J4 ›› 2010, Vol. 28 ›› Issue (2): 179-183.

• 论文 • 上一篇    下一篇

石家庄春季首场透雨的时空分布特征

卞 韬1,2李国翠2,孙 云2车少静2   

  1. 1.兰州大学大气科学学院,甘肃 兰州 730000;2. 河北省石家庄市气象局,河北 石家庄 050001
  • 收稿日期:2009-11-18 修回日期:2010-01-25 出版日期:2010-06-30 发布日期:2010-06-30
  • 作者简介:卞韬(1977-),女,河北鹿泉人,工程师,现从事天气预报工作

Temporal and Spatial Features of the First Soaking Rain in Spring in Shijiazhuang

BIAN Tao1,2 , LI Guocui 2, SUN Yun2 , CHE Shaojing2
  

  1. 1.College of Atmospheric Science, Lanzhou University, Lanzhou 730000, China;2. Shijiazhuang Meteorological Bureau of Hebei Province, Shijiazhuang  050081, China
  • Received:2009-11-18 Revised:2010-01-25 Online:2010-06-30 Published:2010-06-30

摘要:

利用石家庄地区17个站1972-2006年的降水资料,采用EOF、REOF和线性趋势分析了春季首场透雨的时空分布特征,采用相关分析分析了首场透雨日期与春季、夏季降水的关系,并对首场透雨的典型环流特征进行了分析。结果表明:石家庄春季首场透雨出现日期基本上从东南、西北向内部依次推迟;透雨日期偏早或偏晚的地方,均是易出现异常天气的地区;近35 a,石家庄地区首场透雨出现日期呈现出提前趋势,每10 a提前4-5 d左右;在首场透雨偏早(晚)的年份,春季降水偏多(少),夏季降水偏少(多);西风槽和高空低涡是造成石家庄首场透雨的主要天气系统。

关键词: 透雨日期, 变化特征, 相关分析

Abstract:

Based on daily precipitation data of 17 stations in Shijiazhuang during 1972-2006, the spatial and temporal variation features of the first soaking rain in spring were analyzed by using the methods of EOF, REOF and linear trend, and the relations between the first soaking rain date and spring, summer rainfall using the method of correlation analysis, as well as the typical circulation features of the first soaking rain were also analyzed. Results show that the dates of the first soaking rain in spring delayed generally from southeast and northwest to the centre of the area. The unusual weather  occurs much easily in the place where the first soaking rain date is earlier or later. In recent 35 years, the first soaking rain dates were becoming earlier with a trend of 4-5 days per decade. The precipitation was generally larger (smaller) in spring and smaller (larger) in summer when the first soaking rain was earlier (later) than normal. The dominant circulation characteristics for the first soaking rain in Shijiazhuang are westerly trough and mid-troposphere vortex.

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