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冰川冻土 ›› 2015, Vol. 37 ›› Issue (6): 1524-1533.doi: 10.7522/j.issn.1000-0240.2015.0169

• 冰冻圈与全球变化 • 上一篇    下一篇

2004-2013年“雨城”雅安的降水日变化特征分析

周长艳1, 肖安2, 高文良3   

  1. 1. 中国气象局 成都高原气象研究所/高原与盆地暴雨旱涝灾害四川省重点实验室, 成都 610072;
    2. 江西省气象台, 南昌 330200;
    3. 雅安市气象局, 雅安 625000
  • 收稿日期:2015-08-06 修回日期:2015-11-15 出版日期:2015-12-25 发布日期:2016-05-11
  • 作者简介:周长艳(1979-),女,四川凉山人,副研究员,2004年在南京信息工程大学获硕士学位,主要从事气候、气候变化相关研究.E-mail:zcy001124@163.com.
  • 基金资助:
    国家自然科学基金项目(41305082);中国气象局成都高原气象研究所开放实验室基金课题(BROP201513)资助

Analysis of the diurnal variation features of precipitation in Ya'an as the rainy city, 2004-2013

ZHOU Changyan1, XIAO An2, Gao Wenliang3   

  1. 1. Institute of Plateau Meteorology, China Meteorological Administration/Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province, Chengdu 610072, China;
    2. Jiangxi Provincial Meteorological Observatory, Nanchang 330200, China;
    3. Ya'an Meteorological Bureau, Ya'an 625000, Sichuan, China
  • Received:2015-08-06 Revised:2015-11-15 Online:2015-12-25 Published:2016-05-11

摘要: 利用2004-2013年逐小时降水自动观测数据分析了"雨城"雅安降水的日变化特征.结果表明:近10 a来雅安降水主要表现出单峰型分布特征, 峰值出现在北京时间24:00, 谷值出现在15:00, 夜间降水占年总降水量的74.5%; 降水出现频次也呈现单峰型分布, 峰值出现在01:00, 谷值出现在14:00, 夜间降水次数占全年总次数的66%; 23:00-02:00是雅安最易发生降水的时段, 14:00-16:00 则是最不易出现降水时段. 降水量和降水出现频次日变化形势均表明, 雅安一年四季都具有显著的夜雨特征. 近10 a来, 雅安6 h以上的长持续时间降水事件主要发生在17:00-04:00, 产生的过程降水量占总降水量的80.4%, 对雅安降水总量的贡献占有绝对优势; 持续时间≥24 h的降水事件10 a 累计次数达到74次, 累积降水量达到2 166.8 mm, 占总降水量的14%, 是长持续时间降水事件中对总降水量贡献最大的, 该类事件的影响值得关注.

关键词: 日变化, 逐小时降水量, 频次, 持续时间

Abstract: Hourly precipitation data observed in Ya'an, which is located in the eastern part of the Tibetan Plateau and famous as the Rainy City, from 2004 to 2013 are used to investigate the diurnal variation features of precipitation. It is found that the diurnal pattern of precipitation in Ya'an shows a single peak, with the peak value at 24:00 and the valley value at 15:00, and the night precipitation accounts for 74.5% of the annual total. The diurnal curve of precipitation frequency in Ya'an also shows a single peak, with the peak at 1:00 and the valley value at 14:00, and the number of precipitation appearing at night accounts for 66.0% of the total precipitation frequency. The hourly distribution of precipitation and precipitation frequency in Ya'an both show a remarkable feature of frequent night rain. From 2004 to 2013, the occurrence number of short-term precipitation events is primarily, accounting for 60% of the total precipitation events, but the precipitation amount of the short-term precipitation events only accounts for 19.6% of total precipitation. The long duration precipitation events mainly occur in 17:00-4:00, with the precipitation amount accounting for 80.4% of the total precipitation. There were 74 precipitation events with precipitation duration more than 24 h from 2004 to 2013, with cumulative precipitation reaching 2 166.8 mm, accounting for 14% of the total precipitation, which is worthy of attention.

Key words: diurnal variation, hourly precipitation, frequency, duration

中图分类号: 

  • P426.6