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Volume 5 Issue 2

Apr.  1988

Article Contents

NUMERICAL EXPERIMENTS ON NH SUBTROPICAL UPPER TROPOSPHERIC QUASI-STATIONARY VORTICES IN SUMMER


doi: 10.1007/BF02656782

  • To reveal the possible factors affecting the maintenance and interannual variations of the subtropical planetary-scale vortices such as the south Asian anticyclone and the mid-oceanic troughs, a series of nu-merical experiments are conducted with a quasi -geostrophic low-resolution spectral model. Firstly a simu-lation experiment is performed in which the realistic thermal and topographic forcing are incorporated. The results of simulation show a certain similarity to the actual subtropical flow field in July. On the basis of simulation experiment a series of contrast experiments are performed. It is found that the topog-raphic boundary forcing is less important than the thermal forcing in the dynamics of these systems, and that the anomaly of heating field may cause significant change in position and intensity of the south Asian high and the other systems. It is speculated that the response of the subtropical large-scale systems to heat-ing anomaly is an important cause for the interannual variations of circulation, especially the monsoon circulation.
  • [1] Qian Yongfu, Qian Yun, Wang Qianqian, 1994: Numerical Modellings of Properties of the Summer Quasi-Stationary Circulation Systems and Their Monthly Variations, ADVANCES IN ATMOSPHERIC SCIENCES, 11, 399-407.  doi: 10.1007/BF02658159
    [2] Daeun JEONG, Ki-Hong MIN, Gyuwon LEE, and Kyung-Eak KIM, 2014: A Case Study of Mesoscale Convective Band (MCB) Development and Evolution along a Quasi-stationary Front, ADVANCES IN ATMOSPHERIC SCIENCES, 31, 901-915.  doi: 10.1007/s00376-013-3089-9
    [3] Zhao Li, Zhao Sixiong, 1995: Numerical Experiments of Meiyu(Baiu) Rainfall by Quasi-Lagrangian Limited Area Model with Terrain, ADVANCES IN ATMOSPHERIC SCIENCES, 12, 57-66.  doi: 10.1007/BF02661287
    [4] Zheng Weizhong, Ni Yunqi, 1999: Numerical Experiments for the influence of the Transition Zone Migration on Summer Climate in North China, ADVANCES IN ATMOSPHERIC SCIENCES, 16, 367-377.  doi: 10.1007/s00376-999-0016-1
    [5] LIN Zhongda, LU Riyu, 2005: Interannual Meridional Displacement of the East Asian Upper-tropospheric Jet Stream in Summer, ADVANCES IN ATMOSPHERIC SCIENCES, 22, 199-211.  doi: 10.1007/BF02918509
    [6] D.R. Chakraborty, N.K. Agarwal, 1996: Role of Triad Kinetic Energy Interactions for Maintenance of Upper Tropospheric Low Frequency Waves during Summer Monsoon 1988, ADVANCES IN ATMOSPHERIC SCIENCES, 13, 91-102.  doi: 10.1007/BF02657030
    [7] LU Riyu, YE Hong, Jong-Ghap JHUN, 2011: Weakening of Interannual Variability in the Summer East Asian Upper-tropospheric Westerly Jet since the Mid-1990s, ADVANCES IN ATMOSPHERIC SCIENCES, 28, 1246-1258.  doi: 10.1007/s00376-011-0222-5
    [8] LI Chaofan, LIN Zhongda, 2015: Predictability of the Summer East Asian Upper-Tropospheric Westerly Jet in ENSEMBLES Multi-Model Forecasts, ADVANCES IN ATMOSPHERIC SCIENCES, 32, 1669-1682.  doi: 10.1007/s00376-015-5057-z
    [9] Riyu LU, Saadia HINA, Xiaowei HONG, 2020: Upper- and Lower-tropospheric Circulation Anomalies Associated with Interannual Variation of Pakistan Rainfall during Summer, ADVANCES IN ATMOSPHERIC SCIENCES, 37, 1179-1190.  doi: 10.1007/s00376-020-0137-0
    [10] Si-Ning LING, Ri-Yu LU, Hao Liu, Yali Yang, 2022: Interannual Meridional Displacement of Upper-tropospheric Westerly Jet over the Western East Asia in Summer, ADVANCES IN ATMOSPHERIC SCIENCES.  doi: 10.1007/s00376-022-2279-8
    [11] LIU Huizhi, Sang Jianguo, 2011: Numerical Simulation of Roll Vortices in the Convective Boundary Layer, ADVANCES IN ATMOSPHERIC SCIENCES, 28, 477-482.  doi: 10.1007/s00376-010-9229-6
