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Volume 29 Issue 4

Jul.  2012

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2012 >  29(4): 755-768

Contrasts of Atmospheric Circulation and Associated Tropical Convection between Huaihe River Valley and Yangtze River Valley Mei-yu Flooding

  • 1.

    State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing} 100029, Graduate University of Chinese Academy of Sciences, Beijing 100049;State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029


doi: 10.1007/s00376-012-1217-6

  • The significant differences of atmospheric circulation between flooding in the Huaihe and Yangtze River valleys during early mei-yu (i.e., the East Asian rainy season in June) and the related tropical convection were investigated. During the both flooding cases, although the geopotential height anomalies always exhibit equivalent barotropic structures in middle to high latitudes at middle and upper troposphere, the phase of the Rossby wave train is different over Eurasian continent. During flooding in the Huaihe River valley, only one single blocking anticyclone is located over Baikal Lake. In contrast, during flooding in the Yangtze River valley, there are two blocking anticyclones. One is over the Ural Mountains and the other is over Northeast Asia. In the lower troposphere a positive geopotential height anomaly is located at the western ridge of subtropical anticyclone over Western Pacific (SAWP) in both flooding cases, but the location of the height anomaly is much farther north and west during the Huaihe River mei-yu flooding. Furthermore, abnormal rainfall in the Huaihe River valley and the regions north of it in China is closely linked with the latent heating anomaly over the Arabian Sea and Indian peninsula. However, the rainfall in the Yangtze River valley and the regions to its south in China is strongly related to the convection over the western tropical Pacific. Numerical experiments demonstrated that the enhanced latent heating over the Arabian Sea and Indian peninsula causes water vapor convergence in the region south of Tibetan Plateau and in the Huaihe River valley extending to Japan Sea with enhanced precipitation; and vapor divergence over the Yangtze River valley and the regions to its south with deficient precipitation. While the weakened convection in the tropical West Pacific results in moisture converging over the Yangtze River and the region to its south, along with abundant rainfall.
  • [1] Xiaying ZHU, Mingzhu YANG, Ge LIU, Yanju LIU, Weijing LI, Sulan NAN, Linhai SUN, 2023: A Precursory Signal of June–July Precipitation over the Yangtze River Basin: December–January Tropospheric Temperature over the Tibetan Plateau, ADVANCES IN ATMOSPHERIC SCIENCES, 40, 1986-1997.  doi: 10.1007/s00376-022-2079-1
    [2] Yali LUO, Weimiao QIAN, Yu GONG, Hongyan WANG, Da-Lin ZHANG, 2016: Ground-Based Radar Reflectivity Mosaic of Mei-yu Precipitation Systems over the Yangtze River-Huaihe River Basins, ADVANCES IN ATMOSPHERIC SCIENCES, 33, 1285-1296.  doi: 10.1007/s00376-016-6022-1
    [3] Yu LI, Keyi CHEN, Zhipeng XIAN, 2021: Evaluation of All-Sky Assimilation of FY-3C/MWHS-2 on Mei-yu Precipitation Forecasts over the Yangtze-Huaihe River Basin, ADVANCES IN ATMOSPHERIC SCIENCES, 38, 1397-1414.  doi: 10.1007/s00376-021-0401-y
    [4] Lixia ZHANG, Dan ZHAO, Tianjun ZHOU, Dongdong PENG, Chan XIAO, 2021: Moisture Origins and Transport Processes for the 2020 Yangtze River Valley Record-Breaking Mei-yu Rainfall, ADVANCES IN ATMOSPHERIC SCIENCES, 38, 2125-2136.  doi: 10.1007/s00376-021-1097-8
    [5] Chunguang CUI, Wen ZHOU, Hao YANG, Xiaokang WANG, Yi DENG, Xiaofang WANG, Guirong XU, Jingyu WANG, 2023: Analysis of the Characteristics of the Low-level Jets in the Middle Reaches of the Yangtze River during the Mei-yu Season, ADVANCES IN ATMOSPHERIC SCIENCES, 40, 711-724.  doi: 10.1007/s00376-022-2107-1
