Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Chinese Journal of Atmospheric Sciences》 2015-01
Add to Favorite Get Latest Update

A Thermodynamic Mechanism Analysis on Enhancement or Dissipation of Convective Systems from the Mountains under Weak Synoptic Forcing

XIAO Xian;CHEN Mingxuan;GAO Feng;WANG Yingchun;Institute of Urban Meteorology,China Meteorology Adminstration;Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Science;University of Chinese Academy of Sciences;Beijing Meteorological Bureau;  
A preliminary analysis of thermodynamic mechanisms of two well-defined convective systems over Beijing area and its vicinity was studied with a three-dimensional cloud-scale numerical model and a rapid-update cycling 4DVar assimilation technique using data from four of China's new-generation weather radar stations(CINRADs). The two convective systems were both under weak synoptic forcing and precipitation stratification in the low-middle layer. The cooperation of the cold pool and wind field act as trigger and strengthening mechanisms for the storm, which could propagate from the mountains to the plains. Originally, the cold pool was generated due to the uneven distribution of the thermodynamic field, and blocks wind propagated at the southern edge of the cold pool. The mechanism resulted in relatively high convergence, relatively vertical wind shear and helicity. In the first case, which occurred on June 26, 2009, a relatively strong cool pool located to the south, cut off the warm southeastern inflow that caused distinct divergence from the plains to the mountains, causing storms to continually weaken on the mountains. However, outflow from the dissipating storms moved over southeast winds, resulting in high shear and helicity, and therefore new storms formed at the edge of the original cool pool. Due to low shear over the plains, the cool pool extended more quickly than the storms, causing the storms to dissipate. For the second case on August 1, 2009, the cold pool was located to the north. Veering winds that were forced and blocked by the cool pool and mountains formed distinct and strong convergences via. When storms reached the foothills, the original long-term cool pool still provided relatively high convergence, shear and helicity for the storm spreading from the mountains to the plains. New and original cool pools squeezed each other, resulting in an intensified northern storm. Storms drifted toward each other, eventually leading to linearly organized echoes. As linear echoes spread over the plains, the perturbation temperature shows the cold pool further intensified and expanded. Gust fronts intensified, tilted forward, and moved away from the storm. Thermodynamics of the linear echoes showed some characteristics of a squall line. However, the weak wind shear in the path of storm propagation resulted in disequilibrium with the cold pool. The gust front blew out the convergence line away from the original storm, which became weaker. These data, combined other investigations, imply that simulated helicity and shear are useful to indicate development of the storms. Finally, a conceptual model was developed using observed data and simulation results, showing low-level dynamic and thermodynamic collocation significantly affects development and evolution of these storms from the mountains to the plains.
【Fund】: 公益性行业(气象)科研专项项目GYHY201306008;; 国家自然科学基金项目41305041
【CateGory Index】: P445
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
Chinese Journal Full-text Database 10 Hits
1 Xiao Hui, Wang Xiaobo, Zhou Feifei, Hong Yanchao, and Huang Meiyuan(Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029);A Three-Dimensional Numerical Simulation on Microphysical Processes of Torrential Rainstorms[J];Chinese Journal of Atmospheric Sciences;2004-03
