TANG Bin,XIAO Guojie,WU Liang.Variation Characteristics of Air Temperature in Lhasa City in Recent 54 Years[J].Journal of Chengdu University of Information Technology,2019,(01):72-76.[doi:10.16836/j.cnki.jcuit.2019.01.014]
拉萨市近54年气温变化特征
- Title:
- Variation Characteristics of Air Temperature in Lhasa City in Recent 54 Years
- 文章编号:
- 2096-1618(2019)01-0072-05
- Keywords:
- Lhasa; temperature variations; climate cycle; average maximum temperature; average minimum temperature; applied meteorology; climate change
- 分类号:
- P467
- 文献标志码:
- A
- 摘要:
- 为给拉萨地区应对气候变化、防灾减灾提供更多参考,利用拉萨市1960-2013年的气温资料,采用线性趋势分析、Morlet小波分析等方法,研究拉萨市近54 a气温的年、季变化特征和周期变化特征,得到如下结论:在近54 a中,拉萨市年平均气温和各季平均气温都呈现出上升趋势,尤其是在2000年以后增温幅度尤为明显。年平均气温与各季平均气温变化趋势大体一致,但增温幅度存在一定差异,其中冬季增温幅度最大。年平均气温及春、夏、秋三季平均气温虽有着不同尺度的振荡周期,但都经历了暖-冷-暖3个阶段,冬季平均气温则呈现出阶段性周期变化。年平均最高气温在2000年以后增温显著,自2004年以来,拉萨市连续出现偏暖年份。年平均最低气温以20世纪90年代初期为界,可以分为冷、暖两个时期,前期为冷期,后期为暖期。年平均最低气温的增温幅度明显高于年平均最高气温。
- Abstract:
- In order to provide more reference for the Lhasa region to cope with climate change and prevent natural disasters, based on the temperature data from 1960 to 2013 in Lhasa, the annual and seasonal variations and periodic variations of air temperature in Lhasa during the past 54 years were studied using the linear trend analysis method and Morlet wavelet analysis method. The results show thatthe annual average temperature of Lhasa and the average temperature of each season all show an increasing trend in the past 54 years,, especially after 2000. The annual average temperature is in line with the trend of the average temperature in each season, but there is a certain difference in the rate of increase in temperature, with the largest increase in winter temperature. The average annual temperature and the average temperature in spring, summer and autumn have different scales of oscillation cycle, but they all experienced the process of warm-cold-warm. The winter average temperature showed periodic changes. Putting the early 90s as the cut-off point, the annual average minimum temperature can be divided into cold and warm two periods in which the earlier is cold, the latter is warm. The warming rate of annual average minimum temperature is obviously higher than the average annual maximum temperature.
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备注/Memo
收稿日期:2018-04-17基金项目:国家自然科学基金资助项目(41305076); 四川省教育厅科研基金资助项目(2017Z048