    [6] WANG Xin, WANG Dongxiao, ZHOU Wen, LI Chongyin, 2012: Interdecadal Modulation of the Influence of La Nina Events on Mei-yu Rainfall over the Yangtze River Valley, ADVANCES IN ATMOSPHERIC SCIENCES, 29, 157-168.  doi: 10.1007/s00376-011-1021-8
    [7] Sun Bomin, Sun Shuqing, 1994: The Analysis on the Features of the Atmospheric Circulation in Preceding Winters for the Summer Drought and Flooding in the Yangtze and Huaihe River Valley, ADVANCES IN ATMOSPHERIC SCIENCES, 11, 79-90.  doi: 10.1007/BF02656997
    [8] Zhixuan WANG, Jilin SUN, Jiancheng WU, Fangyue NING, Weiqi CHEN, 2020: Attribution of Persistent Precipitation in the Yangtze–Huaihe River Basin during February 2019, ADVANCES IN ATMOSPHERIC SCIENCES, 37, 1389-1404.  doi: 10.1007/s00376-020-0107-6
    [9] XUAN Shouli, ZHANG Qingyun, SUN Shuqing, 2011: Anomalous Midsummer Rainfall in Yangtze River-Huaihe River Valleys and Its Association with the East Asia Westerly Jet, ADVANCES IN ATMOSPHERIC SCIENCES, 28, 387-397.  doi: 10.1007/s00376-010-0111
    [10] ZHAO Bingke, WU Guoxiong, YAO Xiuping, 2007: Potential Vorticity Structure and Inversion of the Cyclogenesis Over the Yangtze River and Huaihe River Valleys, ADVANCES IN ATMOSPHERIC SCIENCES, 24, 44-54.  doi: 10.1007/s00376-007-0044-7
    [11] Yuanchun ZHANG, Jianhua SUN, Shenming FU, 2017: Main Energy Paths and Energy Cascade Processes of the Two Types of Persistent Heavy Rainfall Events over the Yangtze River-Huaihe River Basin, ADVANCES IN ATMOSPHERIC SCIENCES, 34, 129-143.  doi: 10.1007/s00376-016-6117-8
    [12] BAO Ming, 2008: Relationship Between Persistent Heavy Rain Events in the Huaihe River Valley and the Distribution Pattern of Convective Activities in the Tropical Western Pacific Warm Pool, ADVANCES IN ATMOSPHERIC SCIENCES, 25, 329-338.  doi: 10.1007/s00376-008-0329-5
    [13] Huijie WANG, Jianhua SUN, Shenming FU, Yuanchun ZHANG, 2021: Typical Circulation Patterns and Associated Mechanisms for Persistent Heavy Rainfall Events over Yangtze–Huaihe River Valley during 1981–2020, ADVANCES IN ATMOSPHERIC SCIENCES, 38, 2167-2182.  doi: 10.1007/s00376-021-1194-8
    [14] Wu Renguang, Chen Lieting, 1998: Decadal Variation of Summer Rainfall in the Yangtze-Huaihe River Valley and Its Relationship to Atmospheric Circulation Anomalies over East Asia and Western North Pacific, ADVANCES IN ATMOSPHERIC SCIENCES, 15, 510-522.  doi: 10.1007/s00376-998-0028-2
    [15] Xinyu LI, Riyu LU, 2018: Subseasonal Change in the Seesaw Pattern of Precipitation between the Yangtze River Basin and the Tropical Western North Pacific during Summer, ADVANCES IN ATMOSPHERIC SCIENCES, 35, 1231-1242.  doi: 10.1007/s00376-018-7304-6
    [16] Shaolei TANG, Jing-Jia LUO, Jiaying HE, Jiye WU, Yu ZHOU, Wushan YING, 2021: Toward Understanding the Extreme Floods over Yangtze River Valley in June−July 2020: Role of Tropical Oceans, ADVANCES IN ATMOSPHERIC SCIENCES, 38, 2023-2039.  doi: 10.1007/s00376-021-1036-8
    [17] WANG Zhifu, QIAN Yongfu, 2009: The Relationship of Land-Ocean Thermal Anomaly Difference with Mei-yu and South China Sea Summer Monsoon, ADVANCES IN ATMOSPHERIC SCIENCES, 26, 169-179.  doi: 10.1007/s00376-009-0169-y
    [18] JIAN Maoqiu, QIAO Yunting, YUAN Zhuojian, LUO Huibang, 2006: The Impact of Atmospheric Heat Sources over the Eastern Tibetan Plateau and the Tropical Western Pacific on the Summer Rainfall over the Yangtze-River Basin, ADVANCES IN ATMOSPHERIC SCIENCES, 23, 149-155.  doi: 10.1007/s00376-006-0015-4
    [19] Huiyan XU, Xiaofan LI, Jinfang YIN, Dengrong ZHANG, 2023: Predecessor Rain Events in the Yangtze River Delta Region Associated with South China Sea and Northwest Pacific Ocean (SCS-WNPO) Tropical Cyclones, ADVANCES IN ATMOSPHERIC SCIENCES, 40, 1021-1042.  doi: 10.1007/s00376-022-2069-3
    [20] Yuanchun ZHANG, Jianhua SUN, Ruyi YANG, Ruoyun MA, 2022: Initiation and Evolution of Long-Lived Eastward-Propagating Mesoscale Convective Systems over the Second-Step Terrain along Yangtze-Huaihe River Valley, ADVANCES IN ATMOSPHERIC SCIENCES, 39, 763-781.  doi: 10.1007/s00376-022-1303-3
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    • Manuscript History