2 SUN Ji-Song~(1,2),WANG Hua~1,WANG Ling~1,LIANG Feng~1,KANG Yu-Xia~(1),and JIANG Xiao-Yan~(3)1 Beijing Meteorological Observatory,Beijing 1000892 State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081 3 Beijing Urban Meteorological Institute,China Meteorological Administration,Beijing 100089;The Role of Urban Boundary Layer in Local Convective Torrential Rain Happening in Beijing on 10 July 2004[J];Chinese Journal of Atmospheric Sciences;2006-02
3 SUN Jisong1,2 and YANG Bo11 Beijing Regional Meteorological Center,Beijing 1000892 Beijing Urban Meteorological Institute,China Meteorological Administration,Beijing 100089;Meso-β Scale Torrential Rain Affected by Topography and the Urban Circulation[J];Chinese Journal of Atmospheric Sciences;2008-06
4 YU Xiao-ding,WANG Ying-chun,CHEN Ming-xuan,TAN Xiao-guang (Institute of Urban Meteorology, China Meteorological Adminisration, Beijing 100081, China);Severe Convective Weather Warnings and Its Improvement with the Introduction of the NEXRAD[J];Plateau Meteorology;2005-03
5 CHEN Mingxuan1,WANG Yingchun2,XIAO Xian1,and GAO Feng1 1 Institute of Urban Meteorology,China Meteorological Administration,Beijing 100089 2 Beijing Meteorological Service,Beijing 100089;A Case Simulation Analysis on Thermodynamical Mechanism of Supercell Storm Development Using 3-D Cloud Model and 4-D Variational Assimilation on Radar Data[J];Chinese Journal of Atmospheric Sciences;2012-05
6 SUN Jisong 1, 2 , HE Na 2 , GUO Rui 2 , and CHEN Mingxuan 1 1 Institute of Urban Meteorology, China Meteorological Administration, Beijing 100089 2 Beijing Meteorological Observatory, Beijing 100089;The Configuration Change and Train Effect Mechanism of Multi-Cell Storms[J];Chinese Journal of Atmospheric Sciences;2013-01
7 CHEN Mingxuan~1 WANG Yingchun~2 GAO Feng~1 WANG Tingling~(1,3) 1.Institute of Urban Meteorology,CMA,Beijing 100089,China 2.Beijing Meteorological Bureau,Beijing 100089,China 3.Chinese Academy of Meteorological Sciences,Beijing 100081,China;A low-level thermo-dynamical retrieval system based on the radar data 4DVar and a preliminary analysis of its applications in support of the Beijing 2008 Olympics[J];Acta Meteorologica Sinica;2011-01
8 CHEN Min FAN Shuiyong ZHENG Zuofang ZHONG Jiqin Institute of Urban Meteorology,CMA,Beijing 100089,China;The performance of the proximity sounding based on the BJ-RUC system and its preliminary implementation in the convective potential forecast[J];Acta Meteorologica Sinica;2011-01
9 Jiao Meiyan Bi Baogui (National Meteorological Center, Beijing 100081);Mesoscale Structure Analysis of Topography-induced Heavy Rainfall in Beijing in Summer[J];Meteorological Monthly;2005-06
10 Wang Yubin1 Zhou Haiguang2 Yu Dongchang1 Zhou Yong3 Su Debin1 Liang Feng1(1.Beijing Meteorological Bureau,100089;2.State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences;3.National Meteorological Information Center);Real Time Data Processing Technique on Very Short-Range and Nowcasting for Beijing 2008 Olympic Games[J];Meteorological Monthly;2008-07
Chinese Journal Full-text Database 10 Hits
1 LIU Xiao-di et al (Nanjing University of Information Science and Technology,Nanjing,Jiangsu 210044);Dynamia Analysis of Rainstorm of Typhoon "KAEMI" by Means of Doppler Radar[J];Journal of Anhui Agricultural Sciences;2008-13
2 ZHANG Zhong-bo et al (Hunan Weather Modification Office,Changsha,Hunan 410007);Analysis of Water Vapor Characteristic and Precipitation Potentiality over Dongjiang Reservoir in Hunan[J];Journal of Anhui Agricultural Sciences;2008-26
3 DENG Zhuo et al (Liaoning Provincial Meteorological Bureau of Chaoyang City,Chaoyang,Liaoning 122000);Characteristics and Forecast Method of Hail Weather in Chaoyang District[J];Journal of Anhui Agricultural Sciences;2008-29
4 BAN Xian-xiu et al(Artificial Effect Weather Office of Liaoning Province,Shenyang,Liaoning 110016);Analysis on Relationships of Radar Reflectivity and Rain Rate Based on the Raindrop Spectra[J];Journal of Anhui Agricultural Sciences;2008-33
