| 中国南北过渡带范围的地理表达及定量探测 |
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| 引用本文： | 李亚男,刘钢军,刘德新,秦耀辰.中国南北过渡带范围的地理表达及定量探测[J].地理研究,2021,40(7):1857-1869. |
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| 作者姓名： | 李亚男 刘钢军 刘德新 秦耀辰 |
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| 作者单位： | 1.河南大学黄河中下游数字地理技术教育部重点实验室／地理与环境学院,开封 4750042.郑州旅游职业学院,郑州 4514643.河南大学黄河文明与可持续发展研究中心暨黄河文明传承与现代文明建设河南省协同创新中心,开封 4750014.澳大利亚皇家墨尔本理工大学理学院地理空间科学系,墨尔本,澳大利亚 3000 |
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| 基金项目： | 国家自然科学基金项目(41671536);国家自然科学基金项目(41907382);黄河文明省部共建协同创新中心重大项目(2020M19) |
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| 摘 要： | 气候变化下中国南北过渡带的动态变化及地域范围探测是识别农业生产敏感区、研究农业适应行为的基础。前人基于“自上而下”或“自下而上”的方法,采用不同的划界指标对中国南北过渡带的范围进行了探索,但对气候变化下南北过渡带范围的地理表达及其地域范围的定量探测较少涉及。采用1951—2018年2400多个国家气象站点气温和降水的逐日观测数据,以800 mm等降水量线、1月0℃均温、日均温≥10℃积温、日均温≥10℃日数和干燥度指数0.5为划界指标,运用ArcGIS栅格计算和均值-标准差对中国南北过渡带进行地理表达。结果表明,中国的南北分界是一条宽窄不一的过渡带,各划界指标的等值线在气候变化下变动明显,各气象要素的大致变动范围西南段较东北段更为稳定,日均温≥10℃积温和干燥度指数的变化幅度大于800 mm等降水量线和1月0℃均温。确定的中国南北过渡带的极端最北界自西向东依次穿过礼县、耀县、韩城、安泽、涉县、静海县;极端最南界自西向东依次穿过北川、宁强、西乡、房县、淅川、罗山、商城、定远、临安县。该范围内提取的637个县域中,位于南北过渡带气候变化稳定区的县域256个,位于气候变化敏感区的县域187个。研究可为中国南北过渡带农业生产适应气候变化提供科学依据。
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| 关 键 词： | 气候变化 南北过渡带 范围 地理表达 渔网法 |
| 收稿时间： | 2020-07-20 |
Geographical expression and quantitative exploration of the China's north-south transitional zone |
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| LI Yanan,LIU Gangjun,LIU Dexin,QIN Yaochen.Geographical expression and quantitative exploration of the China's north-south transitional zone[J].Geographical Research,2021,40(7):1857-1869. |
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| Authors: | LI Yanan LIU Gangjun LIU Dexin QIN Yaochen |
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| Abstract: | Under the climate change, the dynamic change of China′s north-south transitional zone and the detection of its regional scope are the basis of identifying the sensitive areas of agricultural production and studying the adaptive behavior of agriculture. Based on the "top-down" or "bottom-up" method, the predecessors used different demarcation indicators to explore the scope of the north-south transitional zone in China. However, the geographical expression and quantitative detection of the range of the China′s north-south transitional zone under climate change are rarely involved. The daily observation data of temperature and precipitation of more than 2400 national meteorological stations from 1951 to 2018 are used. The 800 mm precipitation isoline, the 0℃ average temperature of January, the accumulated temperature with daily average temperature ≥10 ℃, the number of days with daily average temperature ≥ 10 ℃ and the aridity index are used as the demarcation indexes. The ArcGIS grid calculation and the mean standard deviation are used to explain the geographic expression of the China′s north-south transitional zone. The results show that the boundary between the north and the south of China is a transitional zone with different widths. The isolines of each demarcation index change obviously under the climate change. The general range of variation of each meteorological element in the southwest is more stable than that in the northeast. The range of change of accumulated temperature with daily average temperature ≥ 10 ℃ and aridity index is greater than that of the 800 mm precipitation isoline and that of the 0 ℃ average temperature of January. The northernmost boundary of China′s transitional zone passed through Lixian, Yaoxian, Hancheng, Anze, Shexian and Jinghai counties from west to east. The southernmost boundary of China's transitional zone passed through Beichuan, Ningqiang, Xixiang, Fangxian, Xichuan, Luoshan, Shangcheng, Dingyuan and Lin'an counties from west to east. Among the 637 counties extracted in this area, 256 counties are located in the climate change stable area of the north-south transitional zone, while 187 counties are located in the climate change sensitive area. The research can provide scientific basis for agricultural production in the north-south transitional zone to adapt to climate change in China. |
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| Keywords: | climate change north-south transitional zone range geographical expression Fishnet |
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