Atmospheric river lifecycle characteristics shaped by synoptic conditions at genesis
Abstract The range of synoptic patterns that North Pacific landfalling atmospheric rivers form under are objectively identified using genesis day 500 hPa geopotential height anomalies in a self‐organizing map (SOM). The SOM arranges the synoptic patterns to differentiate between two groups of climat...
Published in: | International Journal of Climatology |
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crwiley:10.1002/joc.7258 2024-09-09T19:25:50+00:00 Atmospheric river lifecycle characteristics shaped by synoptic conditions at genesis Kim, Sol Chiang, John C. H. 2021 http://dx.doi.org/10.1002/joc.7258 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7258 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.7258 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7258 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor International Journal of Climatology volume 42, issue 1, page 521-538 ISSN 0899-8418 1097-0088 journal-article 2021 crwiley https://doi.org/10.1002/joc.7258 2024-08-06T04:19:04Z Abstract The range of synoptic patterns that North Pacific landfalling atmospheric rivers form under are objectively identified using genesis day 500 hPa geopotential height anomalies in a self‐organizing map (SOM). The SOM arranges the synoptic patterns to differentiate between two groups of climate modes—the first group with ENSO (El Niño Southern Oscillation), PDO (Pacific Decadal Oscillation), PNA (Pacific North American) and NP (North Pacific index) and the second group with AO (Arctic Oscillation), EPO (East Pacific Oscillation), and WPO (West Pacific Oscillation). These two groups have their positive and negative modes organized in opposite corners of the SOM. The ARs produced in each of the synoptic patterns have distinct lifecycle characteristics (such as genesis and landfall location, duration, velocity, meridional/zonal movement) and precipitation impacts (magnitude and spatial distribution). The conditions that favour AR trajectories closer to the tropics tend to produce higher amounts of precipitation. The large‐scale circulation associated with AR genesis shows a close relationship between the genesis location and the location and intensity of the upper‐level jet in the west/central pacific as well as anomalous, low‐level southwesterly winds in the east pacific. Article in Journal/Newspaper Arctic Wiley Online Library Arctic Pacific International Journal of Climatology 42 1 521 538 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The range of synoptic patterns that North Pacific landfalling atmospheric rivers form under are objectively identified using genesis day 500 hPa geopotential height anomalies in a self‐organizing map (SOM). The SOM arranges the synoptic patterns to differentiate between two groups of climate modes—the first group with ENSO (El Niño Southern Oscillation), PDO (Pacific Decadal Oscillation), PNA (Pacific North American) and NP (North Pacific index) and the second group with AO (Arctic Oscillation), EPO (East Pacific Oscillation), and WPO (West Pacific Oscillation). These two groups have their positive and negative modes organized in opposite corners of the SOM. The ARs produced in each of the synoptic patterns have distinct lifecycle characteristics (such as genesis and landfall location, duration, velocity, meridional/zonal movement) and precipitation impacts (magnitude and spatial distribution). The conditions that favour AR trajectories closer to the tropics tend to produce higher amounts of precipitation. The large‐scale circulation associated with AR genesis shows a close relationship between the genesis location and the location and intensity of the upper‐level jet in the west/central pacific as well as anomalous, low‐level southwesterly winds in the east pacific. |
format |
Article in Journal/Newspaper |
author |
Kim, Sol Chiang, John C. H. |
spellingShingle |
Kim, Sol Chiang, John C. H. Atmospheric river lifecycle characteristics shaped by synoptic conditions at genesis |
author_facet |
Kim, Sol Chiang, John C. H. |
author_sort |
Kim, Sol |
title |
Atmospheric river lifecycle characteristics shaped by synoptic conditions at genesis |
title_short |
Atmospheric river lifecycle characteristics shaped by synoptic conditions at genesis |
title_full |
Atmospheric river lifecycle characteristics shaped by synoptic conditions at genesis |
title_fullStr |
Atmospheric river lifecycle characteristics shaped by synoptic conditions at genesis |
title_full_unstemmed |
Atmospheric river lifecycle characteristics shaped by synoptic conditions at genesis |
title_sort |
atmospheric river lifecycle characteristics shaped by synoptic conditions at genesis |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/joc.7258 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7258 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.7258 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7258 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
International Journal of Climatology volume 42, issue 1, page 521-538 ISSN 0899-8418 1097-0088 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/joc.7258 |
container_title |
International Journal of Climatology |
container_volume |
42 |
container_issue |
1 |
container_start_page |
521 |
op_container_end_page |
538 |
_version_ |
1809895554135621632 |