Climatological study of airflow channelling in relation to surface geostrophic wind
Abstract The aim of this study was to climatologically investigate forced and pressure‐driven channelling flow in the Kitakami Basin, Japan, through the use of observational surface wind and sea‐level pressure data collected over 23 years, which corresponded to 15,584 channelling flow events. Our re...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-07-01
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| Series: | Meteorological Applications |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/met.2082 |
| _version_ | 1797796572085354496 |
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| author | Ryogo Sato Hiroyuki Kusaka |
| author_facet | Ryogo Sato Hiroyuki Kusaka |
| author_sort | Ryogo Sato |
| collection | DOAJ |
| description | Abstract The aim of this study was to climatologically investigate forced and pressure‐driven channelling flow in the Kitakami Basin, Japan, through the use of observational surface wind and sea‐level pressure data collected over 23 years, which corresponded to 15,584 channelling flow events. Our results indicated that forced channelling tends to occur when the direction of the surface geostrophic wind is parallel to the valley axis. Contrastingly, pressure‐driven channelling tends to occur when the component perpendicular to the valley axis of the surface geostrophic wind is larger than that parallel to the valley axis of the surface geostrophic wind. The channelling flow type was determined by the wind direction of the surface geostrophic wind, which was more pronounced when the mountain Froude number of the flow across the valley was less than 1. This indicates that the type of channelling flow depends on the surface geostrophic wind speed. Moreover, neither channelling flow type was dominant when the component parallel to the valley axis of the surface geostrophic wind was slightly larger than the orthogonal component. This suggests that the flow type cannot be explained using the surface geostrophic wind alone, irrespective of whether forced channelling or pressure‐driven channelling is dominant. |
| first_indexed | 2024-03-13T03:35:03Z |
| format | Article |
| id | doaj.art-0d160a612f8447de8e4bd54a7b08a0cb |
| institution | Directory Open Access Journal |
| issn | 1350-4827 1469-8080 |
| language | English |
| last_indexed | 2024-03-13T03:35:03Z |
| publishDate | 2022-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Meteorological Applications |
| spelling | doaj.art-0d160a612f8447de8e4bd54a7b08a0cb2023-06-23T21:00:32ZengWileyMeteorological Applications1350-48271469-80802022-07-01294n/an/a10.1002/met.2082Climatological study of airflow channelling in relation to surface geostrophic windRyogo Sato0Hiroyuki Kusaka1Graduate School of Life and Environmental Sciences University of Tsukuba Tsukuba Ibaraki JapanGraduate School of Life and Environmental Sciences University of Tsukuba Tsukuba Ibaraki JapanAbstract The aim of this study was to climatologically investigate forced and pressure‐driven channelling flow in the Kitakami Basin, Japan, through the use of observational surface wind and sea‐level pressure data collected over 23 years, which corresponded to 15,584 channelling flow events. Our results indicated that forced channelling tends to occur when the direction of the surface geostrophic wind is parallel to the valley axis. Contrastingly, pressure‐driven channelling tends to occur when the component perpendicular to the valley axis of the surface geostrophic wind is larger than that parallel to the valley axis of the surface geostrophic wind. The channelling flow type was determined by the wind direction of the surface geostrophic wind, which was more pronounced when the mountain Froude number of the flow across the valley was less than 1. This indicates that the type of channelling flow depends on the surface geostrophic wind speed. Moreover, neither channelling flow type was dominant when the component parallel to the valley axis of the surface geostrophic wind was slightly larger than the orthogonal component. This suggests that the flow type cannot be explained using the surface geostrophic wind alone, irrespective of whether forced channelling or pressure‐driven channelling is dominant.https://doi.org/10.1002/met.2082channelling flowclimatologyforced channellinglocal windsmountain meteorologypressure‐driven channelling |
| spellingShingle | Ryogo Sato Hiroyuki Kusaka Climatological study of airflow channelling in relation to surface geostrophic wind Meteorological Applications channelling flow climatology forced channelling local winds mountain meteorology pressure‐driven channelling |
| title | Climatological study of airflow channelling in relation to surface geostrophic wind |
| title_full | Climatological study of airflow channelling in relation to surface geostrophic wind |
| title_fullStr | Climatological study of airflow channelling in relation to surface geostrophic wind |
| title_full_unstemmed | Climatological study of airflow channelling in relation to surface geostrophic wind |
| title_short | Climatological study of airflow channelling in relation to surface geostrophic wind |
| title_sort | climatological study of airflow channelling in relation to surface geostrophic wind |
| topic | channelling flow climatology forced channelling local winds mountain meteorology pressure‐driven channelling |
| url | https://doi.org/10.1002/met.2082 |
| work_keys_str_mv | AT ryogosato climatologicalstudyofairflowchannellinginrelationtosurfacegeostrophicwind AT hiroyukikusaka climatologicalstudyofairflowchannellinginrelationtosurfacegeostrophicwind |