高原气象

高原气象 >

2018 , Vol. 37 >Issue 6: 1628 - 1642

DOI: https://doi.org/10.7522/j.issn.1000-0534.2018.00093

论文

一次冷性停滞型西南低涡结构的演变特征

  • 陈贵川 ,
  • 谌芸 ,
  • 王晓芳 ,
  • 朱岩 ,
  • 李强 ,
  • 张勇
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  • 重庆市气象科学研究所, 重庆 401147;国家气象中心, 北京 100081;中国气象局武汉暴雨研究所, 湖北 武汉 430074;重庆市气象台, 重庆 401147

收稿日期: 2018-05-22

  网络出版日期: 2018-12-28

基金资助

国家重点研发计划项目（2018YFC1507200）；国家自然科学基金项目（91637211）；中国气象局气象关键技术集成与应用（面上）项目（CMAGJ2015M49）

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The Developmental Characteristics of the Structure of a Stationery Cold Southwest Vortex

  • CHEN Guichuan ,
  • SHEN Yun ,
  • WANG Xiaofang ,
  • ZHU Yan ,
  • LI Qiang ,
  • ZHANG Yong
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  • ChongqingInstitute of Meteorological Sciences, Chongqing 401147, China;National Meteorological Centre, Beijing 100081, China;Institute of Heavy Rain, China Meteorological Administration. Wuhan, Wuhan 430074, Hubei, China;Chongqing Meteorological Bureau, Chongqing 401147, China

Received date: 2018-05-22

  Online published: 2018-12-28

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摘要

利用常规气象观测资料、NCEP（National Centers for Environmental Prediction，美国国家环境预报中心）再分析资料、雷达资料、卫星以及区域站资料等对2015年8月16日08：00（北京时，下同）至18日20：00四川盆地持续性大暴雨过程作了系统分析。结果表明：在西太平洋副热带高压（下称西太副高）阻塞形势下，高原涡东侧和西太副高西北侧的正涡度平流共同为西南低涡提供动力条件，前侧温度槽叠加在中低层暖性浅薄天气系统上加强了对流不稳定，冷空气缓慢侵入造成冷性停滞型西南低涡持续发展；西南低涡中的降水通过凝结潜热释放作用与西南低涡相伴增强；西南低涡成熟阶段，高低层正涡度柱几乎垂直耦合，水平流场形态上表现为近圆形，700 hPa温度、水汽及能量场均表现为"S"形非对称形态，有利于中低层维持向东北部的暖湿输送机制，这是纬向降水强于经向的重要因素；盆地地形条件下，纬向降水主要是中心中尺度对流系统MCSs（Mesoscale Convective Systems）两次稳定发展的结果，降水集中在西南低涡暖切变线南侧，地面静止锋附近，而经向降水主要是两次冷锋MCSs降水，位于西南低涡低槽前部；西南低涡中MCSs活动分为八个阶段，在动力机制维持情况下，西南低涡南侧MCSs通过影响水汽输送对中心MCSs发展形成制约机制，西南低涡东北部和东南部降水呈现此消彼长的"跷跷板"发展特征。

关键词： 西南低涡; 高原涡; 大暴雨; 中尺度对流系统; 演变特征

本文引用格式

陈贵川 , 谌芸 , 王晓芳 , 朱岩 , 李强 , 张勇 . 一次冷性停滞型西南低涡结构的演变特征[J]. 高原气象, 2018 , 37(6) : 1628 -1642 . DOI: 10.7522/j.issn.1000-0534.2018.00093

