Role of Atlantic Multidecadal Oscillation (AMO) in winter intraseasonal variability over Ural

被引:3
作者
Li Shuanglin [1 ,2 ,3 ]
Li Ding [1 ,2 ]
Chen Ying [4 ]
机构
[1] Chinese Acad Sci, Inst Atmospher Phys, Beijing, Peoples R China
[2] Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
[3] JCGCS, Beijing, Peoples R China
[4] Shanxi Prov Meteorol Adm, Shanxi Climate Ctr, Taiyuan, Shanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Atlantic Multidecadal Oscillation; modulation; intraseasonal variability; atmospheric stationary wave;
D O I
10.1080/16742834.2018.1526035
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
The modulation of winter intraseasonal variability (ISV) by the Atlantic Multidecadal Oscillation (AMO) is investigated through three sets of reanalysis data and numerical experiments with the NCEP's atmospheric general circulation model (AGCM). Results show that the positive phase of the AMO tends to intensify ISV activity over the northern Atlantic and shift ISV activity over the Ural Mountains toward the south, causing weakened ISV activity at 200 hPa in the north to the Urals and intensified activity in the south. The modulation of ISV activity by the AMO over the Urals is then explored through comparison of the composite evolution of anomalous ISV cases for the different AMO phases. Fewer ISV cases are found in the AMO positive phase than the negative phase, but no substantial difference in the temporal evolution of anomalous ISV events between the two opposing phases of the AMO. Thus, the AMO exerts its modulation through influencing the occurrence frequency of ISV events, rather than their development or evolution processes. A similar result is seen in the AGCM sensitivity experiments.
引用
收藏
页码:445 / 453
页数:9
相关论文
共 43 条
  • [1] ANDERSON JR, 1983, J ATMOS SCI, V40, P1584, DOI 10.1175/1520-0469(1983)040<1584:TLHSOD>2.0.CO
  • [2] 2
  • [3] Intraseasonal Predictability of Siberian High and East Asian Winter Monsoon and Its Interdecadal Variability
    Chang, Chih-Pei
    Lu, Mong-Ming
    [J]. JOURNAL OF CLIMATE, 2012, 25 (05) : 1773 - 1778
  • [4] Observational climatology and characteristics of wintertime atmospheric blocking over Ural-Siberia
    Cheung, Ho Nam
    Zhou, Wen
    Shao, Yaping
    Chen, Wen
    Mok, Hing Yim
    Wu, Man Chi
    [J]. CLIMATE DYNAMICS, 2013, 41 (01) : 63 - 79
  • [5] Interannual and Interdecadal Variability of the Number of Cold Days in Hong Kong and Their Relationship with Large-Scale Circulation
    Cheung, Hoffman H. N.
    Zhou, Wen
    Lee, Sai-Ming
    Tong, Hang-Wai
    [J]. MONTHLY WEATHER REVIEW, 2015, 143 (04) : 1438 - 1454
  • [6] The ERA-Interim reanalysis: configuration and performance of the data assimilation system
    Dee, D. P.
    Uppala, S. M.
    Simmons, A. J.
    Berrisford, P.
    Poli, P.
    Kobayashi, S.
    Andrae, U.
    Balmaseda, M. A.
    Balsamo, G.
    Bauer, P.
    Bechtold, P.
    Beljaars, A. C. M.
    van de Berg, L.
    Bidlot, J.
    Bormann, N.
    Delsol, C.
    Dragani, R.
    Fuentes, M.
    Geer, A. J.
    Haimberger, L.
    Healy, S. B.
    Hersbach, H.
    Holm, E. V.
    Isaksen, L.
    Kallberg, P.
    Koehler, M.
    Matricardi, M.
    McNally, A. P.
    Monge-Sanz, B. M.
    Morcrette, J. -J.
    Park, B. -K.
    Peubey, C.
    de Rosnay, P.
    Tavolato, C.
    Thepaut, J. -N.
    Vitart, F.
    [J]. QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 2011, 137 (656) : 553 - 597
  • [7] DUCHON CE, 1979, J APPL METEOROL, V18, P1016, DOI 10.1175/1520-0450(1979)018<1016:LFIOAT>2.0.CO
  • [8] 2
  • [9] Amplified summer warming in Europe-West Asia and Northeast Asia after the mid-1990s
    Hong, Xiaowei
    Lu, Riyu
    Li, Shuanglin
    [J]. ENVIRONMENTAL RESEARCH LETTERS, 2017, 12 (09):
  • [10] Jin Z.H., 1996, SCI ATMOS SIN, V20, P101, DOI [10.3878/j.issn.1006-9895.1996.01.12, DOI 10.3878/J.ISSN.1006-9895.1996.01.12]