长江流域资源与环境 >> 2019, Vol. 28 >> Issue (04): 994-1002.doi: 10.11870/cjlyzyyhj201904024

• 自然灾害 • 上一篇    

三峡水库蓄水前后重庆气候变化分析

封瑞雪,刘军旗*, 姚梦辉, 陈根深, 赵剑雄   

  1. (中国地质大学(武汉)教育部长江三峡库区地质灾害研究中心, 湖北 武汉 430074)
  • 出版日期:2019-04-20 发布日期:2019-05-09

Analysis of Climate Change in Chongqing Before and After Impoundment of the Three Gorges Reservoir

FENG Rui-xue, LIU Jun-qi, YAO Meng-hui, CHEN Gen-shen, ZHAO Jian-xiong   

  1. (Three Gorges Research Center for Geo-hazard(Ministry of Education),China University of Geosciences(Wuhan), Wuhan 430074,China)
  • Online:2019-04-20 Published:2019-05-09

摘要: 利用三峡库区重庆沙坪坝站点1987~2017年逐日平均温度、最高温度、最低温度、平均相对湿度和平均能见度的观测资料,分析站点各气象要素的年际变化和蓄水前后的异同。结果表明:年平均温度和年平均最高温度均有增高的趋势,年平均最低温度有微弱的减小趋势;年平均相对湿度呈较大幅度的减小趋势,年平均能见度呈增加趋势。其中,最高温度、相对湿度和能见度通过α=0.01显著性检验。根据突变检验,平均温度、最高温度、最低温度和能见度的突变点分别为2009,2001,2012和2010年。蓄水后多年季节平均最高温度四季均升温,多年季节平均温度和多年季节平均最低温度均冬季降温,春夏秋季增温。蓄水后的年平均相对湿度的年际变化增大,蓄水后的多年季节和月平均相对湿度整体下降。蓄水前后多年季节平均能见度上升,多年月平均能见度除6月降低0.212 km外,其他11个月均上升。 蓄水前后5个要素的频率有效百分比分布与蓄水前后的年及四季的特征相一致。

Abstract: Based on the daily average temperature, maximum temperature, minimum temperature, average relative humidity and average visibility data of Shapingba station in Chongqing from 1987 to 2017, the inter-annual variations of meteorological elements and the similarities and differences before and after impoundment are analyzed. The results showed that the average temperature and the maximum temperature have an increasing trend, and the minimum temperature had a weak decreasing trend from 1987 to 2017. Meanwhile, the average relative humidity decreased significantly, and the average visibility increased. Among them, the maximum temperature, relative humidity and visibility are tested by α=0.01. According to the mutation test, the mutation points of mean temperature, maximum temperature, minimum temperature and visibility were 2009, 2001, 2012 and 2010, respectively. The multi-year seasonal average maximum temperature increases in all seasons, the multi-year seasonal average temperature and the multi-year seasonal mean minimum temperature decreases in winter, and increases in spring, summer and autumn. The inter-annual variation of annual average relative humidity increases after water storage, and the multi-year seasonal and monthly mean relative humidity decreases after water storage. The multi-year seasonal average visibility increased before and after water impoundment. The monthly average visibility decreases by 0.212 km in June, and the other 11 months increases. The frequency cumulative percentage distribution of five meteorological elements is consistent with the annual and seasonal characteristics before and after water storage.


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