    Manuscript received: 10 July 2012
    Manuscript revised: 10 July 2012
    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

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    Contrasts of Atmospheric Circulation and Associated Tropical Convection between Huaihe River Valley and Yangtze River Valley Mei-yu Flooding

    • 1. State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing} 100029, Graduate University of Chinese Academy of Sciences, Beijing 100049;State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029
    • Manuscript received: 2012-07-10
    • Manuscript revised: 2012-07-10

    Abstract: The significant differences of atmospheric circulation between flooding in the Huaihe and Yangtze River valleys during early mei-yu (i.e., the East Asian rainy season in June) and the related tropical convection were investigated. During the both flooding cases, although the geopotential height anomalies always exhibit equivalent barotropic structures in middle to high latitudes at middle and upper troposphere, the phase of the Rossby wave train is different over Eurasian continent. During flooding in the Huaihe River valley, only one single blocking anticyclone is located over Baikal Lake. In contrast, during flooding in the Yangtze River valley, there are two blocking anticyclones. One is over the Ural Mountains and the other is over Northeast Asia. In the lower troposphere a positive geopotential height anomaly is located at the western ridge of subtropical anticyclone over Western Pacific (SAWP) in both flooding cases, but the location of the height anomaly is much farther north and west during the Huaihe River mei-yu flooding. Furthermore, abnormal rainfall in the Huaihe River valley and the regions north of it in China is closely linked with the latent heating anomaly over the Arabian Sea and Indian peninsula. However, the rainfall in the Yangtze River valley and the regions to its south in China is strongly related to the convection over the western tropical Pacific. Numerical experiments demonstrated that the enhanced latent heating over the Arabian Sea and Indian peninsula causes water vapor convergence in the region south of Tibetan Plateau and in the Huaihe River valley extending to Japan Sea with enhanced precipitation; and vapor divergence over the Yangtze River valley and the regions to its south with deficient precipitation. While the weakened convection in the tropical West Pacific results in moisture converging over the Yangtze River and the region to its south, along with abundant rainfall.

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