A synoptic climatology of strong along‐channel winds on the Coast of British Columbia, Canada
ABSTRACT A synoptic climatology using mean sea level pressure and 500‐ hPa geopotential height composites is conducted for strong along‐channel winds that occur through five of the channels dissecting British Columbia's coast. Seasonal (winter, summer) and directional (inflow, air moving from t...
Published in: | International Journal of Climatology |
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crwiley:10.1002/joc.4853 2024-06-23T07:50:41+00:00 A synoptic climatology of strong along‐channel winds on the Coast of British Columbia, Canada Bakri, Talaat Jackson, Peter Doherty, Ford NSERC Canadian Natural Science and Engineering Research Council Discovery Damascus University 2016 http://dx.doi.org/10.1002/joc.4853 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.4853 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.4853 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor International Journal of Climatology volume 37, issue 5, page 2398-2412 ISSN 0899-8418 1097-0088 journal-article 2016 crwiley https://doi.org/10.1002/joc.4853 2024-06-11T04:47:52Z ABSTRACT A synoptic climatology using mean sea level pressure and 500‐ hPa geopotential height composites is conducted for strong along‐channel winds that occur through five of the channels dissecting British Columbia's coast. Seasonal (winter, summer) and directional (inflow, air moving from the coast inland; outflow, air moving from inland towards the coast) partitioning of the winds, results in four distinct along‐channel winds that occur: summertime inflow, summertime outflow, wintertime inflow and wintertime outflow. Composite analyses using reanalysis data and in situ observations are used to examine each wind type at all locations. Wintertime composites produce patterns that are distinct from the overall winter climatology, in which outflows occur when an arctic surface high‐pressure area on the inland side of the coastal mountains is accompanied by the presence of an area of low surface pressure in the northeastern Pacific. Inflow composites in the winter indicate low‐pressure areas associated with mid‐latitude cyclones over the Gulf of Alaska. Summertime composites are similar to the overall summer climatology; therefore, other approaches are applied to explain these winds. We analyse 104 summertime inflow events at three locations using surface analysis charts for 13 summer seasons. The analysis reveals the importance of fronts at the time of inflows, with fronts associated with almost half of the events. Non‐hierarchical clustering analysis is applied for the summertime inflow events. The clustering analysis gives a better explanation of the summertime inflows than the composites. This is achieved by grouping events into different clusters, allowing for better illustration of the variance between the clusters. Article in Journal/Newspaper Arctic Alaska Wiley Online Library Arctic British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) Canada Gulf of Alaska Pacific International Journal of Climatology 37 5 2398 2412 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
ABSTRACT A synoptic climatology using mean sea level pressure and 500‐ hPa geopotential height composites is conducted for strong along‐channel winds that occur through five of the channels dissecting British Columbia's coast. Seasonal (winter, summer) and directional (inflow, air moving from the coast inland; outflow, air moving from inland towards the coast) partitioning of the winds, results in four distinct along‐channel winds that occur: summertime inflow, summertime outflow, wintertime inflow and wintertime outflow. Composite analyses using reanalysis data and in situ observations are used to examine each wind type at all locations. Wintertime composites produce patterns that are distinct from the overall winter climatology, in which outflows occur when an arctic surface high‐pressure area on the inland side of the coastal mountains is accompanied by the presence of an area of low surface pressure in the northeastern Pacific. Inflow composites in the winter indicate low‐pressure areas associated with mid‐latitude cyclones over the Gulf of Alaska. Summertime composites are similar to the overall summer climatology; therefore, other approaches are applied to explain these winds. We analyse 104 summertime inflow events at three locations using surface analysis charts for 13 summer seasons. The analysis reveals the importance of fronts at the time of inflows, with fronts associated with almost half of the events. Non‐hierarchical clustering analysis is applied for the summertime inflow events. The clustering analysis gives a better explanation of the summertime inflows than the composites. This is achieved by grouping events into different clusters, allowing for better illustration of the variance between the clusters. |
author2 |
NSERC Canadian Natural Science and Engineering Research Council Discovery Damascus University |
format |
Article in Journal/Newspaper |
author |
Bakri, Talaat Jackson, Peter Doherty, Ford |
spellingShingle |
Bakri, Talaat Jackson, Peter Doherty, Ford A synoptic climatology of strong along‐channel winds on the Coast of British Columbia, Canada |
author_facet |
Bakri, Talaat Jackson, Peter Doherty, Ford |
author_sort |
Bakri, Talaat |
title |
A synoptic climatology of strong along‐channel winds on the Coast of British Columbia, Canada |
title_short |
A synoptic climatology of strong along‐channel winds on the Coast of British Columbia, Canada |
title_full |
A synoptic climatology of strong along‐channel winds on the Coast of British Columbia, Canada |
title_fullStr |
A synoptic climatology of strong along‐channel winds on the Coast of British Columbia, Canada |
title_full_unstemmed |
A synoptic climatology of strong along‐channel winds on the Coast of British Columbia, Canada |
title_sort |
synoptic climatology of strong along‐channel winds on the coast of british columbia, canada |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1002/joc.4853 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.4853 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.4853 |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) |
geographic |
Arctic British Columbia Canada Gulf of Alaska Pacific |
geographic_facet |
Arctic British Columbia Canada Gulf of Alaska Pacific |
genre |
Arctic Alaska |
genre_facet |
Arctic Alaska |
op_source |
International Journal of Climatology volume 37, issue 5, page 2398-2412 ISSN 0899-8418 1097-0088 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/joc.4853 |
container_title |
International Journal of Climatology |
container_volume |
37 |
container_issue |
5 |
container_start_page |
2398 |
op_container_end_page |
2412 |
_version_ |
1802641603132653568 |