Daily to decadal modulation of jet variability
Author Posting. © American Meteorological Society, 2018. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 30 (2018): 1297-1314, doi:10.1175/JCLI-D-17-0286.1. The variance...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/9634 2023-05-15T17:31:35+02:00 Daily to decadal modulation of jet variability Woollings, Tim Barnes, Elizabeth Hoskins, Brian Kwon, Young-Oh Lee, Robert W. Li, Camille Madonna, Erica McGraw, Marie Parker, Tess Rodrigues, Regina Spensberger, Clemens Williams, Keith 2018-01-29 https://hdl.handle.net/1912/9634 en_US eng American Meteorological Society https://doi.org/10.1175/JCLI-D-17-0286.1 Journal of Climate 30 (2018): 1297-1314 https://hdl.handle.net/1912/9634 doi:10.1175/JCLI-D-17-0286.1 Journal of Climate 30 (2018): 1297-1314 doi:10.1175/JCLI-D-17-0286.1 Atmospheric circulation Jets North Atlantic Oscillation Baroclinic models Decadal variability Article 2018 ftwhoas https://doi.org/10.1175/JCLI-D-17-0286.1 2022-05-28T23:00:09Z Author Posting. © American Meteorological Society, 2018. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 30 (2018): 1297-1314, doi:10.1175/JCLI-D-17-0286.1. The variance of a jet’s position in latitude is found to be related to its average speed: when a jet becomes stronger, its variability in latitude decreases. This relationship is shown to hold for observed midlatitude jets around the world and also across a hierarchy of numerical models. North Atlantic jet variability is shown to be modulated on decadal time scales, with decades of a strong, steady jet being interspersed with decades of a weak, variable jet. These modulations are also related to variations in the basinwide occurrence of high-impact blocking events. A picture emerges of complex multidecadal jet variability in which recent decades do not appear unusual. An underlying barotropic mechanism is proposed to explain this behavior, related to the change in refractive properties of a jet as it strengthens, and the subsequent effect on the distribution of Rossby wave breaking. We would like to acknowledge funding from NERC and the Research Council of Norway project jetSTREAM under Grants NE/ L01047X/1 (IMPETUS) and 231716, respectively, for a contribution to the work presented here. EAB is supported in part by the NSF Climate and Large-Scale Dynamics Program under Grant 1545675. Y-OK was supported by the NSF Climate and Large-Scale Dynamics Program under Grant 1355339. KW was supported by the Joint UK BEIS/Defra Met Office Hadley Centre Climate Programme (GA01101). RL was supported by the Met Office and the National Centre for Atmospheric Science. 2018-07-29 Article in Journal/Newspaper North Atlantic North Atlantic oscillation Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Norway Journal of Climate 31 4 1297 1314 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Atmospheric circulation Jets North Atlantic Oscillation Baroclinic models Decadal variability |
spellingShingle |
Atmospheric circulation Jets North Atlantic Oscillation Baroclinic models Decadal variability Woollings, Tim Barnes, Elizabeth Hoskins, Brian Kwon, Young-Oh Lee, Robert W. Li, Camille Madonna, Erica McGraw, Marie Parker, Tess Rodrigues, Regina Spensberger, Clemens Williams, Keith Daily to decadal modulation of jet variability |
topic_facet |
Atmospheric circulation Jets North Atlantic Oscillation Baroclinic models Decadal variability |
description |
Author Posting. © American Meteorological Society, 2018. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 30 (2018): 1297-1314, doi:10.1175/JCLI-D-17-0286.1. The variance of a jet’s position in latitude is found to be related to its average speed: when a jet becomes stronger, its variability in latitude decreases. This relationship is shown to hold for observed midlatitude jets around the world and also across a hierarchy of numerical models. North Atlantic jet variability is shown to be modulated on decadal time scales, with decades of a strong, steady jet being interspersed with decades of a weak, variable jet. These modulations are also related to variations in the basinwide occurrence of high-impact blocking events. A picture emerges of complex multidecadal jet variability in which recent decades do not appear unusual. An underlying barotropic mechanism is proposed to explain this behavior, related to the change in refractive properties of a jet as it strengthens, and the subsequent effect on the distribution of Rossby wave breaking. We would like to acknowledge funding from NERC and the Research Council of Norway project jetSTREAM under Grants NE/ L01047X/1 (IMPETUS) and 231716, respectively, for a contribution to the work presented here. EAB is supported in part by the NSF Climate and Large-Scale Dynamics Program under Grant 1545675. Y-OK was supported by the NSF Climate and Large-Scale Dynamics Program under Grant 1355339. KW was supported by the Joint UK BEIS/Defra Met Office Hadley Centre Climate Programme (GA01101). RL was supported by the Met Office and the National Centre for Atmospheric Science. 2018-07-29 |
format |
Article in Journal/Newspaper |
author |
Woollings, Tim Barnes, Elizabeth Hoskins, Brian Kwon, Young-Oh Lee, Robert W. Li, Camille Madonna, Erica McGraw, Marie Parker, Tess Rodrigues, Regina Spensberger, Clemens Williams, Keith |
author_facet |
Woollings, Tim Barnes, Elizabeth Hoskins, Brian Kwon, Young-Oh Lee, Robert W. Li, Camille Madonna, Erica McGraw, Marie Parker, Tess Rodrigues, Regina Spensberger, Clemens Williams, Keith |
author_sort |
Woollings, Tim |
title |
Daily to decadal modulation of jet variability |
title_short |
Daily to decadal modulation of jet variability |
title_full |
Daily to decadal modulation of jet variability |
title_fullStr |
Daily to decadal modulation of jet variability |
title_full_unstemmed |
Daily to decadal modulation of jet variability |
title_sort |
daily to decadal modulation of jet variability |
publisher |
American Meteorological Society |
publishDate |
2018 |
url |
https://hdl.handle.net/1912/9634 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Journal of Climate 30 (2018): 1297-1314 doi:10.1175/JCLI-D-17-0286.1 |
op_relation |
https://doi.org/10.1175/JCLI-D-17-0286.1 Journal of Climate 30 (2018): 1297-1314 https://hdl.handle.net/1912/9634 doi:10.1175/JCLI-D-17-0286.1 |
op_doi |
https://doi.org/10.1175/JCLI-D-17-0286.1 |
container_title |
Journal of Climate |
container_volume |
31 |
container_issue |
4 |
container_start_page |
1297 |
op_container_end_page |
1314 |
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1766129250490908672 |