector, the northern border of the tropical zone was delineated. From west to east, the border goes through Lincang, Simao, Yuxi and Gejiu in Yunnan, Baise, Mashan, Guigang and Wuzhou in Guangxi, Zhaoqing, Guangzhou, Huizhou, Heyuan and Meizhou in Guangdong, and Zhangzhou, Quanzhou and Putian in Fujian. It generally agrees with the 12℃ isotherm of the coldest monthly mean temperature, soil border between lateritic red soil and red soil, and border of double cropping rice or its continuous thermophile dry framing and single (double) cropping rice or its continuous chimonophilous dry framing. (2) The q average value of all indexes for the border was 0.40. Using this model, regionalization principles—homogeneity of the within-strata value and heterogeneity of the between-strata value—were satisfied. The border meets the requirements of zonal heterogeneity between tropical and subtropical zones. Therefore, it is reasonable to use Geodetector in studies of comprehensive physical regionalization, and it can provide high-precision technical support.

Key words: Geodetector, the northern border of tropical zone, comprehensive physical regionalization, China

Yuxiang DONG, Qian XU, Ren YANG, Chengdong XU, Yuying WANG. Delineation of the northern border of the tropical zone ofChina's mainland using Geodetector[J].Acta Geographica Sinica, 2017, 72(1): 135-147.

Figures/Tables 8

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区划方案	最冷月均温	极端最低气温	日均温≥10 °C积温	多年平均月均温	日均温≥ 10 °C天数	日最低气温≤2 °C天数	最低日均温	日最低气温≤0 °C天数
黄秉维方案	0.24	0.20	0.11	0.10	0.10	0.07	0.07	0.05
曾昭璇方案	0.11	0.47	0.37	0.37	0.41	0.29	0.35	0.19
余显芳方案	0.05	0.15	0.10	0.09	0.07	0.05	0.09	0.03
何大章方案	0.20	0.20	0.15	0.19	0.07	0.19	0.19	0.19
任美锷方案	0.52	0.52	0.34	0.35	0.41	0.30	0.32	0.20
郑度方案	0.23	0.16	0.09	0.09	0.07	0.05	0.07	0.03
平均值	0.23	0.28	0.19	0.20	0.19	0.16	0.18	0.12

最冷月均温(℃)	q值	多年平均月均温(℃)	q值	极端最低气温(℃)	q值
12	0.60	19	0.57	0	0.38
13	0.48	20	0.53	1	0.30
14	0.34	21	0.51	2	0.23
15	0.26	22	0.31	3	0.16
16	0.22	23	0.17	4	0.11
				5	0.08

指标	最冷月均温	极端最低气温	日均温≥10 °C积温	多年平均月均温	日均温≥ 10 °C天数	日最低气温≤2 °C天数	最低日均温	日最低气温≤0 °C天数	平均
q值	0.57^***	0.50^***	0.42^***	0.44^***	0.40^***	0.29^***	0.41^***	0.18^***	0.40
平均值	0.22	0.27	0.18	0.19	0.17	0.14	0.17	0.10	∕
最大值	0.52	0.52	0.37	0.37	0.41	0.30	0.35	0.20	∕
最小值	0.05	0.15	0.09	0.09	0.07	0.05	0.07	0.03	∕

Delineation of the northern border of the tropical zone ofChina's mainland using Geodetector

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