当前位置:文库下载 > 所有分类 > 农林牧渔 > 林学 > 河北省南部强对流天气的时空分布及对流参数统计特征
侵权投诉

河北省南部强对流天气的时空分布及对流参数统计特征

利用河北南部石家庄、邢台、邯郸三个地区50个县(市)气象站1999~2008年10年的雷暴、大风、冰雹和暴雨等观测资料以及由MICAPS3探空资料导出的同期对流参数,对这一区域强对流天气事件的时空变化特征及相应对流参数的统计特征进行了分析总结。结果表明,1999~2008期间河北南部年平均雷暴日数为74.8 d,其中雷暴大风有28.2 d,冰雹有9.4 d,暴雨天气有12.3 d;10年中1、2和12月份均未出现强对流天气

Climate Change Research Letters 气候变化研究快报, 2013, 2, 39-45

doi:10.12677/ccrl.2013.21007 Published Online January 2013 (http://www.wenkuxiazai.com/journal/ccrl.html)

Spatial and Temporal Distributions of Severe Convective Events and Statistical Characteristics of Convection Parameters over the Southern Part of Hebei Province

Congmei Wang1, Guocui Li2, Xiuxia Tian3, Yunling Yang1

Xingtai Weather Office of Hebei Province, Xingtai

Shijiazhuang Weather Office of Hebei Province, Shijiazhuang

3

Handan Weather Office of Hebei Province, Handan

Email: cmwang6565@http://www.wenkuxiazai.com

Received: Oct. 13th, 2012; revised: Nov. 8th, 2012; accepted: Nov. 17th, 2012

2

1

Abstract: Using the observational thunderstorm, thunderstorm gale, hail and rainstorm data at 50 meteorological sta-tions in Xingtai, Shijiazhuang, Handan Districts of Hebei Province, China, and the convection parameters drawn from the MICAPS3 system during 1999-2008, spatial and temporal distributions of the severe convective events and several convective parameters have been analyzed. It has been shown that, on average, there are 74.8 thunderstorm days in a year over South Hebei, including 28.2 thunderstorm gale days, 9.4 hail days, and 12.3 rainstorm days. Strong convec-tive weather does not appear in January, February and December. Most thunderstorm and heavy rain events appear in July, and most thunderstorm gale and hail appear in June. Strong convective weather usually occurs in the afternoon. Apparently, compared to the eastern part, more thunderstorm and hail events appear in the western region of the study area. Thunderstorm gales often appear in the central part, and the heavy rain events in the northwestern and southeastern parts. For the strong convective weather, the thermal and energy convection parameters, such as TT, K, T850~500 and CAPE, are all numerically higher. But the parameter of T850~500 for rainstorm is relatively small, indicating that the rain-storm occurrence is not caused by any strong vertical temperature variation. The dynamical parameter of the strong weather threaten index is always showing a larger value, but the Switzerland thunderstorm index always appears to be smaller, indicating those power parameters may be used as reference indexes to forecast strong convection potential. The small SI stability index (no larger than 1) and large θse850~500 (no less than 5) can always characterize the strong convection events. In addition, the convection-condensation height is lower, that is, the CCL value is larger for thunder-storm, hail and heavy rain events, but higher for thunderstorm gales. The heights where the temperature reaches 0 and 20 Degrees Celsius can be regarded as characterized heights for hail. The parameters show that convection seems to be stronger in July than in other months.

Keywords: Strong Convective Weather; Spatial and Temporal Distribution; Convection Parameters

河北省南部强对流天气的时空分布及对流参数统计特征

王丛梅1,李国翠2,田秀霞3,杨允凌1

河北省邢台市气象局,邢台 河北省石家庄市气象局,石家庄 3

河北省邯郸市气象局,邯郸 Email: cmwang6565@http://www.wenkuxiazai.com

收稿日期:2012年10月13日;修回日期:2012年11月8日;录用日期:2012年11月17日

2

1

摘 要:利用河北南部石家庄、邢台、邯郸三个地区50个县(市)气象站1999~2008年10年的雷暴、大风、冰雹和暴雨等观测资料以及由MICAPS3探空资料导出的同期对流参数,对这一区域强对流天气事件的时空变化特征及相应对流参数的统计特征进行了分析总结。结果表明,1999~2008期间河北南部年平均雷暴日数为74.8 d,其中雷暴大风有28.2 d,冰雹有9.4 d,暴雨天气有12.3 d;10年中1、2和12月份均未出现强对流天气,雷暴

Copyright © 2013 Hanspub

39

第1页

猜你喜欢

返回顶部