Atmospheric teleconnection associated with the Atlantic multidecadal variability in summer: assessment of the CESM1 model
Observational analysis shows that the Atlantic multidecadal variability (AMV) is associated with climate variability in the Northern Hemisphere through a zonal atmospheric teleconnection extending from the North Atlantic Ocean and propagating eastward around the Northern Hemisphere. We studied the f...
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Online Access: | https://doi.org/10.1007/s00382-022-06331-z |
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ftncar:oai:drupal-site.org:articles_26050 2023-10-01T03:57:51+02:00 Atmospheric teleconnection associated with the Atlantic multidecadal variability in summer: assessment of the CESM1 model Si, Dong (author) Hu, Aixue (author) Jiang, Dabang (author) Lang, Xianmei (author) 2023-02-18 https://doi.org/10.1007/s00382-022-06331-z en eng Climate Dynamics--Clim Dyn--0930-7575--1432-0894 articles:26050 doi:10.1007/s00382-022-06331-z ark:/85065/d7988bxz Copyright 2023 The Author(s), under exclusive license to Springer-Verlag GmbH Germany, part of Springer Nature. article Text 2023 ftncar https://doi.org/10.1007/s00382-022-06331-z 2023-09-04T18:21:13Z Observational analysis shows that the Atlantic multidecadal variability (AMV) is associated with climate variability in the Northern Hemisphere through a zonal atmospheric teleconnection extending from the North Atlantic Ocean and propagating eastward around the Northern Hemisphere. We studied the fidelity of model simulations in reproducing the observed summer AMV and the associated impacts on the mid-latitude climate by analysing simulations using the National Centre for Atmospheric Research Community Earth System Model Version 1 (CESM1), including CESM1 North Atlantic idealized and pacemaker simulations, CESM1 large ensemble twentieth century uninitialized simulations and large ensemble initialized CESM1 decadal predictions. To further compare the fidelity of CESM1, we also analysed large ensemble simulations from three other models. Our results suggest that the uninitialized large ensemble simulations from all models can produce an AMV time evolution and its regional climate impacts similar to the observations to certain degree. By initializing the observed oceanic condition in decadal prediction simulations, the simulated AMV and its regional impacts are closer to the observed ones than those in uninitialized ensemble simulations. In addition, the pacemaker simulations that nudged the time-evolving observed North Atlantic sea surface temperature anomalies produce spatiotemporal characteristics of the AMV and AMV climate impacts closer to the observed ones than the uninitialized simulations. We conclude that although coupled models can produce AMV and its regional impacts similar to observed, proper initialization and bias correction of the sea surface temperature spatial and temporal structure can improve this capability. 1844590 Article in Journal/Newspaper North Atlantic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Climate Dynamics 60 3-4 1043 1060 |
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Open Polar |
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OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
Observational analysis shows that the Atlantic multidecadal variability (AMV) is associated with climate variability in the Northern Hemisphere through a zonal atmospheric teleconnection extending from the North Atlantic Ocean and propagating eastward around the Northern Hemisphere. We studied the fidelity of model simulations in reproducing the observed summer AMV and the associated impacts on the mid-latitude climate by analysing simulations using the National Centre for Atmospheric Research Community Earth System Model Version 1 (CESM1), including CESM1 North Atlantic idealized and pacemaker simulations, CESM1 large ensemble twentieth century uninitialized simulations and large ensemble initialized CESM1 decadal predictions. To further compare the fidelity of CESM1, we also analysed large ensemble simulations from three other models. Our results suggest that the uninitialized large ensemble simulations from all models can produce an AMV time evolution and its regional climate impacts similar to the observations to certain degree. By initializing the observed oceanic condition in decadal prediction simulations, the simulated AMV and its regional impacts are closer to the observed ones than those in uninitialized ensemble simulations. In addition, the pacemaker simulations that nudged the time-evolving observed North Atlantic sea surface temperature anomalies produce spatiotemporal characteristics of the AMV and AMV climate impacts closer to the observed ones than the uninitialized simulations. We conclude that although coupled models can produce AMV and its regional impacts similar to observed, proper initialization and bias correction of the sea surface temperature spatial and temporal structure can improve this capability. 1844590 |
author2 |
Si, Dong (author) Hu, Aixue (author) Jiang, Dabang (author) Lang, Xianmei (author) |
format |
Article in Journal/Newspaper |
title |
Atmospheric teleconnection associated with the Atlantic multidecadal variability in summer: assessment of the CESM1 model |
spellingShingle |
Atmospheric teleconnection associated with the Atlantic multidecadal variability in summer: assessment of the CESM1 model |
title_short |
Atmospheric teleconnection associated with the Atlantic multidecadal variability in summer: assessment of the CESM1 model |
title_full |
Atmospheric teleconnection associated with the Atlantic multidecadal variability in summer: assessment of the CESM1 model |
title_fullStr |
Atmospheric teleconnection associated with the Atlantic multidecadal variability in summer: assessment of the CESM1 model |
title_full_unstemmed |
Atmospheric teleconnection associated with the Atlantic multidecadal variability in summer: assessment of the CESM1 model |
title_sort |
atmospheric teleconnection associated with the atlantic multidecadal variability in summer: assessment of the cesm1 model |
publishDate |
2023 |
url |
https://doi.org/10.1007/s00382-022-06331-z |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Climate Dynamics--Clim Dyn--0930-7575--1432-0894 articles:26050 doi:10.1007/s00382-022-06331-z ark:/85065/d7988bxz |
op_rights |
Copyright 2023 The Author(s), under exclusive license to Springer-Verlag GmbH Germany, part of Springer Nature. |
op_doi |
https://doi.org/10.1007/s00382-022-06331-z |
container_title |
Climate Dynamics |
container_volume |
60 |
container_issue |
3-4 |
container_start_page |
1043 |
op_container_end_page |
1060 |
_version_ |
1778529979274887168 |