Abstract

By using data from conventional soundings and surface observation, NCEP reanalysis, radar, satellite and regional automatic stations, an incessant heavy rainstorm from 16 to 18 August 2015 in Sichuan Basin was systematically analyzed. The results showed that being blocked by the West Pacific Subtropical High (WPSH), the positive vorticity advection to the eastern side of the plateau vortex and the northwestern side of the WPSH provide the dynamic conditions for the Southwest Vortex(SV), the front temperature trough superimposed on the middle and low warm shallow synoptic systems strengthens the convective instability, the cold air invading slowly results in the stationery cold SV sustainable development. The precipitation in SV is enhanced by condensation latent heat release. In the maturation stage of SV, the vertical positive vorticity column at all levels is almost vertically coupled. The horizontal flow pattern approximately forms as a circle, while the temperature, moisture and energy fields at 700 hPa asymmetrically shape as "S". It is beneficial to maintain the heat and moisture transport mechanism to the northeast region of Chongqing at lower level, which is a crucial factor explaining why horizontal precipitation is stronger than that of meridian. Located in the basin area, the precipitation results from the stable development of central MCSs twice, clustering to the southern side of the warm shear of the SV, near the stationery front on the surface. In contrast, meridian precipitation is the outcome of MCSs triggered by cold front twice, located ahead of the trough of SV. The life history of MCSs could be divided into eight stages. With the maintenance of dynamic pump, the MCSs to the southern side of SV inhibits the evolution of central MCSs by influencing vapor transfer, resulting in the "see-saw" feature of the development of precipitation to the northeast and southeast of SV.

Key words： Southwest Vortex (SV; plateau vortex; heavy rainstorm; mesoscale convective; developmental charac

