台风变性过程中下游环流发展的个例对比研究

  • 陈华 ,
  • 霍也
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  • 1.南京信息工程大学大气科学学院,江苏 南京 210044
    2.长春市气象局,吉林 长春 130051

作者简介:陈华(1971-),男,湖北建始人,副教授,主要从事中尺度大气动力学研究.E-mail:huach@nuist.edu.cn

收稿日期: 2015-12-30

  修回日期: 2016-03-10

  网络出版日期: 2016-04-10

基金资助

国家自然科学基金项目“台风的变性过程对中纬度急流的作用及其下游影响”(编号:41175061)资助

版权

, 2016,

Case Comparing Study of Downstream Circulation Development during Typhoon Extratropical Transition

  • Hua Chen ,
  • Ye Huo
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  • 1.College of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing 210044, China
    2.Changchun Meteorological Bureau, Changchun 130051, China

First author:Chen Hua(1971-), male, Jianshi County,Hubei Province, Associate Professor. Research areas include mesoscale atmospheric dynamics.E-mail:huach@nuist.edu.cn

Received date: 2015-12-30

  Revised date: 2016-03-10

  Online published: 2016-04-10

Supported by

Project supported by the National Natural Science Foundation of China “The effects of transforming typhoons on midlatitude jet and its downstream inpacts”(No.41175061)

Copyright

地球科学进展 编辑部, 2016,

摘要

台风在温带变性过程(Extratropical Transition,ET)中与中纬度系统的相互作用会引起下游环流的发展,选取3个台风个例,通过分析涡动动能收支和理想化模拟实验对其下游发展机制进行研究。3个台风的变性过程所引起的下游发展都具有共同的机制,即首先在上层下游有脊和槽先后发展,随后激发低层涡旋生成,并与之耦合,形成一个贯穿整个对流层的深厚气旋系统。促使下游脊生成和发展的非地转位势通量源于台风,高层系统向下输送的垂直非地转位势通量在低层辐合,使得涡旋在低层发展。模拟实验表明,台风出流向中纬度急流区域输送低位涡(Potential Vorticity,PV)空气,使得其PV梯度增大和斜压性增强,从而激发了Rossby波在急流中生成并沿之向下游传播,而下游槽脊对引起更下游波型的发展也是通过Rossby波的频散而达成。

本文引用格式

陈华 , 霍也 . 台风变性过程中下游环流发展的个例对比研究[J]. 地球科学进展, 2016 , 31(4) : 409 -421 . DOI: 10.11867/j.issn.1001-8166.2016.04.0409.

Abstract

The interaction between extratropical transition process and the mid-latitude jet system stimulates the downstream development. In this paper, three typhoon cases were selected to study their downstream development mechanism through the analysis of the eddy kinetic energy budget and the idealized simulations. The results of Chen’s work to the Pacific region were examined. The results were consistent with the results of Chen’s Atlantic hurricane Case. ET downstream at the upper levels generated first eddies, and the disturbances triggered the low level eddy development. Then the upper and the lower coupled and formed a deep cyclone system throughout the whole troposphere. The ageostrophic geopotential flux promoted the formation and development of the downstream ridge from the typhoon. Vertical ageostrophic geopotential flux transferred energy from upper downward that convergence happened in lower, which stimulated the lower-level cyclone development. Simulation results showed that, in the process of ET, TC outflow transported low potential vorticity to mid-latitude jet, which enhanced the PV gradient and the baroclinic. Then, it is inspired the Rossby wave in the jet and propagated downstream. The formation of downstream ridge-trough couple and development of the further wave was the spread to the downstream through the Rossby wave.

