[1]梁红丽,祁文,陈艳,等.一次极端降水过程中不同相态降水过程的锋生特征对比研究[J].自然灾害学报,2018,(02):149-160.[doi:10.13577/j.jnd.2018.0218]
 LIANG Hongli,QI Wen,CHEN Yan,et al.A comparative study on frontogenesis characteristics in different phase during an extreme precipitation process[J].,2018,(02):149-160.[doi:10.13577/j.jnd.2018.0218]
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一次极端降水过程中不同相态降水过程的锋生特征对比研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2018年02期
页码:
149-160
栏目:
出版日期:
2018-04-28

文章信息/Info

Title:
A comparative study on frontogenesis characteristics in different phase during an extreme precipitation process
作者:
梁红丽1 祁文2 陈艳3 周宁芳4 连钰1
1. 云南省气象台, 云南 昆明 650034;
2. 安徽省铜陵市气象局, 安徽 铜陵 244100;
3. 云南省气象科学研究所, 云南 昆明 650034;
4. 国家气象中心, 北京 100081
Author(s):
LIANG Hongli1 QI Wen2 CHEN Yan3 ZHOU Ningfang4 LIAN Yu1
1. Yunnan Meteorological Observatory, Kunming 650034, China;
2. Tongling Meteorological Office of Anhui, Tongling 244100, China;
3. Meteorological Science Institute of Yunnan, Kunming 650034, China;
4. National Meteorological Center, Beijing 100081, China
关键词:
极端降水异常性不同相态锋生函数锋面次级环流
Keywords:
extreme precipitationabnormalismdifferent phasefrontogenesis functionfront secondary circulation
分类号:
P458;X43
DOI:
10.13577/j.jnd.2018.0218
摘要:
2015年1月8日夜间~10日,云南出现暴雨和暴雪并存天气,是1961年以来1月最极端的一次降水过程,利用NCEP/NCAR再分析资料,对不同相态降水过程中锋生作用及其伴随的次级环流特征进行对比分析,探讨强雨雪产生机制。结果表明,孟加拉湾至滇南的水汽输送偏离气候平均度达3σ,滇南锋区中心强度为-5×10-5K·m-1,异常冷暖气流在云南交汇造成此次强雨雪天气。进一步地锋生函数分析表明,2015年初强雨雪中,暴雨前期低层水平辐合及上升运动加剧,使降水出现峰值,此后水平变形场(主要是切变变形)的增长,使锋生作用维持,但强度明显减弱;对于暴雪而言,第一次降雪峰值的形成主要是倾斜项作用;第二次降雪峰值的形成则主要是水平变形项中的伸长变形增长和倾斜项作用。次级环流上升支处的强上升运动为强雨雪天气提供了有利的动力条件。
Abstract:
A rainstorm and snowstorm weather occurred in Yunnan from the evening of 8 to 10 January 2015, which was the most extreme precipitation process in January since 1961. Based on NCEP/NCAR reanalysis data, frontogenetic function and characteristics of front secondary circulation in different phase were diagnosed. Furthermore, the production mechanism of strong rain and snow was discussed. It was showed that the water vapor transport from Bay of Bengal to South Yunnan deviating from climatological mean degree reached 3σ, center intensity of frontal zone in South Yunnan was -5×10-5K·m-1, namely anomaly cold and warm airflow intersected in Yunnan, which made this strong rain and snow weather. Furthmore, frontogenesis function analysis showed that at the prophase of heavy rain, horizontal convergence in lower layer and ascending motion aggravated, which made precipitation reach peak. Thereafter, horizontal deformation field, especially shear deformation’s increasing made frontogenetic function maintain, but strength was obviously weak. For the snowstorm, the first peak formation of snowfall was mainly inclined item function, while the second, they were horizontal deformation and inclined items’ functions, among horizontal deformation item, it was mostly growth of elongation deformation. In addition, strongly ascending motion in front secondary circulation’s ascending branch provided favorably dynamic condition to strong rain and snow weather.

参考文献/References:

[1] 张腾飞, 鲁亚斌, 张杰, 等. 2000年以来云南4次强降雪过程的对比分析[J]. 应用气象学报, 2007, 18(1):64-72. ZHANG Tengfei, LU Yabin, ZHANG Jie, et al. Contrast analysis of 4 heavy snow events in Yunnan since 2000[J]. Journal of Applied Meteorological Science, 2007, 18(1):64-72. (in Chinese)
[2] 郭荣芬, 高安生, 杨素雨. 低纬高原两次冬季南支槽强降水的对比分析[J]. 大气科学学报, 2010, 33(1):82-88. GUO Rongfen, GAO Ansheng, YANG Suyu. Comparision analysis of two heavy rain processes on the plateau at low latitude caused by southern branch trough in winter[J]. Transactions of Atmospheric Sciences, 2010, 33(1):82-88. (in Chinese)
[3] 索渺清, 丁一汇. 南支槽与孟加拉湾风暴结合对一次高原暴雪过程的影响[J]. 气象, 2014, 40(9):1033-1047. SUO Miaoqing, DING Yihui. A case study on the effect of southern branch trough in the subtropical westerlies combined with storm over the Bay of Bengal on plateau snowstorm[J]. Meteorological Monthly, 2014, 40(9):1033-1047. (in Chinese)
[4] 许美玲, 梁红丽, 金少华, 等. 昆明冬季降水相态识别判据研究[J]. 气象, 2015, 41(4):474-479. XU Meiling, LIANG Hongli, JIN Shaohua, et al. Study on identification criterion for precipitation phase in winter Kunming[J]. Meteorological Monthly, 2015, 41(4):474-479. (in Chinese)
[5] 杨晓亮, 王咏青, 杨敏, 等. 一次暴雨与特大暴雪并存的华北强降水过程分析[J]. 气象, 2014, 40(12):1446-1454. YANG Xiaoliang, WANG Yongqing, YANG Min, et al. Analysis on severe heavy precipitation event with rainstorm and large blizzard in north China[J]. Meteorological Monthly, 2014, 40(12):1446-1454. (in Chinese)
[6] 易笑园, 李泽椿, 陈涛, 等. 2007年3月3-5日强雨雪过程中的干冷空气活动及其作用[J]. 南京气象学院学报, 2009, 32(2):306-313. YI Xiaoyuan, LI Zechun, CHEN Tao, et al. Activities of cold-dry air and its impact on heavy rain-snow processes in north China during March 3-5, 2007[J]. Journal of Nanjing Institute of Meteorology, 2009, 32(2):306-313. (in Chinese)
[7] 翟盘茂, 潘晓华. 中国北方近50年湿度和降水极端事件变化[J]. 地理学报, 2003, 58(7s):1-10. ZHAI Panmao, PAN Xiaohua. Change in extreme temperature and precipitation over northern China during the second half of the 20th century[J]. Acta Geographica Sinica, 2003, 58(7s):1-10. (in Chinese)
[8] 孙军, 谌芸, 杨舒楠, 等. 北京721特大暴雨极端性分析及思考(二)极端性降水成因初探及思考[J]. 气象, 2012, 38(10):1267-1277. SUN Jun, CHEN Yun, YANG Shunan, et al. Analysis and thinking on the extremes of the 21 July 2012 torrential rain in Beijing part:preliminary causation analysis and thinking[J]. Meteorological Monthly, 2012, 38(10):1267-1277. (in Chinese)
[9] Hoskins B J, Bret herton F P. Atmospheric frontogenesis model:Mathematical formulation and solution[J]. J Atmos Sci, 1972(29):11-37.
[10] 高守亭. 大气中尺度运动的动力学基础及预报方法[M]. 北京:气象出版社, 2007:43-58. GAO Shouting. Dynamical Foundation and Forecast Method of Atmospheric Mesoscale Motion[M]. Beijing:China Meteorological Press, 2007:43-58. (in Chinese)
[11] 李兆慧, 王东海, 王建捷, 等. 一次暴雪过程的锋生函数和急流-锋面次级环流分析[J]. 高原气象, 2011, 30(6):1505-1515. LI Zhaohui, WANG Donghai, WANG Jianjie, et al. Analysis on frontogenesis function and jet-front secondary circulation in a snowstorm process[J]. Plateau Meteorology, 2011, 30(6):1505-1515. (in Chinese)

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备注/Memo

备注/Memo:
收稿日期:2016-05-18;改回日期:2017-05-02。
基金项目:国家自然科学基金项目(41365007,41365006)
作者简介:梁红丽(1973-),女,正高级工程师,硕士,主要从事灾害性天气研究.E-mail:lhl1678@163.com
更新日期/Last Update: 1900-01-01