参考文献

[1]Chen S J, Lorenzo D, 1984. Numerical prediction of the heavy rainfall vortex over eastern Asia monsoon region[J]. J Met Soc Japan, 62(5):730-747.
[2]Kuo H L, 1974. Further studies of the parameterization of the influence of cumulus convection on large-scale flow[J]. J Atmos Sci, 31(5):1232-1240.
[3]Kuo Y H, Cheng L S, Anthes R A, 1986. Mesoscale analyses of the Sichuan flood catastrophe, 11-15 July 1981[J]. Mon Wea Rev, 114(11):1984-2003.
[4]Kuo Y H, Cheng L S, Bao J W, 1988. Numerical simulation of the 1981 Sichuan flood. PartI:Evolution of a mesoscale southwest vortex[J]. Mon Wea Rev, 116(12):2481-2504.
[5]Wang W, Kuo Y H, Thomas T W, 1993. A diabatically driven mesoscale vortex in the lee of the Tibetan Plateau[J]. Mon Wea Rev, 121(9):2542-2561.
[6]Chen G C, Chen Y, Zhang Y, et al, 2013. Causes analysis of the southwest vortex extremely heavy rainfall on 21 july 2012[J]. Meteor Mon, 39(12):1529-1541.<br/>陈贵川, 谌芸, 张勇, 等, 2013. "12·7·21"西南涡极端强降雨的成因分析[J].气象, 39(12):1529-1541.
[7]Chen Y R, Li Y Q, 2013. Characteristics of mesoscale convective system and its effects on short-time severe rainfall in sichuan basin during 21-22 july 2012[J]. Meteor Mon, 39(7):848-860.<br/>陈永仁, 李跃清, 2013. "12·7·22"四川暴雨的MCS特征及对短时强降雨的影响[J].气象, 39(7):848-860.
[8]Chen Z M, 1989. The preliminary study of effect of environment flow fields on movement of southwest vortex[J]. Plateau Meteor, 8(4):301-312.<br/>陈忠明, 1989.环境场作用与西南低涡移动的初步分析[J].高原气象, 8(4):301-312.
[9]Chen Z M, Miao Q, Min W B, 1998. A case analysis on mesoscale structure of severe southwest vortex[J]. Quart J Appl Meteor, 9(3):273-282.<br/>陈忠明, 廖强, 闵文彬, 1998.一次强烈发展西南低涡的中尺度结构分析[J].应用气象学报, 9(3):273-282.
[10]Chen Z M, Min W B, Miao Q, et al, 2004. A case study on coupling interaction between plateau and southwest vortexes[J]. Plateau Meteor, 23(1):75-80.<br/>陈忠明, 闵文彬, 缪强, 等, 2004.高原涡与西南低涡相互耦合作用的个例诊断[J].高原气象, 23(1):75-80.
[11]Duan H X, Lu W S, Bi B G, 2008. Impact of the condensation heating and surface heat flux on a rainstorm event of southwest vortex[J]. Plateau Meteor, 27(6):1315-1321.<br/>段海霞, 陆维松, 毕宝贵, 2008.凝结潜热与地表热通量对一次西南低涡暴雨影响分析[J].高原气象, 27(6):1315-1321.
[12]Gu Q Y, Zhou C H, Qing Q, et al, 2008. Mesoscale characteristics analysis of severe torrential rain caused by a southwestern low vortex process[J]. Meteor Mon, 34(4):39-47.<br/>顾清源, 周春花, 青泉, 等, 2008.一次西南低涡特大暴雨过程的中尺度特征分析[J].气象, 34(4):39-47.
[13]Hao L P, Zhou J, Kang Lan, 2016. Weather analyses and numerical study of Southwest China vortex and its induced heavy rainfall[J]. Plateau Meteor, 35(5):1182-1190. DOI:10.7522/j.issn. 1000-0534.2015.00046.<br/>郝丽萍, 周瑾, 康岚, 2016.西南涡暴雨天气过程分析和数值模拟试验[J].高原气象, 35(5):1182-1190.
[14]He G B, 2012. Review of the southwest vortex research[J]. Meteor Mon, 38(2):155-163.<br/>何光碧, 2012.西南低涡研究综述[J].气象, 38(2):155-163.
[15]Huang F J, 1986. A composite analysis of the southwest vortex[J]. Scientia Atmospherica Sinica, 10(4):402-408.<br/>黄福均, 1986.西南低涡的合成分析[J].大气科学, 10(4):402-408.
[16]Li C, Li Y Q, Jiang X W, 2017. Mechanism of long lifespan Sichuan Basin vortex's activity influence the precipitation in Sichuan-Chongqing region on summer[J]. Plateau Meteor, 36(3):685-696. DOI:10.7522/j.issn. 1000-0534.2016.00064.<br/>李超, 李跃清, 蒋兴文, 2017.夏季长生命史盆地涡活动对川渝季节降水的影响[J].高原气象, 36(3):685-696.
[17]Li G P, Wan J, Lu J H, 1991. A potential mechanism of the warm vortex genesis in southwest china[J]. Quart J Appl Meteor, 2(1):91-99.<br/>李国平, 万军, 卢敬华, 1991.暖性西南低涡形成的一种可能机制[J].应用气象学报, 2(1):91-99.
[18]Li G Q, Chen R R, Yang G J, et al, 1976. A preliminary simulative experiment of the vortex to the southeast of Tibetan Plateau[J]. China Science (3):286-294.<br/>李国庆, 陈瑞荣, 杨广基, 等, 1976.青藏高原东南部低涡的初步模拟试验[J].中国科学(3):286-294.
[19]Li L, Liu H W, Lu S H, 2017. Interannual and interdecadal variations analysis of the spring Southwest Vortex[J]. Plateau Meteor, 36(6):1512-1520. DOI:10.7522/j.issn. 1000-0534.2017.00016.<br/>李黎, 刘海文, 吕世华, 2017.春季西南低涡年际和年代际变化特征分析[J].高原气象, 36(6):1512-1520.
[20]Luo S W, 1977. An analysis of formation of the dynamic vortex to the east side of Tibetan Plateau[J]. Meteor Sci Technol (suppl):54-65.<br/>罗四维, 1977.青藏高原东侧动力性低涡形成机理的分析[J].气象科技(增刊):54-65.
[21]Luo S W, 1992. A study of several synoptic systems on Tibetan Plateau and adjacent areas[M]. Beijing:China Meteorological Press, 56-96.<br/>罗四维, 1992.青藏高原及其邻近地区几类天气系统的研究[M].北京:气象出版社, 56-96.
[22]卢敬华, 1986.西南低涡概论[M].北京:气象出版社, 58, 129-146.
[23]Lu J H, 1988. Introduction to the southwest vortex[M]. BeiJing:China Meteotological Press, 58, 129-146.
[24]Lu P, Li Y Q, Zheng W P, et al, 2014. Analysis and numerical simulation of southwest vortex on continuous heavy rain processes in south china[J]. Plateau Meteor, 33(6):1457-1467. DOI:10.7522/j.issn. 1000-0534.2013.00137.<br/>卢萍, 李跃清, 郑伟鹏, 等, 2014.影响华南持续性强降水的西南涡分析和数值模拟[J].高原气象, 33(6):1457-1467.
[25]Peng X D, Cheng L S, 1994. A case numerical study on the evolution of the low vortex and shear-1ine on the east side of the plateau:Ⅱ mesoscale numerical simulation[J]. Journal of Lanzhou University (Natural Sciences), 30(1):124-131.<br/>彭新东, 程麟生, 1994.高原东侧低涡切变线发展的个例数值研究:Ⅱ中尺度数值模拟[J].兰州大学学报(自然科学), 30(1):124-131.
[26]Tao S Y, 1980. China Storms[M]. BeiJing:China Science Press, 1-7.<br/>陶诗言, 1980.中国之暴雨[M].北京:科学出版社, 1-7.
[27]Xu W J, Zhang Y C, 2017. Numerical study on the feedback between latent heating and convection in a Qinghai-Tibetan plateau vortex[J]. Plateau Meteor, 36(3):763-775. DOI:10.7522/j.issn. 1000-0534.2016.00061.<br/>许威杰, 张耀存, 2017.凝结潜热加热与对流反馈对一次高原低涡过程影响的数值模拟[J].高原气象, 36(3):763-775.
[28]Zhao P, Sun S Q, 1991. Numerical simulation and diagnosis of the formation of SW Vortex Ⅰ:an analysis of numerical simulation of the effects of topography and latent heat on SW Vortex[J]. Scientia Atmospherica Sinica, 15(6):46-52.<br/>赵平, 孙淑清, 1991.一次西南低涡形成过程的数值试验和诊断(一):地形动力作用和潜热释放作用对西南低涡影响的数值试验对比分析[J], 大气科学, 15(6):46-52.
[29]Zhao P, Hu C Q, Sun S Q, 1992. Numerieal simulation and diagnosis of the formation process of SW vortex Ⅱ:The diagnosis of vorticity equation and energy conversion function[J]. Scientia Atmospherica Sinica, 16(2):177-184.<br/>赵平, 胡昌琼, 孙淑清, 1992.一次西南低涡形成过程的数值试验和诊断Ⅱ:涡度方程和能量转换函数的诊断分析[J].大气科学, 16(2):177-184.
[30]Zhao S X, Fu SM, 2007. An anaiysis on the southwest vortex and its environment fields during heavy rainfali in eastem sichuan province and chongqing in september 2004[J]. Chinese J Atmos Sci, 31(6):1059-1075.<br/>赵思雄, 傅慎明, 2007.2004年9月川渝大暴雨期间西南低涡结构及其环境场分析[J].大气科学, 31(6):1059-1075.
[31]Zhao Y C, Wang Y H, 2010. A case study on plateau vortex inducing southwest vortex and producing extremely heavy rain[J]. Plateau Meteor, 29(4):819-831.<br/>赵玉春, 王叶红, 2010.高原涡诱生西南涡特大暴雨成因的个例研究[J].高原气象, 29(4):819-831.
[32]Yang S N, Zhang F H, Xu J, et al, 2016. Mesoscale convective systems and characteristics of environment field of a heavy rainfall process occurred in Sichuan Basin[J]. Plateau Meteor, 35(6):1476-1486. DOI:10.7522/j.issn. 1000-0534.2015.00105.<br/>杨舒楠, 张芳华, 徐珺, 等, 2016.四川盆地一次暴雨过程的中尺度对流及其环境场特征[J].高原气象, 35(6):1476-1486.
[33]Wang X F, Cui C G, 2011. A number of advances of the research on heavy rain mesoscale convective systems[J]. Torrential Rain Disaster, 30(2):97-106.<br/>王晓芳, 崔春光, 2011.中尺度对流系统研究的若干进展[J].暴雨灾害, 30(2):97-106.
[34]Wei T J, Xue J J, 1996. The meesoscale structure characteristics of southwest vortex over Jiang-Huai River areas[J]. Plateau Meteor, 15(4):456-463.<br/>韦统键, 薛建军, 1996.影响江淮地区的西南涡中尺度结构特征[J].高原气象, 15(4):456-463.
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