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Volume 28 Issue 2

Mar.  2011

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2011 >  28(2): 246-256

The Role of Warm North Atlantic SST in the Formation of Positive Height Anomalies over the Ural Mountains during January 2008

  • 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,Nansen-Zhu International Research Centre and Key Laboratory of Regional Climate-Environment Research for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, Key Laboratory of Ocean Circulation and Wave, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071


doi: 10.1007/s00376-010-0069-1

  • The most severe snowstorm and freezing-rain event in the past 50 years hit central and southern China in January 2008. One of the main reasons for the anomalous climate event was the occurrence of atmospheric circulation anomalies over middle and high latitudes, particularly the persistent blocking that occurred over the Ural Mountains. Along with atmospheric anomalies, a strong La Nina event in the Pacific and warm sea surface temperature anomalies (SSTAs) in the North Atlantic were the most significant in the lower boundary. Since a brief analysis suggests that La Nina exerts no significant impact on the Urals, the key point of focus in this study is on the role of the warmer SSTAs in the North Atlantic. Based on an observational composite, North Atlantic SSTAs pattern when the height anomaly over the Urals is strongly positive is found similar to that in January 2008, but no significant SSTAs occurred elsewhere, such as the Pacific. Using an atmospheric general circulation model, ECHAM5, the impact of North Atlantic SSTAs on the extratropical atmosphere circulation in the event was investigated. The results show that the warm SSTAs strengthened the blocking high over the Urals, through anomalous transient eddies. The consistency between the study model and the observational composite indicates that the warm SSTAs in the North Atlantic were indeed an important factor in the formation of the snowstorm disaster of January 2008.
  • [1] Yao YAO, Dehai LUO, 2018: An Asymmetric Spatiotemporal Connection between the Euro-Atlantic Blocking within the NAO Life Cycle and European Climates, ADVANCES IN ATMOSPHERIC SCIENCES, 35, 796-812.  doi: 10.1007/s00376-017-7128-9
    [2] Debashis NATH, CHEN Wen, WANG Lin, and MA Yin, 2014: Planetary Wave Reflection and Its Impact on Tropospheric Cold Weather over Asia during January 2008, ADVANCES IN ATMOSPHERIC SCIENCES, 31, 851-862.  doi: 10.1007/s00376-013-3195-8
    [3] GU Wei, LI Chongyin, WANG Xin, ZHOU Wen, LI Weijing, 2009: Linkage Between Mei-yu Precipitation and North Atlantic SST on the Decadal Timescale, ADVANCES IN ATMOSPHERIC SCIENCES, 26, 101-108.  doi: 10.1007/s00376-009-0101-5
    [4] Dorina CHYI, Zuowei XIE, Ning SHI, Pinwen GUO, Huijun WANG, 2020: Wave-Breaking Features of Blocking over Central Siberia and Its Impacts on the Precipitation Trend over Southeastern Lake Baikal, ADVANCES IN ATMOSPHERIC SCIENCES, 37, 75-89.  doi: 10.1007/s00376-019-9048-3
    [5] Debashis NATH, Wen CHEN, 2016: Impact of Planetary Wave Reflection on Tropospheric Blocking over the Urals-Siberia Region in January 2008, ADVANCES IN ATMOSPHERIC SCIENCES, 33, 309-318.  doi: 10.1007/s00376-015-5052-4
    [6] Mozheng WEI, Jorgen S. FREDERIKSEN, 2005: Finite-Time Normal Mode Disturbances and Error Growth During Southern Hemisphere Blocking, ADVANCES IN ATMOSPHERIC SCIENCES, 22, 69-89.  doi: 10.1007/BF02930871
    [7] Luo Dehai, Li Jianping, Huang Fei, 2002: Life Cycles of Blocking Flows Associated with Synoptic-Scale Eddies: Observed Results and Numerical Experiments, ADVANCES IN ATMOSPHERIC SCIENCES, 19, 594-618.  doi: 10.1007/s00376-002-0003-2
    [8] Shuanglin Li, 2010: A Comparison of Polar Vortex Response to Pacific and Indian Ocean Warming, ADVANCES IN ATMOSPHERIC SCIENCES, 27, 469-482.  doi: 10.1007/s00376-009-9116-1
    [9] Cholaw BUEH, Jingbei PENG, Dawei LIN, Bomin CHEN, 2022: On the Two Successive Supercold Waves Straddling the End of 2020 and the Beginning of 2021, ADVANCES IN ATMOSPHERIC SCIENCES, 39, 591-608.  doi: 10.1007/s00376-021-1107-x
    [10] DIAO Yina, FENG Guolin, LIU Shida, LIU Shikuo, LUO Dehai, HUANG Sixun, LU Weisong, CHOU Jifan, 2004: Review of the Study of Nonlinear Atmospheric Dynamics in China (1999-2002), ADVANCES IN ATMOSPHERIC SCIENCES, 21, 399-406.  doi: 10.1007/BF02915567
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    [12] Luo Dehai, Li Jianping, 2000: Barotropic Interaction between Planetary- and Synoptic-Scale Waves during the Life Cycles of Blockings, ADVANCES IN ATMOSPHERIC SCIENCES, 17, 649-670.  doi: 10.1007/s00376-000-0026-5
    [13] YAO Yao, LUO Dehai, 2015: Do European Blocking Events Precede North Atlantic Oscillation Events?, ADVANCES IN ATMOSPHERIC SCIENCES, 32, 1106-1118.  doi: 10.1007/s00376-015-4209-5
    [14] Fang Zhifang, John M. Wallace, 1993: The Relationship between the Wintertime Blocking over Greenland and the Sea Ice Distribution over North Atlantic, ADVANCES IN ATMOSPHERIC SCIENCES, 10, 453-464.  doi: 10.1007/BF02656970
    [15] LUO Dehai, YAO Yao, 2014: On the Blocking Flow Patterns in the Euro-Atlantic Sector: A Simple Model Study, ADVANCES IN ATMOSPHERIC SCIENCES, 31, 1181-1196.  doi: 10.1007/s00376-014-3197-1
    [16] Dehai LUO, Binhe LUO, Wenqi ZHANG, 2023: A Perspective on the Evolution of Atmospheric Blocking Theories: From Eddy-Mean flow Interaction to Nonlinear Multiscale Interaction, ADVANCES IN ATMOSPHERIC SCIENCES, 40, 553-569.  doi: 10.1007/s00376-022-2194-z
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    • Manuscript History