5 LI Run-chun et al(Yangquan Meteorological Bureau of Shanxi Province,Yangquan,Shanxi 045000);Analysis of Twice Weather Processes of Disaster-causing Hail in Yangquan City in July of 2006[J];Journal of Anhui Agricultural Sciences;2008-36
6 MU Feng-jun et al (School of Remote Sensing,Nanjing University of Information Science & Technology,Nanjing,Jiangsu 210044);Comparison of Atmospheric Precipitation between GPS/MET and Meteorological Satellite[J];Journal of Anhui Agricultural Sciences;2009-01
7 LIU Ruo-bing et al(Department of Remote Sensing,Nanjing University of Information Science & Technology,Nanjing,Jiangsu 210044);Analysis of A Strong Thunderstorm Process in Nanjing Region of Jiangsu Province[J];Journal of Anhui Agricultural Sciences;2009-02
8 LUO Xiao-song et al(Meteorological Bureau of Zunyi City,Zunyi,Guizhou 563002);Study on Z-I Relationship of Rainstorm in Zunyi Region of Guizhou Province[J];Journal of Anhui Agricultural Sciences;2009-16
9 XU Shu et al (Key Laboratory of Meteorological Disaster of Ministry of Education,Nanjing University of Information Science & Technology,Nanjing,Jiangsu 210044);Study on the Doppler Radar Echo during A Fog process in Nanjing Area[J];Journal of Anhui Agricultural Sciences;2009-30
10 FANG Bin et al(Liaoning Weather Modification Office,Shenyang,Liaoning 110016);Operational System of Liaoning Artificial Precipitation Experimental Areal Rainfall Estimated by Radar and Rain-gauge and Parsivel[J];Journal of Anhui Agricultural Sciences;2009-31
【Secondary Citations】
Chinese Journal Full-text Database 10 Hits
2 Suen Shu-qing Zhai Gao-qing(Institute of Atmospheric Physics, Academia Sinica)(Department of Geography, Hangzhou University);ON THE INSTABILITY OF THE LOW LEVEL JET AND ITS TRIGGER FUNCTION FOR THE OCCURRENCE OF HEAVY RAIN-STORMS[J];Chinese Journal of Atmospheric Sciences;1980-04
3 Hong Yanchao Huang Meiyuan Wang Shouping (Institute of Atmospheric Physics, Academia Sinica);A THEORETICAL STUDY ON INHOMOGENEITY OF BRIGHT BAND IN MEI-YU FRONTAL CLOUD SYSTEM[J];Chinese Journal of Atmospheric Sciences;1984-02
4 Cheng Linsheng and Feng Wuhu (Department of Atmospheric Science, Lanzhou University, Lanzhou 730000);Analyses and Numerical Simulation on an Abrupt Heavy Rainfall and Structure of a Mesoscale Vortex during July 1998[J];Chinese Journal of Atmospheric Sciences;2001-04
5 Bei Naifang and Zhao Sixiong(Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029);Mesoscale Analysis of Severe Local Heavy Rainfall during the Second Stage of the 1998 Meiyu Season[J];Chinese Journal of Atmospheric Sciences;2002-04
6 Lei Hengchi, Wang Hong, Hu Zhaoxia, Xiao Hui and Huang Meiyuan(Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029);A Numerical Research on Rain Storm Kinetic Process of the Wuhan Area on July 21,1998[J];Chinese Journal of Atmospheric Sciences;2002-05
7 Gao Shouting, Zhao Sixiong, Zhou Xiaoping, Sun Shuqing, and Tao Shiyan (Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 );Progress of Research on Sub-synoptic Scale and Mesoscale Torrential Rain Systems[J];Chinese Journal of Atmospheric Sciences;2003-04
8 Zhang Xiaoling Tao Shiyan Zhang Shunli(Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029);Three Types of Heavy Rainstorms Associated with the Meiyu Front[J];Chinese Journal of Atmospheric Sciences;2004-02
9 Long Xiao, and Cheng Linsheng(Department of Atmospheric Science, Lanzhou University, Lanzhou 73000);Numerical Simulation and Analysis for “99·6” Meiyu Front Rainstorm and the Low Vortex with Shear Line[J];Chinese Journal of Atmospheric Sciences;2004-03
10 Liu Shuyan 1,2) , Xiao Hui 2) , Du Bingyu 1) , He Yuxiang 2) , and Zhang Ronglin 3) 1) (Nanjing Institute of Meteorology, Nanjing 210044) 2) (Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029) 3) (Chinese Academy of Meteorological Sciences, Beijing 100081);Three-Dimensional Numerical Simulation of a Strong Convective Storm in Beijing[J];Chinese Journal of Atmospheric Sciences;2004-03
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved