全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
大气科学  2014 

副高外围对流雨带中的对流—对称不稳定及锋生的诊断分析

DOI: 10.3878/j.issn.1006-9895.2013.12206

Keywords: 副高外围,对流雨带,对流—对称不稳定,倾斜对流

Full-Text   Cite this paper   Add to My Lib

Abstract:

对2009年8月25日西太平洋副热带高压(简称副高)西北外围对流雨带的云图特征进行了分析,利用WRF3.3中尺度模式对对流雨带的发生发展进行了数值模拟,在模拟较成功的基础上,利用模式输出结果分析了对流雨带发生时的对称不稳定、对流不稳定、惯性不稳定以及锋生等。结果表明:副高外围对流雨带由若干具有一定间隔的对流单体构成,单体在随对流层中层气流的移动中逐渐发展直至消亡。对流雨带的西北侧为宽广的带状斜压云系,东南侧为副高控制的晴空区。对流雨带发生于对流层低层(700hPa以下)的对称不稳定区,700~500hPa存在对流不稳定和弱的惯性不稳定。随着对流的发展,700~500hPa的对流不稳定度明显减弱,而惯性不稳定明显加强。对流层低层为倾斜上升区,中高层为垂直上升区,左侧对应下沉气流,呈现明显的倾斜对流和垂直对流的混和特征,体现了对流—对称不稳定的作用。对流层低层(750hPa以下)锋生的存在提供了对流—对称不稳定能量释放的有利条件。对流雨带与500~800hPa等厚度线基本平行,而与500hPa等高线存在明显的交角,雨带中的对流单体随环境气流移动,雨带符合与对称不稳定相联系的带状降水特征。上述结论对实际预报副高外围对流雨带的位置和走向具有指示意义。

