ZENG Jian,XU Qinghan,ZHANG Yu,et al.Temporal and Spatial Characteristics of Temperature in Southwest China during the Past Century[J].Journal of Chengdu University of Information Technology,2022,37(04):412-421.[doi:10.16836/j.cnki.jcuit.2022.04.009]
中国西南地区百年气温的时空演变特征
- Title:
- Temporal and Spatial Characteristics of Temperature in Southwest China during the Past Century
- 文章编号:
- 2096-1618(2022)04-0412-10
- Keywords:
- Southwest China; air temperature; climate change; temporal and spatial characteristics; CRU
- 分类号:
- P467
- 文献标志码:
- A
- 摘要:
- 为深入认识中国西南地区过去百年气温变化，采用英国东英吉利大学气候研究中心(CRU)1901-2019年的气温数据，分析中国西南地区百年来的气温趋势和时空分布特征，并与中国其他区域的气温进行对比。结果表明:(1)过去百年西南地区年平均气温、最高和最低气温表现为上升趋势，倾向率分别为0.28 ℃/100 a、0.18 ℃/100 a和0.34 ℃/100 a，最低气温对气候变暖的贡献显著高于最高气温。西南地区经历了两次显著的变暖事件，两次变暖事件所能达到的年均气温极值基本一致，均表现为最低气温的上升速率最大，对气候变暖的贡献更大。但是两次变暖事件在升温速率及升温持续时间方面差异明显。(2)西南地区气温表现出3个明显的空间特征。首先，气温在空间上呈现出极值的空间型，中心位置与四川盆地范围重叠，这对应气温EOF的第一模态(方差贡献为73.9%); 其次，西部高海拔地区比东部低海拔地区的气温低，对应第二模态(方差贡献为9.0%); 最后，气温总体呈现南部高于北部，对应第三模态(方差贡献为7.6%)。(3)西南地区的升温进程与中国其他地区存在非同步性，该地区的升温率相比于其他地区偏小。
- Abstract:
- In order to gain an in-depth understanding of temperature changes in Southwest China over the past 100 years, this paper uses the temperature data of the Climate Research Center of the University of East Anglia(CRU)from 1901 to 2019 to analyze the trend and temporal and spatial distribution of temperature in southwest China in the past hundred years, and compared with those in other regions of China. The results show that:(1)In the past 100 years, the annual average temperature, maximum and minimum temperature in Southwest China show an upward trend, and the tendency rates are 0.28 ℃/100 a, 0.18 ℃/100 a and 0.34 ℃/100 a, respectively. The contribution of the minimum temperature to climate warming is significantly higher than that of the maximum temperature. Southwest China has experienced two significant warming events. The maximum annual average temperature reached by the two warming events are basically the same, but the two warming events have significant differences in the rate and the duration of the temperature rise.(2)The temperature in Southwest China shows three pronounced spatial distribution characteristics. Firstly, the temperature exhibits an extreme spatial pattern. Its maximum occurs at the junction of Sichuan and Chongqing, which corresponds to the first mode of EOF decomposition(73.9% variance contribution). Secondly, the temperature increases with altitude, corresponding to the second mode(with a variance contribution of 9.0%). Thirdly, the temperature is generally higher in the south than that in the north, corresponding to the third mode(with a variance contribution of 7.6%).(3)The warming process in Southwest China is not synchronous with that in other regions of China and Southwest China has the lowest temperature increase rate in China.
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备注/Memo
收稿日期:2021-07-11
基金项目:国家自然科学基金资助项目(42005071); 干旱气象科学研究基金资助项目(IAM202101)