参考文献

[1] Pielke C W.Landsea normalized Hurricane damages in the United Sates: 1925-1995[J]. Weather and Forecasting,1998, 13(3): 621-631.
[2] Bishop C H, Thorpe A J.Potential vorticity and the electrostatics analogy: Quasi-geostrophic theory[J].Quarterly Journal of the Royal Meteorological Society,1994, 120(3): 713-731.
[3] Simmons A J, Hoskins B J.The downstream and upstream development of unstable baroclinic waves[J].Journal of the Atmospheric Sciences,1979, 36(7): 1 239-1 254.
[4] Atallah E H, Bosart L F.The extratropical transition and precipitation distribution of hurricane Floyd (1999)[J].Monthly Weather Review,2003, 131(6): 1 063-1 081.
[5] Chen H, Pan W Y.Targeting studies for the extratropical transition of Hurricane Fabian: Signal propagation, the interaction between Fabian and Midlatitude flow, and an observation strategy[J].Monthly Weather Review,2010, 138(8): 3 224-3 242.
[6] Hoskins B, Berrisford P.A potential vorticity perspective of the storm of 15-16 October 1987[J].Weather,1988, 43(3): 122-129.
[7] Riemer M, Jones S C.The impact of extratropical transition on the downstream flow: An idealized modelling study with a straight jet[J].Quarterly Journal of the Royal Meteorological Society,2008, 134(1): 69-91.
[8] Riemer M, Jones S C.The downstream impact of tropical cyclones on a developing baroclinic wave in idealized scenarios of extratropical transition[J].Quarterly Journal of the Royal Meteorological Society,2010, 136(2): 617-637.
[9] Langland R H,Toth Z, Gelaro R, et al.The North Pacific Experiment (NORPEX-98): Targeted observations for improved North American weather forecasts[J].Bulletin of the American Meteorological Society,1999, 80(7): 1 363-1 384.
[10] Szunyogh I,Toth Z, Morss R E, et al.The effect of targeted dropsonde observations during the 1999 winter storm reconnaissance program[J].Monthly Weather Review,2000, 128(10): 3 520-3 537.
[11] Mu M, Jiang Z.A method to find perturbations that trigger blocking onset: Conditional nonlinear optimal perturbations[J].Journal of the Atmospheric Sciences,2008, 65(12): 3 935-3 946.
[12] Morss R E, Emanuel K A.Influence of added observations on analysis and forecast errors: Results from idealized systems[J].Quarterly Journal of the Royal Meteorological Society,2002, 128(1): 285-321.
[13] Chen H.Downstream development of baroclinic waves in the Midlatitude Jet induced by extratropical transition: A case study[J].Advances in Atmospheric Sciences,2015, 32(4): 528-540.
[14] Orlanski I, Katzfey J.The life cycle of a cyclone wave in the Southern Hemisphere. Part I: Eddy energy budget[J].Journal of the Atmospheric Sciences,1991, 48(9): 1 972-1 998.
[15] Orlanski I, Chang E K M. Ageostrophic geopotential fluxs in downstream and upstream development of baroclinic waves[J].Journal of the Atmospheric Sciences,1993, 50(1): 212-225.
[16] Kurihara Y, Bender M A, Ross R J.An initialization scheme of hurricane models by votex specification[J].Monthly Weather Review,1993, 121(7): 2 030-2 045.
[17] Wang Guomin, Wang Shiwen, Li Jianjun.A bogus typhoon scheme and its application to a movable nested mesh model[J].Journal of Tropical Meteorology,1996, 12(1): 9-17.
[17] [王国民, 王诗文, 李建军.一个人造台风方案及其在移动套网格模式中的应用[J]. 热带气象学报, 1996, 12(1): 9-17.]
[18] Lei Xiaotu.Progress of unmanned aerial vehicles and their application to detection of tropical cyclone[J].Advances in Earth Science,2015, 30(2):276-283.
[18] [雷小途. 无人飞机在台风探测中的应用进展[J]. 地球科学进展, 2015, 30(2):276-283.]
[19] Duan Yihong.Monitoring and forecasting of finescale structure and impact assessment of landfalling typhoons[J].Advances in Earth Science, 2015, 30(8):847-854.
[19] [端义宏. 登陆台风精细结构的观测、预报与影响评估[J]. 地球科学进展, 2015, 30(8):847-854.]
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