Role of Atlantic Multidecadal Oscillation (AMO) in winter intraseasonal variability over Ural
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...
Published in: | Atmospheric and Oceanic Science Letters |
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KeAi Communications Co., Ltd.
2018
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Online Access: | https://doi.org/10.1080/16742834.2018.1526035 https://doaj.org/article/d9f6ea9bca4645b4ab53f418183021ad |
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ftdoajarticles:oai:doaj.org/article:d9f6ea9bca4645b4ab53f418183021ad 2023-05-15T18:41:27+02:00 Role of Atlantic Multidecadal Oscillation (AMO) in winter intraseasonal variability over Ural Shuanglin LI Ding LI Ying CHEN 2018-11-01T00:00:00Z https://doi.org/10.1080/16742834.2018.1526035 https://doaj.org/article/d9f6ea9bca4645b4ab53f418183021ad EN eng KeAi Communications Co., Ltd. http://dx.doi.org/10.1080/16742834.2018.1526035 https://doaj.org/toc/1674-2834 https://doaj.org/toc/2376-6123 1674-2834 2376-6123 doi:10.1080/16742834.2018.1526035 https://doaj.org/article/d9f6ea9bca4645b4ab53f418183021ad Atmospheric and Oceanic Science Letters, Vol 11, Iss 6, Pp 445-453 (2018) Atlantic Multidecadal Oscillation modulation intraseasonal variability atmospheric stationary wave Environmental sciences GE1-350 Oceanography GC1-1581 article 2018 ftdoajarticles https://doi.org/10.1080/16742834.2018.1526035 2022-12-31T06:15:41Z 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. Article in Journal/Newspaper ural mountains Directory of Open Access Journals: DOAJ Articles Atmospheric and Oceanic Science Letters 11 6 445 453 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Atlantic Multidecadal Oscillation modulation intraseasonal variability atmospheric stationary wave Environmental sciences GE1-350 Oceanography GC1-1581 |
spellingShingle |
Atlantic Multidecadal Oscillation modulation intraseasonal variability atmospheric stationary wave Environmental sciences GE1-350 Oceanography GC1-1581 Shuanglin LI Ding LI Ying CHEN Role of Atlantic Multidecadal Oscillation (AMO) in winter intraseasonal variability over Ural |
topic_facet |
Atlantic Multidecadal Oscillation modulation intraseasonal variability atmospheric stationary wave Environmental sciences GE1-350 Oceanography GC1-1581 |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Shuanglin LI Ding LI Ying CHEN |
author_facet |
Shuanglin LI Ding LI Ying CHEN |
author_sort |
Shuanglin LI |
title |
Role of Atlantic Multidecadal Oscillation (AMO) in winter intraseasonal variability over Ural |
title_short |
Role of Atlantic Multidecadal Oscillation (AMO) in winter intraseasonal variability over Ural |
title_full |
Role of Atlantic Multidecadal Oscillation (AMO) in winter intraseasonal variability over Ural |
title_fullStr |
Role of Atlantic Multidecadal Oscillation (AMO) in winter intraseasonal variability over Ural |
title_full_unstemmed |
Role of Atlantic Multidecadal Oscillation (AMO) in winter intraseasonal variability over Ural |
title_sort |
role of atlantic multidecadal oscillation (amo) in winter intraseasonal variability over ural |
publisher |
KeAi Communications Co., Ltd. |
publishDate |
2018 |
url |
https://doi.org/10.1080/16742834.2018.1526035 https://doaj.org/article/d9f6ea9bca4645b4ab53f418183021ad |
genre |
ural mountains |
genre_facet |
ural mountains |
op_source |
Atmospheric and Oceanic Science Letters, Vol 11, Iss 6, Pp 445-453 (2018) |
op_relation |
http://dx.doi.org/10.1080/16742834.2018.1526035 https://doaj.org/toc/1674-2834 https://doaj.org/toc/2376-6123 1674-2834 2376-6123 doi:10.1080/16742834.2018.1526035 https://doaj.org/article/d9f6ea9bca4645b4ab53f418183021ad |
op_doi |
https://doi.org/10.1080/16742834.2018.1526035 |
container_title |
Atmospheric and Oceanic Science Letters |
container_volume |
11 |
container_issue |
6 |
container_start_page |
445 |
op_container_end_page |
453 |
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1766230965314650112 |