Modulation of the Aleutian-Icelandic Low Seesaw and Its Surface Impacts by the Atlantic Multidecadal Oscillation

Early studies suggested that the Aleutian-Icelandic low seesaw （AIS） features multidecadal variation. In this study, themultidecadal modulation of the AIS and associated surface climate by the Atlantic Multidecadal Oscillation （AMO） duringlate winter （February-March） is explored with observational d...

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Bibliographic Details
Published in:Advances in atmospheric sciences 2018, Vol.35 (1), p.95-105
Main Authors: Li, Fei, Orsolini, Yvan J., Wang, Huijun, Gao, Yongqi, He, Shengping
Format: Article
Language:English
Subjects:
Aleutian low
Aleutian-Icelandic
low
seesaw,
Atlantic
Multidecadal
Oscillation,
Pacific-North
America-Atlantic
pattern,stratospheric
polar
vortex
Atlantic Oscillation
Atmospheric blocking
Atmospheric Sciences
Climate
Earth and Environmental Science
Earth Sciences
Geophysics/Geodesy
Meteorology
Original Paper
Polar vortex
Precipitation
Stratosphere
Stratospheric polar vortexes
Surface temperature
Towards Improving Understanding and Prediction of Arctic Change and its Linkage with Eurasian Mid-latitude Weather and Climate
Wave packets
Wave trains
Winter
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Summary:Early studies suggested that the Aleutian-Icelandic low seesaw （AIS） features multidecadal variation. In this study, themultidecadal modulation of the AIS and associated surface climate by the Atlantic Multidecadal Oscillation （AMO） duringlate winter （February-March） is explored with observational data. It is shown that, in the cold phase of the AMO （AMOI-）,a clear AIS is established, while this is not the case in the warm phase of the AMO （AMO[＋）. The surface climate overEurasia is significantly influenced by the AMO＇s modulation of the Aleutian low （AL）. For example, the weak AL in AMOI-displays warmer surface temperatures over the entire Far East and along the Russian Arctic coast and into Northern Europe,but only over the Russian Far East in AMO{＋. Similarly, precipitation decreases over central Europe with the weak AL inAMOI-, but decreases over northern Europe and increases over southern Europe in AMOI＋.
ISSN:0256-1530
1861-9533
DOI:10.1007/s00376-017-7028-z