• Adv. Atmos. Sci.  2019, Vol. 36 Issue (1): 55-64    DOI: 10.1007/s00376-018-8072-z
    Variation in Principal Modes of Midsummer Precipitation over Northeast China and Its Associated Atmospheric Circulation
    Tingting HAN1, 2, *(), Shengping HE1, 3, Huijun WANG1, 2, 4, Xin HAO1, 2
    1Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University for Information Science and Technology, Nanjing 210044, China
    2Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
    3Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen 5007, Norway
    4Climate Change Research Center, Chinese Academy of Sciences, Beijing 100049, China
    Abstract
    Abstract  

    This study documents the first two principal modes of interannual variability of midsummer precipitation over Northeast China (NEC) and their associated atmospheric circulation anomalies. It is shown that the first principal mode exhibits the largest amount of variability in precipitation over the south of NEC (referred to as the south mode), whereas the second principal mode behaves with the greatest precipitation anomaly over the north of NEC (referred to as the north mode). Further findings reveal that, through modulating moisture transportation and upper- and lower-troposphere divergence circulation as well as vertical movement over NEC, the anomalous northwestern Pacific anticyclone and the anticyclone centered over northern NEC exert the dominant influence on the south and north modes, respectively. Additionally, it is quantitatively estimated that water vapor across the southern boundary of NEC dominates the moisture budget for the south mode, while the north mode has a close connection with moisture through NEC's northern and western boundaries. Furthermore, the north (south) mode is strongly related to the intensity (meridional shift) of the East Asian westerly jet.

    Corresponding Authors: Tingting HAN   
    Just Accepted Date: 27 August 2018   Issue Date: 01 November 2018
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    Tingting HAN
    Shengping HE
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    Xin HAO
    Cite this article:   
    Tingting HAN,Shengping HE,Huijun WANG, et al. Variation in Principal Modes of Midsummer Precipitation over Northeast China and Its Associated Atmospheric Circulation[J]. Adv. Atmos. Sci., 2019, 36(1): 55 -64 .
    URL:  
    http://159.226.119.58/aas/EN/10.1007/s00376-018-8072-z     OR     
    http://159.226.119.58/aas/EN/Y2019/V36/I1/55
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