References

[1]  Jascourt S D, Lindstrom S S, Seman C J, et al. 1988. An observation of banded convective development in the presence of weak symmetric stability [J]. Mon. Wea. Rev., 116: 175-191.
[2]  Jurewicz M L Sr, Evans M S. 2004. A comparison of two banded, heavy snowstorms with very different synoptic settings [J]. Wea. Forecasting, 19: 1011-1028.
[3]  寇正, 陆汉城. 2005. 中尺度对流系统演变中的非线性对流对称不稳定 [J]. 大气科学, 29 (4): 636-644. Kou Zheng, Lu Hancheng. 2005. The nonlinear convective-symmetric instability during the development of mesoscale convective system [J]. Chinese Journal of Atmospheric Sciences (in Chinese), 29 (4): 636-644.
[4]  Lagouvardos K, Kotroni V. 1995. Upper-level frontogenesis: Two case studies from the FRONTS 87 Experiment [J]. Mon. Wea. Rev., 123: 1197-1206.
[5]  Lagouvardos K, Lemaitre Y, Scialom G. 1993. Dynamical structure of a wide cold-frontal cloudband observed during FRONTS 87 [J]. Quart. J. Roy. Meteor. Soc., 119: 1291-1319.
[6]  刘还珠, 王维国, 邵明轩, 等. 2007. 西太平洋副热带高压影响下北京区域性暴雨的个例分析 [J]. 大气科学, 31 (4): 727-734. Liu Huanzhu, Wang Weiguo, Shao Mingxuan, et al. 2007. A case study of the influence of the western Pacific subtropical high on the torrential rainfall in Beijing area [J]. Chinese Journal of Atmospheric Sciences (in Chinese), 31 (4): 727-734.
[7]  刘健文, 郭虎, 李耀东, 等. 2005. 天气分析预报物理量计算基础 [M]. 北京: 气象出版社, 121pp. Liu Jianwen, Guo Hu, Li Yaodong, et al. 2005. Basis of Physics Calculation in Weather Analysis and Prediction (in Chinese) [M]. Beijing: China Meteorological Press, 121pp.
[8]  刘子臣, 张健宏, 梁生俊. 1997. 中尺度对称不稳定的诊断应用 [J]. 南京气象学院学报, 20 (3): 133-137. Liu Zichen, Zhang Jianhong, Liang Shengjun. 1997. Diagnosis and application of meso symmetric instability [J]. Journal of Nanjing Institute of Meteorology (in Chinese), 20 (3): 133-137.
[9]  陆汉城,钟科,张大林,等. 2002.1992.年Andrew飓风眼壁区倾斜上升运动发展的可能机制--非线性对流对称不稳定 [J].大气科学,26(1): 83-90. Lu Hancheng,Zhong Ke,Zhang Dalin,et al. 2002. A possible developing mechanism of the slantwise updraft in the eyewall of the 1992 Hurricane Andrew-Nonlinear convective and symmetrical instability [J]. Chinese Journal of Atmospheric Sciences (in Chinese),26(1): 83-90.
[10]  Maddox R A. 1980. Meso-scale convective complex [J]. Bull. Amer. Meteor. Soc., 61: 1374-1387.
[11]  Bennetts D A, Hoskins B J. 1979. Conditional symmetric instability—A possible explanation for frontal rainbands [J]. Quart. J. Roy. Meteor. Soc., 105: 945-962.
[12]  边清河,丁治英,董金虎,等. 2006. “96.8” 华北暴雨数值模拟与稳定性分析 [J].气象,32(8): 17-22. Bian Qinghe,Ding Zhiying,Dong Jinhu,et al. 2006. Numerical simulation for “96.8” Huabei heavy rain and its stability analysis [J]. Meteorological Monthly (in Chinese),32(8): 17-22.
[13]  程艳红, 陆汉城. 2006. 对流对称不稳定的发展演变和环流特征 [J]. 热带气象学报, 22 (3): 253-258. Cheng Yanhong, Lu Hancheng. 2006. The evolution and circulation feature of convective-symmetric instability [J]. Journal of Tropical Meteorology (in Chinese), 22 (3): 253-258.
[14]  Clark J H E, James R P, Grumm R H. 2002. A reexamination of the mechanisms responsible for banded precipitation [J]. Mon. Wea. Rev., 130: 3074-3086.
[15]  丁一汇, 沈新勇. 1994. 对称不稳定理论及其应用问题(一)线性理论 [J]. 应用气象学报, 5 (3): 361-368. Ding Yihui, Shen Xinyong. 1994. A review of the symmetric instability theory and its application. Part Ⅰ: Linear theory [J]. Journal of Applied Meteorological Science (in Chinese), 5 (3): 361-368.
[16]  杜楠, 钟玮, 陆汉城, 等. 2008. 一次四川暴雨过程的非线性对流—对称不稳定分析 [J]. 南京气象学院学报, 31 (3): 308-316. Du Nan, Zhong Wei, Lu Hancheng, et al. 2008. The analysis of nonlinear convective-symmetric instability in a rainstorm in Sichuan [J]. Journal of Nanjing Institute of Meteorology (in Chinese), 31 (3): 308-316.
[17]  Ducrocq V. 1993. Adiabatic and viscous simulations of symmetric instability: Structure, evolution, and energetics [J]. J. Atmos. Sci., 50: 23-42.
[18]  费建芳, 伍荣生, 宋金杰, 等. 2009. 对称不稳定理论的天气分析与预报应用研究进展 [J]. 南京大学学报(自然科学版),45 (3): 323-333. Fei Jianfang, Wu Rongsheng, Song Jinjie, et al. 2009. Advances in synoptic analysis and application of symmetric instability theory [J]. Journal of Nanjing University (Natural Sciences) (in Chinese), 45 (3): 323-333.
[19]  Fischer C, Lalaurette F. 1995a. Meso-β-scale circulations in realistic fronts. I: Steady basic state [J]. Quart. J. Roy. Meteor. Soc., 121: 1255-1283.
