摘要: |
该文利用2014年12月—2019年2月共5a冬季地面观测资料,寻找滇黔准静止锋在黔西南冬季出现的规律,并对准静止锋锋后黔西南天气要素进行了分析,得出如下结论:①2014—2018年冬季滇黔准静止锋在黔西南累计出现187 d,占冬季总天数的41.6%,其中1月最多(17.6 d),12月次之,2月最少;Ⅰ型静止锋出现最多(16.4 d),Ⅱ型次之,3类静止锋均在1月出现最多;近5 a冬季3类静止锋均是中等强度出现最多,强静止锋次之,其中强静止锋及中等强度静止锋均在1月出现最多。②Ⅰ型静止锋背景下黔西南高、低温分别比冬季平均低4.2 ℃、2 ℃;Ⅰ型静止锋背景下雨日的发生概率为66%,明显高于冬季平均的39%;相对湿度88%,比冬季平均81%明显偏高;日照与冬季平均相比明显减少,仅兴义和望谟有0.1 h;平均风2.1 m/s,比冬季平均偏大0.3 m/s,但最大风却比冬季平均偏小0.2 m/s。 |
关键词: 滇黔准静止锋;黔西南;分布规律;要素特征 |
DOI: |
投稿时间:2020-11-22 |
基金项目:黔西南州科技局项目(2019-1-06):云贵准静止锋对黔西南冬春气温的影响;国家自然科学基金(41865005):贵州凝冻灾害事件特征和成因及其预报预测研究 |
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Characteristics of Winter Elements in Southwest Guizhou under the Background of Quasi-stationary Front in Yunnan and Guizhou |
WANG Fen,TANG Haopeng,YANG Chunyan,FAN Qian,LI Yang,LIU Xiang |
(Qianxinan Meteorological Bureau of Guizhou Province,Xingyi 562400 ,China) |
Abstract: |
Based on the surface observation data of five years from December 2014 to February 2019, this paper seeked the regularity of the occurrence of the quasi-stationary front in the southwest of Guizhou, and analyzed the weather elements in the southwest of Guizhou after the quasi-stationary front,the results are as follows:① The quasi-stationary front of Yunnan and Guizhou last for 187 days in southwest Guizhou, accounting for 41.6% of the total winter days, with the highest in January (17.6 days) , and the lowest in December;Type I stationary front (16.4 days) is the commonest one and type II the second. Three types of stationary fronts all occur the most frequently in January;the medium intensity stationary front are the most in the winter , the strong stationary fronts are the second, and the strong stationary fronts and the medium intensity stationary fronts are all the most in January. ② The highest and lowest temperatures in the southwest of Guizhou are lower 4.2 ℃ and 2 ℃ lower than the winter average under the type I ; the probability of rainy day in the background of type I stationary front was 66% , significantly higher than the average of 39% in winter;the relative humidity was 88% , higher than the winter average of 81% ; the sunshine was reduced less obviously compared with the winter average; the mean wind was 2.1 m/s, higher than the winter average of 0.3 m/s. However, the maximum wind is 0.2 m / s , smaller than the winter average. |
Key words: Quasi-stationary Front of Yunnan and Guizhou;southwest of Guizhou;distribution law;element characteristics |