    Manuscript received: 10 March 2011
    Manuscript revised: 10 March 2011
    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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    The Role of Warm North Atlantic SST in the Formation of Positive Height Anomalies over the Ural Mountains during January 2008

    • 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,Nansen-Zhu International Research Centre and Key Laboratory of Regional Climate-Environment Research for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, Key Laboratory of Ocean Circulation and Wave, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071
    • Manuscript received: 2011-03-10
    • Manuscript revised: 2011-03-10

    Abstract: The most severe snowstorm and freezing-rain event in the past 50 years hit central and southern China in January 2008. One of the main reasons for the anomalous climate event was the occurrence of atmospheric circulation anomalies over middle and high latitudes, particularly the persistent blocking that occurred over the Ural Mountains. Along with atmospheric anomalies, a strong La Nina event in the Pacific and warm sea surface temperature anomalies (SSTAs) in the North Atlantic were the most significant in the lower boundary. Since a brief analysis suggests that La Nina exerts no significant impact on the Urals, the key point of focus in this study is on the role of the warmer SSTAs in the North Atlantic. Based on an observational composite, North Atlantic SSTAs pattern when the height anomaly over the Urals is strongly positive is found similar to that in January 2008, but no significant SSTAs occurred elsewhere, such as the Pacific. Using an atmospheric general circulation model, ECHAM5, the impact of North Atlantic SSTAs on the extratropical atmosphere circulation in the event was investigated. The results show that the warm SSTAs strengthened the blocking high over the Urals, through anomalous transient eddies. The consistency between the study model and the observational composite indicates that the warm SSTAs in the North Atlantic were indeed an important factor in the formation of the snowstorm disaster of January 2008.

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