[20]  Fischer C, Lalaurette F. 1995b. Meso-β-scale circulations in realistic fronts. II: Frontogenetically forced basic states [J]. Quart. J. Roy. Meteor. Soc., 121: 1285-1321.
[21]  Gray S L, Thorpe A J. 2001. Parcel theory in three dimensions and the calculation of SCAPE [J]. Mon. Wea. Rev., 129: 1656-1672.
[22]  Hoskins B J. 1974. The role of potential vorticity in symmetric stability and instability [J]. Quart. J. Roy. Meteor. Soc., 100: 480-482.
[23]  Martin J E. 1998. The structure and evolution of a continental winter cyclone. Part II: Frontal forcing of an extreme snow event [J]. Mon. Wea. Rev., 126: 329-348.
[24]  蒙伟光, 王安宇, 李江南, 等. 2004. 华南暴雨中尺度对流系统的形成及湿位涡分析 [J]. 大气科学, 28 (3): 330-341. Meng Weiguang, Wang Anyu, Li Jiangnan, et al. 2004. Moist potential vorticity analysis of the heavy rainfall and mesoscale convective systems in South China [J]. Chinese Journal of Atmospheric Sciences (in Chinese), 28 (3): 330-341.
[25]  Novak D R, Bosart L F, Keyser D, et al. 2004. An observational study of cold season-banded precipitation in northeast U. S. cyclones [J]. Wea. Forecasting, 19: 993-1010.
[26]  Novak D R, Waldstreicher J S, Keyser D, et al. 2006. A forecast strategy for anticipating cold season mesoscale band formation within eastern U. S. cyclones [J]. Wea. Forecasting, 21: 3-23.
[27]  Persson P O G, Warner T T. 1991. Model generation of spurious gravity waves due to inconsistency of the vertical and horizontal resolution [J]. Mon. Wea. Rev., 119: 917-935.
[28]  Persson P O G, Warner T T. 1993. Nonlinear hydrostatic conditional symmetric instability: Implications for numerical weather prediction [J]. Mon. Wea. Rev., 121: 1821-1833.
[29]  Reuter G W, Yau M K. 1993. Assessment of slantwise convection in ERICA cyclones [J]. Mon. Wea. Rev., 121: 375-386.
[30]  Schultz D M, Schumacher P N. 1999. The use and misuse of conditional symmetric instability [J]. Mon. Wea. Rev., 127: 2709-2732.
[31]  Schultz D M, Knox J A. 2007. Banded convection caused by frontogenesis in a conditionally, symmetrically, and inertially unstable environment [J]. Mon. Wea. Rev., 135: 2095-2110.
[32]  Seltzer M A, Passarelli R E, Emanuel K A. 1985. The possible role of symmetric instability in the formation of precipitation bands [J]. J. Atmos. Sci., 42: 2207-2219.
[33]  Shou Shaowen, Li Yaohui. 2008. Study on moist potential vorticity and symmetric instability during a heavy rain event occurred in the Jiang-Huai valleys [J]. Adv. Atmos. Sci., 16 (2): 314-321.
[34]  盛春岩, 杨晓霞. 2002. 一次罕见的山东暴雪天气的对称不稳定分析 [J]. 气象, 28 (3): 33-37. Sheng Chunyan, Yang Xiaoxia. 2002. Symmetry instability analysis of an unusual storm snow in Shandong Province [J]. Meteorological Monthly (in Chinese), 28 (3): 33-37.
[35]  王建中, 丁一汇. 1995. 一次华北强降雪过程的湿对称不稳定性研究 [J]. 气象学报, 53 (4): 451-460. Wang Jianzhong, Ding Yihui. 1995. Research of moist symmetric instability in a strong snowfall in North China [J]. Acta Meteorologica Sinica (in Chinese), 53 (4): 451-460.
[36]  王亦平,陆维松,潘益农,等. 2008.淮河流域东北部-次异常特大暴雨的数值模拟研究Ⅱ: 不稳定条件及其增强和维持机制分析 [J].气象学报,66(2): 177-189. Wang Yiping,Lu Weisong,Pan Yinong,et al. 2008. Numerical simulation of a torrential rain in the northeast of Huaihe basin. Part Ⅱ: Instability conditions and the mechanism of intensification and maintenance [J]. Acta Meteorologica Sinica (in Chinese),62(2): 177-189.
[37]  Xu Q. 1986. Conditional symmetric instability and mesoscale rainbands [J]. Quart. J. Roy. Meteor. Soc., 112: 315-334.
[38]  Xu Q, Clark J H E. 1985. The nature of symmetric instability and its similarity to convective and inertial instability [J]. J. Atmos. Sci., 42: 2880-2883.
[39]  徐文慧,倪允琪,汪小康,等. 2010.登陆台风内中尺度强对流系统演变机制的湿位涡分析 [J].气象学报,68(1): 88-101. Xu Wenhui,Ni Yunqi,Wang Xiaokang,et al. 2010. Moist potential vorticity analysis of the evolution mechanism of a strong mesoscale convective system in a landing typhoon [J]. Acta Meteorologica Sinica (in Chinese),68(1): 88-101.
[40]  张可苏. 1988.斜压气流的中尺度稳定性Ⅰ.对称不稳定 [J].气象学报,46(3): 258-266. Zhang Kesu. 1988. On mesoscale instability of a baroclinic flow. I: Symmetric instability [J]. Acta Meteorologica Sinica (in Chinese),62(2): 243-250.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133