A climatology of wintertime low-level jets in Nares Strait
Intense, southward low-level winds are common in Nares Strait, between Ellesmere Island and northern Greenland. The steep topography along Nares Strait leads to channelling effects, resulting in an along-strait flow. This research study presents a 30-year climatology of the flow regime from simulati...
Published in: | Polar Research |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Norwegian Polar Institute
2021
|
Subjects: | |
Online Access: | https://doi.org/10.33265/polar.v40.3622 https://doaj.org/article/55b1a70d1d0e499c9e1b254e8b7b794e |
id |
ftdoajarticles:oai:doaj.org/article:55b1a70d1d0e499c9e1b254e8b7b794e |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:55b1a70d1d0e499c9e1b254e8b7b794e 2023-05-15T15:12:54+02:00 A climatology of wintertime low-level jets in Nares Strait Svenja H.E. Kohnemann Günther Heinemann 2021-04-01T00:00:00Z https://doi.org/10.33265/polar.v40.3622 https://doaj.org/article/55b1a70d1d0e499c9e1b254e8b7b794e EN eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/3622/13482 https://doaj.org/toc/0800-0395 https://doaj.org/toc/1751-8369 0800-0395 1751-8369 doi:10.33265/polar.v40.3622 https://doaj.org/article/55b1a70d1d0e499c9e1b254e8b7b794e Polar Research, Vol 40, Iss 0, Pp 1-16 (2021) arctic gap flow atmospheric modelling greenland north water polynya wind Environmental sciences GE1-350 Oceanography GC1-1581 article 2021 ftdoajarticles https://doi.org/10.33265/polar.v40.3622 2022-12-31T10:13:02Z Intense, southward low-level winds are common in Nares Strait, between Ellesmere Island and northern Greenland. The steep topography along Nares Strait leads to channelling effects, resulting in an along-strait flow. This research study presents a 30-year climatology of the flow regime from simulations of the COSMO-CLM climate model. The simulations are available for the winter periods (November–April) 1987/88 to 2016/17, and thus, cover a period long enough to give robust long-term characteristics of Nares Strait. The horizontal resolution of 15 km is high enough to represent the complex terrain and the meteorological conditions realistically. The 30-year climatology shows that LLJs associated with gap flows are a climatological feature of Nares Strait. The maximum of the mean 10-m wind speed is around 12 m s-1 and is located at the southern exit of Smith Sound. The wind speed is strongly related to the pressure gradient. Single events reach wind speeds of 40 m s-1 in the daily mean. The LLJs are associated with gap flows within the narrowest parts of the strait under stably stratified conditions, with the main LLJ occurring at 100–250 m height. With increasing mountain Froude number, the LLJ wind speed and height increase. The frequency of strong wind events (>20 m s-1 in the daily mean) for the 10 m wind shows a strong interannual variability with an average of 15 events per winter. Channelled winds have a strong impact on the formation of the North Water polynya. Article in Journal/Newspaper Arctic Ellesmere Island Greenland Nares strait Polar Research Smith sound Directory of Open Access Journals: DOAJ Articles Arctic Ellesmere Island Greenland Nares ENVELOPE(158.167,158.167,-81.450,-81.450) Smith Sound ENVELOPE(-73.996,-73.996,78.419,78.419) Polar Research 40 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
arctic gap flow atmospheric modelling greenland north water polynya wind Environmental sciences GE1-350 Oceanography GC1-1581 |
spellingShingle |
arctic gap flow atmospheric modelling greenland north water polynya wind Environmental sciences GE1-350 Oceanography GC1-1581 Svenja H.E. Kohnemann Günther Heinemann A climatology of wintertime low-level jets in Nares Strait |
topic_facet |
arctic gap flow atmospheric modelling greenland north water polynya wind Environmental sciences GE1-350 Oceanography GC1-1581 |
description |
Intense, southward low-level winds are common in Nares Strait, between Ellesmere Island and northern Greenland. The steep topography along Nares Strait leads to channelling effects, resulting in an along-strait flow. This research study presents a 30-year climatology of the flow regime from simulations of the COSMO-CLM climate model. The simulations are available for the winter periods (November–April) 1987/88 to 2016/17, and thus, cover a period long enough to give robust long-term characteristics of Nares Strait. The horizontal resolution of 15 km is high enough to represent the complex terrain and the meteorological conditions realistically. The 30-year climatology shows that LLJs associated with gap flows are a climatological feature of Nares Strait. The maximum of the mean 10-m wind speed is around 12 m s-1 and is located at the southern exit of Smith Sound. The wind speed is strongly related to the pressure gradient. Single events reach wind speeds of 40 m s-1 in the daily mean. The LLJs are associated with gap flows within the narrowest parts of the strait under stably stratified conditions, with the main LLJ occurring at 100–250 m height. With increasing mountain Froude number, the LLJ wind speed and height increase. The frequency of strong wind events (>20 m s-1 in the daily mean) for the 10 m wind shows a strong interannual variability with an average of 15 events per winter. Channelled winds have a strong impact on the formation of the North Water polynya. |
format |
Article in Journal/Newspaper |
author |
Svenja H.E. Kohnemann Günther Heinemann |
author_facet |
Svenja H.E. Kohnemann Günther Heinemann |
author_sort |
Svenja H.E. Kohnemann |
title |
A climatology of wintertime low-level jets in Nares Strait |
title_short |
A climatology of wintertime low-level jets in Nares Strait |
title_full |
A climatology of wintertime low-level jets in Nares Strait |
title_fullStr |
A climatology of wintertime low-level jets in Nares Strait |
title_full_unstemmed |
A climatology of wintertime low-level jets in Nares Strait |
title_sort |
climatology of wintertime low-level jets in nares strait |
publisher |
Norwegian Polar Institute |
publishDate |
2021 |
url |
https://doi.org/10.33265/polar.v40.3622 https://doaj.org/article/55b1a70d1d0e499c9e1b254e8b7b794e |
long_lat |
ENVELOPE(158.167,158.167,-81.450,-81.450) ENVELOPE(-73.996,-73.996,78.419,78.419) |
geographic |
Arctic Ellesmere Island Greenland Nares Smith Sound |
geographic_facet |
Arctic Ellesmere Island Greenland Nares Smith Sound |
genre |
Arctic Ellesmere Island Greenland Nares strait Polar Research Smith sound |
genre_facet |
Arctic Ellesmere Island Greenland Nares strait Polar Research Smith sound |
op_source |
Polar Research, Vol 40, Iss 0, Pp 1-16 (2021) |
op_relation |
https://polarresearch.net/index.php/polar/article/view/3622/13482 https://doaj.org/toc/0800-0395 https://doaj.org/toc/1751-8369 0800-0395 1751-8369 doi:10.33265/polar.v40.3622 https://doaj.org/article/55b1a70d1d0e499c9e1b254e8b7b794e |
op_doi |
https://doi.org/10.33265/polar.v40.3622 |
container_title |
Polar Research |
container_volume |
40 |
_version_ |
1766343534057619456 |