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Volume 25 Issue 5

Sep.  2008

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2008 >  25(5): 723-736

Response of the Asian Summer Monsoon to Weakening of Atlantic Thermohaline Circulation

  • 1.

    State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029; Center for Monsoon System Research, Institute of Atmospheric Physics, Chines;Walker Institute for Climate System Research, University of Reading, Reading, UK; National Centre for Atmospheric Science-Climate, Reading, UK


doi: 10.1007/s00376-008-0723-z

  • Various paleoclimate records have shown that the Asian monsoon was punctuated by numerous sub-orbital time-scale events, and these events were coeval with those that happened in the North Atlantic. This study investigates the Asian summer monsoon responses to the Atlantic Ocean forcing by applying an additional freshwater flux into the North Atlantic. The simulated results indicate that the cold North Atlantic and warm South Atlantic induced by the weakened Atlantic thermohaline circulation (THC) due to the freshwater flux lead to significantly suppressed Asian summer monsoon. The authors analyzed the detailed processes of the Atlantic Ocean forcing on the Asian summer monsoon, and found that the atmospheric teleconnection in the eastern and central North Pacific and the atmosphere-ocean interaction in the tropical North Pacific play the most crucial role. Enhanced precipitation in the subtropical North Pacific extends the effects of Atlantic Ocean forcing from the eastern Pacific into the western Pacific, and the atmosphere-ocean interaction in the tropical Pacific and Indian Ocean intensifies the circulation and precipitation anomalies in the Pacific and East Asia.
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    [2] Bueh Cholaw, Ji Liren, Sun Shuqing, Cui Maochang, 2001: EAWM-Related Air-Sea-Land Interaction and the Asian Summer Monsoon Circulation, ADVANCES IN ATMOSPHERIC SCIENCES, 18, 659-673.
    [3] Li Chongyin, Mu Mingquan, 2001: The Influence of the Indian Ocean Dipole on Atmospheric Circulation and Climate, ADVANCES IN ATMOSPHERIC SCIENCES, 18, 831-843.
    [4] ZHU Yali, 2012: Variations of the Summer Somali and Australia Cross-Equatorial Flows and the Implications for the Asian Summer Monsoon, ADVANCES IN ATMOSPHERIC SCIENCES, 29, 509-518.  doi: 10.1007/s00376-011-1120-6
    [5] YAN Renchang, BIAN Jianchun, 2015: Tracing the Boundary Layer Sources of Carbon Monoxide in the Asian Summer Monsoon Anticyclone Using WRF-Chem, ADVANCES IN ATMOSPHERIC SCIENCES, 32, 943-951.  doi: 10.1007/s00376-014-4130-3
    [6] ZOU Liwei, ZHOU Tianjun, 2015: Asian Summer Monsoon Onset in Simulations and CMIP5 Projections Using Four Chinese Climate Models, ADVANCES IN ATMOSPHERIC SCIENCES, 32, 794-806.  doi: 10.1007/s00376-014-4053-z
    [7] LIU Xiangwen, WU Tongwen, YANG Song, JIE Weihua, NIE Suping, LI Qiaoping, CHENG Yanjie, LIANG Xiaoyun, 2015: Performance of the Seasonal Forecasting of the Asian Summer Monsoon by BCC_CSM1.1(m), ADVANCES IN ATMOSPHERIC SCIENCES, 32, 1156-1172.  doi: 10.1007/s00376-015-4194-8
    [8] BIAN Jianchun, YAN Renchang, CHEN Hongbin, Lu Daren, Steven T. MASSIE, 2011: Formation of the Summertime Ozone Valley over the Tibetan Plateau: The Asian Summer Monsoon and Air Column Variations, ADVANCES IN ATMOSPHERIC SCIENCES, 28, 1318-1325.  doi: 10.1007/s00376-011-0174-9
    [9] Lu Peisheng, 1995: Evolution of Asian Summer Monsoon and the Slowly Varying Disturbances, ADVANCES IN ATMOSPHERIC SCIENCES, 12, 311-318.  doi: 10.1007/BF02656979
    [10] Yiran GUO, Jie CAO, Hui LI, Jian WANG, Yuchao DING, 2016: Simulation of the Interface between the Indian Summer Monsoon and the East Asian Summer Monsoon: Intercomparison between MPI-ESM and ECHAM5/MPI-OM, ADVANCES IN ATMOSPHERIC SCIENCES, 33, 294-308.  doi: 10.1007/s00376-015-5073-z
    [11] Min WEI, 2005: A Coupled Model Study on the Intensification of the Asian Summer Monsoon in IPCC SRES Scenarios, ADVANCES IN ATMOSPHERIC SCIENCES, 22, 798-806.  doi: 10.1007/BF02918680
    [12] CHEN Bin, XU Xiang-De, YANG Shuai, ZHANG Wei, 2012: On the Temporal and Spatial Structure of Troposphere-to- Stratosphere Transport in the Lowermost Stratosphere over the Asian Monsoon Region during Boreal Summer, ADVANCES IN ATMOSPHERIC SCIENCES, 29, 1305-1317.  doi: 10.1007/s00376-012-1171-3
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    • Manuscript History

    Manuscript received: 10 September 2008
    Manuscript revised: 10 September 2008
    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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    Response of the Asian Summer Monsoon to Weakening of Atlantic Thermohaline Circulation

    • 1. State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029; Center for Monsoon System Research, Institute of Atmospheric Physics, Chines;Walker Institute for Climate System Research, University of Reading, Reading, UK; National Centre for Atmospheric Science-Climate, Reading, UK
    • Manuscript received: 2008-09-10
    • Manuscript revised: 2008-09-10

    Abstract: Various paleoclimate records have shown that the Asian monsoon was punctuated by numerous sub-orbital time-scale events, and these events were coeval with those that happened in the North Atlantic. This study investigates the Asian summer monsoon responses to the Atlantic Ocean forcing by applying an additional freshwater flux into the North Atlantic. The simulated results indicate that the cold North Atlantic and warm South Atlantic induced by the weakened Atlantic thermohaline circulation (THC) due to the freshwater flux lead to significantly suppressed Asian summer monsoon. The authors analyzed the detailed processes of the Atlantic Ocean forcing on the Asian summer monsoon, and found that the atmospheric teleconnection in the eastern and central North Pacific and the atmosphere-ocean interaction in the tropical North Pacific play the most crucial role. Enhanced precipitation in the subtropical North Pacific extends the effects of Atlantic Ocean forcing from the eastern Pacific into the western Pacific, and the atmosphere-ocean interaction in the tropical Pacific and Indian Ocean intensifies the circulation and precipitation anomalies in the Pacific and East Asia.

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