Spontaneous inertia-gravity wave emission from a nonlinear critical layer in the stratosphere
Using a nonlinear global primitive equation model, spontaneous inertia‐gravity wave (IGW) emission is investigated in an idealized representation of the stratospheric polar night. It is shown that IGWs are spontaneously emitted in the interior of the fluid in a jet exit region that develops around a...
Published in: | Quarterly Journal of the Royal Meteorological Society |
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Online Access: | https://hdl.handle.net/10023/21454 https://doi.org/10.1002/qj.3750 |
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/21454 2024-06-02T08:13:30+00:00 Spontaneous inertia-gravity wave emission from a nonlinear critical layer in the stratosphere Polichtchouk, Inna Scott, Richard K. University of St Andrews. Applied Mathematics 2021-02-19 6282478 application/pdf https://hdl.handle.net/10023/21454 https://doi.org/10.1002/qj.3750 eng eng Quarterly Journal of the Royal Meteorological Society 266204386 b307f62b-d5d2-436f-b621-38fee8cce247 85079893995 000514238300001 Polichtchouk , I & Scott , R K 2020 , ' Spontaneous inertia-gravity wave emission from a nonlinear critical layer in the stratosphere ' , Quarterly Journal of the Royal Meteorological Society , vol. Early View . https://doi.org/10.1002/qj.3750 0035-9009 RIS: urn:FEA5A66120B3D01807DC1956026CF9B2 ORCID: /0000-0001-5624-5128/work/70618970 https://hdl.handle.net/10023/21454 doi:10.1002/qj.3750 Idealized numerical study Inertia-gravity waves Primitive equations Spontaneous emission Stratosphere GE Environmental Sciences QA Mathematics T-NDAS GE QA Journal article 2021 ftstandrewserep https://doi.org/10.1002/qj.3750 2024-05-07T23:31:42Z Using a nonlinear global primitive equation model, spontaneous inertia‐gravity wave (IGW) emission is investigated in an idealized representation of the stratospheric polar night. It is shown that IGWs are spontaneously emitted in the interior of the fluid in a jet exit region that develops around a nonlinear Rossby wave critical layer. Two key ingredients for the generation are identified: the presence of a Rossby wave guide on the polar night jet; and a zero wind line on the jet flank that gives rise to nonlinear Rossby wave breaking and strong distortion of the flow. The emission of IGWs appears here as a quasi‐steady process that begins at a well‐defined time when the flow deformation becomes large enough. Part of the emitted IGWs undergoes wave capture by the cat's‐eye flow in a Rossby wave critical layer. Another part – in the form of a well‐defined IGW packet – escapes the wave capture limit, and propagates away into the far field. The propagating wave packet is numerically well‐converged to increases in both vertical and horizontal resolution and thus provides an ideal test bed for understanding IGW emission and informing non‐orographic gravity wave drag parametrization design. Peer reviewed Article in Journal/Newspaper polar night University of St Andrews: Digital Research Repository Quarterly Journal of the Royal Meteorological Society 146 728 1516 1528 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
Idealized numerical study Inertia-gravity waves Primitive equations Spontaneous emission Stratosphere GE Environmental Sciences QA Mathematics T-NDAS GE QA |
spellingShingle |
Idealized numerical study Inertia-gravity waves Primitive equations Spontaneous emission Stratosphere GE Environmental Sciences QA Mathematics T-NDAS GE QA Polichtchouk, Inna Scott, Richard K. Spontaneous inertia-gravity wave emission from a nonlinear critical layer in the stratosphere |
topic_facet |
Idealized numerical study Inertia-gravity waves Primitive equations Spontaneous emission Stratosphere GE Environmental Sciences QA Mathematics T-NDAS GE QA |
description |
Using a nonlinear global primitive equation model, spontaneous inertia‐gravity wave (IGW) emission is investigated in an idealized representation of the stratospheric polar night. It is shown that IGWs are spontaneously emitted in the interior of the fluid in a jet exit region that develops around a nonlinear Rossby wave critical layer. Two key ingredients for the generation are identified: the presence of a Rossby wave guide on the polar night jet; and a zero wind line on the jet flank that gives rise to nonlinear Rossby wave breaking and strong distortion of the flow. The emission of IGWs appears here as a quasi‐steady process that begins at a well‐defined time when the flow deformation becomes large enough. Part of the emitted IGWs undergoes wave capture by the cat's‐eye flow in a Rossby wave critical layer. Another part – in the form of a well‐defined IGW packet – escapes the wave capture limit, and propagates away into the far field. The propagating wave packet is numerically well‐converged to increases in both vertical and horizontal resolution and thus provides an ideal test bed for understanding IGW emission and informing non‐orographic gravity wave drag parametrization design. Peer reviewed |
author2 |
University of St Andrews. Applied Mathematics |
format |
Article in Journal/Newspaper |
author |
Polichtchouk, Inna Scott, Richard K. |
author_facet |
Polichtchouk, Inna Scott, Richard K. |
author_sort |
Polichtchouk, Inna |
title |
Spontaneous inertia-gravity wave emission from a nonlinear critical layer in the stratosphere |
title_short |
Spontaneous inertia-gravity wave emission from a nonlinear critical layer in the stratosphere |
title_full |
Spontaneous inertia-gravity wave emission from a nonlinear critical layer in the stratosphere |
title_fullStr |
Spontaneous inertia-gravity wave emission from a nonlinear critical layer in the stratosphere |
title_full_unstemmed |
Spontaneous inertia-gravity wave emission from a nonlinear critical layer in the stratosphere |
title_sort |
spontaneous inertia-gravity wave emission from a nonlinear critical layer in the stratosphere |
publishDate |
2021 |
url |
https://hdl.handle.net/10023/21454 https://doi.org/10.1002/qj.3750 |
genre |
polar night |
genre_facet |
polar night |
op_relation |
Quarterly Journal of the Royal Meteorological Society 266204386 b307f62b-d5d2-436f-b621-38fee8cce247 85079893995 000514238300001 Polichtchouk , I & Scott , R K 2020 , ' Spontaneous inertia-gravity wave emission from a nonlinear critical layer in the stratosphere ' , Quarterly Journal of the Royal Meteorological Society , vol. Early View . https://doi.org/10.1002/qj.3750 0035-9009 RIS: urn:FEA5A66120B3D01807DC1956026CF9B2 ORCID: /0000-0001-5624-5128/work/70618970 https://hdl.handle.net/10023/21454 doi:10.1002/qj.3750 |
op_doi |
https://doi.org/10.1002/qj.3750 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
146 |
container_issue |
728 |
container_start_page |
1516 |
op_container_end_page |
1528 |
_version_ |
1800737029424676864 |