Atmospheric river lifecycle characteristics shaped by synoptic conditions at genesis
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—t...
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2021
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ftcdlib:oai:escholarship.org/ark:/13030/qt5mp5v5sn 2023-05-15T15:06:25+02:00 Atmospheric river lifecycle characteristics shaped by synoptic conditions at genesis Kim, S Chiang, JCH 2021-01-01 application/pdf https://escholarship.org/uc/item/5mp5v5sn unknown eScholarship, University of California qt5mp5v5sn https://escholarship.org/uc/item/5mp5v5sn public atmospheric rivers genesis self-organizing maps Atmospheric Sciences Civil Engineering Environmental Engineering Meteorology & Atmospheric Sciences article 2021 ftcdlib 2021-08-09T17:10:46Z 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 University of California: eScholarship Arctic Pacific |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
atmospheric rivers genesis self-organizing maps Atmospheric Sciences Civil Engineering Environmental Engineering Meteorology & Atmospheric Sciences |
spellingShingle |
atmospheric rivers genesis self-organizing maps Atmospheric Sciences Civil Engineering Environmental Engineering Meteorology & Atmospheric Sciences Kim, S Chiang, JCH Atmospheric river lifecycle characteristics shaped by synoptic conditions at genesis |
topic_facet |
atmospheric rivers genesis self-organizing maps Atmospheric Sciences Civil Engineering Environmental Engineering Meteorology & Atmospheric Sciences |
description |
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, S Chiang, JCH |
author_facet |
Kim, S Chiang, JCH |
author_sort |
Kim, S |
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 |
eScholarship, University of California |
publishDate |
2021 |
url |
https://escholarship.org/uc/item/5mp5v5sn |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
qt5mp5v5sn https://escholarship.org/uc/item/5mp5v5sn |
op_rights |
public |
_version_ |
1766338023668056064 |