Early-to-Late Winter 20th Century North Atlantic Multidecadal Atmospheric Variability in Observations, CMIP5 and CMIP6

被引:7
|
作者
Bracegirdle, Thomas J. [1 ]
机构
[1] British Antarctic Survey, Cambridge, England
基金
英国自然环境研究理事会; 美国海洋和大气管理局;
关键词
CMIP5; CMIP6; low-frequency variability; climate model; reanalysis; CLIMATE VARIABILITY; SURFACE-TEMPERATURE; JET-STREAM; OCEAN; CIRCULATION;
D O I
10.1029/2022GL098212
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The strong multidecadal variability in North Atlantic (NA) winter atmospheric circulation is poorly understood and appears too weak in climate models. Recent research has shown peak atmospheric multidecadal variability over the NA in late winter, particularly March, linked to Atlantic multidecadal variability (AMV) of the ocean. Here a range of NA atmospheric circulation indices are assessed to provide a comprehensive picture of early-to-late winter low-frequency variability and its representation in the latest generation of climate models (Coupled Model Intercomparison Project Phase 6 [CMIP6]). As found for CMIP5, CMIP6 models exhibit too-weak multidecadal NA atmospheric variability compared to reanalysis data over the period 1862-2005. Consistent with previous research, the eastern part of the NA westerly jet (U700NA) exhibits peak low-frequency variability in March. However, for NA-wide jet speed and the NAO, low-frequency variability and model-reanalysis discrepancies are strongest in January and February, associated with too-weak NA ocean-atmosphere linkages.
引用
收藏
页数:9
相关论文
共 39 条
  • [1] The potential mechanisms of the dominant timescale of AMOC multidecadal variability in CMIP6/CMIP5 preindustrial simulations
    Xiaofan Ma
    Gang Huang
    Xichen Li
    Shouwei Li
    [J]. Climate Dynamics, 2023, 60 : 2131 - 2145
  • [2] The potential mechanisms of the dominant timescale of AMOC multidecadal variability in CMIP6/CMIP5 preindustrial simulations
    Ma, Xiaofan
    Huang, Gang
    Li, Xichen
    Li, Shouwei
    [J]. CLIMATE DYNAMICS, 2023, 60 (7-8) : 2131 - 2145
  • [3] Simulations of the North Tropical Atlantic Mode-ENSO Connection in CMIP5 and CMIP6 Models
    Tian, Qi
    Ding, Ruiqiang
    Li, Jianping
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2023, 128 (16)
  • [4] Interannual Variability of the Winter North Atlantic Storm Track in CMIP5 Models
    Yang, Minghao
    Zuo, Ruiting
    Wang, Liqiong
    Chen, Xiong
    Tan, Yanke
    Li, Xin
    [J]. SOLA, 2018, 14 : 74 - 78
  • [5] Multidecadal fluctuations of the North Atlantic Ocean and feedback on the winter climate in CMIP5 control simulations
    Peings, Yannick
    Simpkins, Graham
    Magnusdottir, Gudrun
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2016, 121 (06) : 2571 - 2592
  • [6] The Asian summer monsoon: an intercomparison of CMIP5 vs. CMIP3 simulations of the late 20th century
    Sperber, K. R.
    Annamalai, H.
    Kang, I. -S.
    Kitoh, A.
    Moise, A.
    Turner, A.
    Wang, B.
    Zhou, T.
    [J]. CLIMATE DYNAMICS, 2013, 41 (9-10) : 2711 - 2744
  • [7] The Asian summer monsoon: an intercomparison of CMIP5 vs. CMIP3 simulations of the late 20th century
    K. R. Sperber
    H. Annamalai
    I.-S. Kang
    A. Kitoh
    A. Moise
    A. Turner
    B. Wang
    T. Zhou
    [J]. Climate Dynamics, 2013, 41 : 2711 - 2744
  • [8] Representation of the boreal summer tropical Atlantic–western North Pacific teleconnection in AGCMs: comparison of CMIP5 and CMIP6
    Jinqing Zuo
    Chenghu Sun
    Weijing Li
    Jie Wu
    Hong-Chang Ren
    [J]. Climate Dynamics, 2020, 55 : 3025 - 3041
  • [9] Drivers of low-frequency Sahel precipitation variability: comparing CMIP5 and CMIP6 ensemble means with observations
    Rebecca Jean Herman
    Michela Biasutti
    Yochanan Kushnir
    [J]. Climate Dynamics, 2023, 61 : 4449 - 4470
  • [10] Drivers of low-frequency Sahel precipitation variability: comparing CMIP5 and CMIP6 ensemble means with observations
    Herman, Rebecca Jean
    Biasutti, Michela
    Kushnir, Yochanan
    [J]. CLIMATE DYNAMICS, 2023, 61 (9-10) : 4449 - 4470