doi: 10.12013/qxyjzyj2017-018 |
2016年初萍乡地区两次降雪过程对比分析 |
Comparative Analysis on Two Snow Processes of 2016 in Pingxiang |
摘要点击 496 全文点击 397 投稿时间:2016-12-05 修订日期:2017-03-16 |
查看HTML全文 查看全文 查看/发表评论 下载PDF阅读器 |
基金: 2015年江西省气象局青年人才培养项目“基于动力因子的小城市暴雨预报研究” |
中文关键词: 大雪,水汽条件,动力条件,不稳定条件,可降水量 |
英文关键词: heavy snow vapor condition dynamic condition instability condition GPS/PWV |
|
引用:李侃,叶小峰,戴晶晶.2017,2016年初萍乡地区两次降雪过程对比分析[J].气象与减灾研究,40(2):117-123 |
<
中文摘要: |
利用常规气象观测资料对萍乡地区2016年1月和2月两次相临的降雪过程进行对比分析,结果表明,1月过程的冷空气强度、动力条件、水汽条件及不稳定条件均优于2月过程,但1月过程仅出现零星小雪,2月过程却出现了大雪。采用ECWMF高分辨率资料和GPS/MET可降水量资料对两次过程进行更深入分析发现,1月过程的水汽条件、上升运动条件以及对称不稳定条件有明显的衰减,而2月过程中的水汽条件、上升运动条件以及对称不稳定条件都有所增强,且持续时间较长。 |
Abstract: |
Based on the conventional observation data, comparative analysis were performed to study two snow processes in January and February 2016 in Pingxiang. The results showed that the cold air strength and the dynamic, vapor and instability conditions of the snow process in January were better than those of the snow process in February. However, there were only occasional flurries occurred in January, while heavy snow emerged in February. The further studies were undertaken by using high resolution data of ECWMF and the GPS/MET precipitable water vapor data. The results indicated that the vapor, upward motion and symmetric instability conditions in January were significantly weakened, while those favorable conditions for snowfall in February were enhanced to a certain degree and persisted for a long time. |