    [12] Yuhan YAN, Chaofan LI, Riyu LU, 2019: Meridional Displacement of the East Asian Upper-tropospheric Westerly Jet and Its Relationship with the East Asian Summer Rainfall in CMIP5 Simulations, ADVANCES IN ATMOSPHERIC SCIENCES, 36, 1203-1216.  doi: 10.1007/s00376-019-9066-1
    [13] Huang Ronghui, Li Xu, Yuan Chongguang, Lu Riyu, Moon Sung-Euii, Kim Ung-Jun, 1998: Seasonal Prediction Experiments of the Summer Droughts and Floods during the Early 1990’s in East Asia with Numerical Models, ADVANCES IN ATMOSPHERIC SCIENCES, 15, 433-446.  doi: 10.1007/s00376-998-0025-5
    [14] Zhu Zhengxin, Xiao Jie, 1986: NUMERICAL EXPERIMENTS ON DYNAMIC MECHANISM OF BLOCKING, ADVANCES IN ATMOSPHERIC SCIENCES, 3, 105-114.  doi: 10.1007/BF02680049
    [15] Lun LI, Renhe ZHANG, Min WEN, Jianping DUAN, 2018: Modulation of the Intensity of Nascent Tibetan Plateau Vortices by Atmospheric Quasi-Biweekly Oscillation, ADVANCES IN ATMOSPHERIC SCIENCES, 35, 1347-1361.  doi: 10.1007/s00376-018-8057-y
    [16] Huang Ronghui, 1984: THE CHARACTERISTICS OF THE FORCED STATIONARY PLANETARY WAVE PROPAGATIONS IN SUMMER NORTHERN HEMISPHERE, ADVANCES IN ATMOSPHERIC SCIENCES, 1, 84-104.  doi: 10.1007/BF03187619
    [17] ZHANG Meigen, XU Yongfu, Itsushi UNO, Hajime AKIMOTO, 2004: A Numerical Study of Tropospheric Ozone in the Springtime in East Asia, ADVANCES IN ATMOSPHERIC SCIENCES, 21, 163-170.  doi: 10.1007/BF02915702
    [18] HUANG Yi, WANG Meihua, MAO Jietai, 2004: Retrieval of Upper Tropospheric Relative Humidity by the GMS-5 Water Vapor Channel: A Study of the Technique, ADVANCES IN ATMOSPHERIC SCIENCES, 21, 53-60.  doi: 10.1007/BF02915680
    [19] XIN Xiaoge, Zhaoxin LI, YU Rucong, ZHOU Tianjun, 2008: Impacts of Upper Tropospheric Cooling upon the Late Spring Drought in East Asia Simulated by a Regional Climate Model, ADVANCES IN ATMOSPHERIC SCIENCES, 25, 555-562.  doi: 10.1007/s00376-008-0555-x
    [20] Yu-Kun QIAN, Chang-Xia LIANG, Zhuojian YUAN, Shiqiu PENG, Junjie WU, Sihua WANG, 2016: Upper-Tropospheric Environment-Tropical Cyclone Interactions over the Western North Pacific: A Statistical Study, ADVANCES IN ATMOSPHERIC SCIENCES, 33, 614-631.  doi: 10.1007/s00376-015-5148-x

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Manuscript History

Manuscript received: 10 April 1988
Manuscript revised: 10 April 1988
通讯作者: 陈斌, bchen63@163.com
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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NUMERICAL EXPERIMENTS ON NH SUBTROPICAL UPPER TROPOSPHERIC QUASI-STATIONARY VORTICES IN SUMMER

  • 1. Nanjing Institute of Meteorology, Nanjing,Nanjing Institute of Meteorology, Nanjing

Abstract: To reveal the possible factors affecting the maintenance and interannual variations of the subtropical planetary-scale vortices such as the south Asian anticyclone and the mid-oceanic troughs, a series of nu-merical experiments are conducted with a quasi -geostrophic low-resolution spectral model. Firstly a simu-lation experiment is performed in which the realistic thermal and topographic forcing are incorporated. The results of simulation show a certain similarity to the actual subtropical flow field in July. On the basis of simulation experiment a series of contrast experiments are performed. It is found that the topog-raphic boundary forcing is less important than the thermal forcing in the dynamics of these systems, and that the anomaly of heating field may cause significant change in position and intensity of the south Asian high and the other systems. It is speculated that the response of the subtropical large-scale systems to heat-ing anomaly is an important cause for the interannual variations of circulation, especially the monsoon circulation.

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