dc.contributor.author | Cheung, Ho Nam | |
dc.contributor.author | Omrani, Nour-Eddine | |
dc.contributor.author | Ogawa, Fumiaki | |
dc.contributor.author | Keenlyside, Noel Sebastian | |
dc.contributor.author | Nakamura, Hisashi | |
dc.contributor.author | Zhou, Wen | |
dc.date.accessioned | 2023-07-03T12:40:52Z | |
dc.date.available | 2023-07-03T12:40:52Z | |
dc.date.created | 2023-06-15T17:29:10Z | |
dc.date.issued | 2023 | |
dc.identifier.issn | 2397-3722 | |
dc.identifier.uri | https://hdl.handle.net/11250/3075384 | |
dc.description.abstract | Atmospheric blocking is a crucial driver of extreme weather events, but its climatological frequency is largely underestimated in state-of-the-art climate models, especially around the North Atlantic. While air-sea interaction along the North Atlantic oceanic frontal region is known to influence Atlantic blocking activity, remote effects from the Pacific have been less studied. Here we use semi-idealised experiments with an atmospheric general circulation model to demonstrate that the mid-latitude Pacific oceanic front is crucial for climatological Atlantic blocking activity. The front intensifies the Pacific eddy-driven jet that extends eastward towards the North Atlantic. The eastward-extended Pacific jet reinforces the North Atlantic circulation response to the Atlantic oceanic front, including the storm track activity and the eddy-driven jet. The strengthening of the eddy-driven jet reduces the Greenland blocking frequency. Moreover, the Pacific oceanic front greatly strengthens the stationary planetary-scale ridge in Europe. Together with a stronger northeastward extension of the Atlantic storm track, enhanced interaction between extratropical cyclones and the European ridge favours the occurrence of Euro-Atlantic blocking. Therefore, the North Atlantic circulation response amplified remotely by the Pacific oceanic front substantially increases Euro-Atlantic blocking frequency while decreasing Greenland blocking frequency. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Nature Research | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Pacific oceanic front amplifies the impact of Atlantic oceanic front on North Atlantic blocking | en_US |
dc.type | Journal article | en_US |
dc.type | Peer reviewed | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | Copyright 2023 the authors | en_US |
dc.source.articlenumber | 61 | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.doi | 10.1038/s41612-023-00370-x | |
dc.identifier.cristin | 2155031 | |
dc.source.journal | npj Climate and Atmospheric Science | en_US |
dc.identifier.citation | npj Climate and Atmospheric Science. 2023, 6, 61. | en_US |
dc.source.volume | 6 | en_US |