Climatological Large-Scale Circulation Patterns over The Middle Americas Region
In this study, twenty large-scale circulation patterns are identified to generate a synoptic classification of Weather Types (WT) over a region that comprises Mexico, the Intra-Americas Seas, Central America, and northern South America. This classification is performed using Self-Organizing Maps (SO...
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ftmdpi:oai:mdpi.com:/2073-4433/11/7/745/ 2023-08-20T04:08:25+02:00 Climatological Large-Scale Circulation Patterns over The Middle Americas Region Carlos A. Ochoa-Moya Yoel A. Cala-Pérez Yanet Díaz-Esteban Christopher L. Castro Paulina Ordoñez-Peréz Arturo I. Quintanar agris 2020-07-14 application/pdf https://doi.org/10.3390/atmos11070745 EN eng Multidisciplinary Digital Publishing Institute Biosphere/Hydrosphere/Land–Atmosphere Interactions https://dx.doi.org/10.3390/atmos11070745 https://creativecommons.org/licenses/by/4.0/ Atmosphere; Volume 11; Issue 7; Pages: 745 synoptic climatology self-organizing maps weather types Text 2020 ftmdpi https://doi.org/10.3390/atmos11070745 2023-07-31T23:46:19Z In this study, twenty large-scale circulation patterns are identified to generate a synoptic classification of Weather Types (WT) over a region that comprises Mexico, the Intra-Americas Seas, Central America, and northern South America. This classification is performed using Self-Organizing Maps (SOMs) with mean sea-level pressure standardized anomalies from reanalysis. The influence of quasi-permanent pressure centers over the region, such as North Atlantic Subtropical High (NASH) and North Pacific High (NPH) are well captured. Seasonal variability of high-pressure centers for dry (November–April) and wet (May–October) periods over the entire region are also well represented in amplitude and pattern among the WTs. The NASH influence and intensification of the Caribbean low-level jet and the North American monsoon system is well captured. During the dry period, a strong trough wind advects cold air masses from mid-latitudes to the subtropics over the western Atlantic Ocean. High-frequency transitions among WTs tend to cluster around the nearest neighbors in SOM space, while low-frequency transitions occur along columns instead of rows in the SOM matrix. Low-frequency transitions are related to intraseasonal and seasonal scales. The constructed catalog can identify near-surface atmospheric circulation patterns from a unified perspective of synoptic climate variability, and it is in high agreement with previous studies for the region. Text North Atlantic MDPI Open Access Publishing Nash ENVELOPE(-62.350,-62.350,-74.233,-74.233) Pacific Atmosphere 11 7 745 |
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Open Polar |
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MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
synoptic climatology self-organizing maps weather types |
spellingShingle |
synoptic climatology self-organizing maps weather types Carlos A. Ochoa-Moya Yoel A. Cala-Pérez Yanet Díaz-Esteban Christopher L. Castro Paulina Ordoñez-Peréz Arturo I. Quintanar Climatological Large-Scale Circulation Patterns over The Middle Americas Region |
topic_facet |
synoptic climatology self-organizing maps weather types |
description |
In this study, twenty large-scale circulation patterns are identified to generate a synoptic classification of Weather Types (WT) over a region that comprises Mexico, the Intra-Americas Seas, Central America, and northern South America. This classification is performed using Self-Organizing Maps (SOMs) with mean sea-level pressure standardized anomalies from reanalysis. The influence of quasi-permanent pressure centers over the region, such as North Atlantic Subtropical High (NASH) and North Pacific High (NPH) are well captured. Seasonal variability of high-pressure centers for dry (November–April) and wet (May–October) periods over the entire region are also well represented in amplitude and pattern among the WTs. The NASH influence and intensification of the Caribbean low-level jet and the North American monsoon system is well captured. During the dry period, a strong trough wind advects cold air masses from mid-latitudes to the subtropics over the western Atlantic Ocean. High-frequency transitions among WTs tend to cluster around the nearest neighbors in SOM space, while low-frequency transitions occur along columns instead of rows in the SOM matrix. Low-frequency transitions are related to intraseasonal and seasonal scales. The constructed catalog can identify near-surface atmospheric circulation patterns from a unified perspective of synoptic climate variability, and it is in high agreement with previous studies for the region. |
format |
Text |
author |
Carlos A. Ochoa-Moya Yoel A. Cala-Pérez Yanet Díaz-Esteban Christopher L. Castro Paulina Ordoñez-Peréz Arturo I. Quintanar |
author_facet |
Carlos A. Ochoa-Moya Yoel A. Cala-Pérez Yanet Díaz-Esteban Christopher L. Castro Paulina Ordoñez-Peréz Arturo I. Quintanar |
author_sort |
Carlos A. Ochoa-Moya |
title |
Climatological Large-Scale Circulation Patterns over The Middle Americas Region |
title_short |
Climatological Large-Scale Circulation Patterns over The Middle Americas Region |
title_full |
Climatological Large-Scale Circulation Patterns over The Middle Americas Region |
title_fullStr |
Climatological Large-Scale Circulation Patterns over The Middle Americas Region |
title_full_unstemmed |
Climatological Large-Scale Circulation Patterns over The Middle Americas Region |
title_sort |
climatological large-scale circulation patterns over the middle americas region |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2020 |
url |
https://doi.org/10.3390/atmos11070745 |
op_coverage |
agris |
long_lat |
ENVELOPE(-62.350,-62.350,-74.233,-74.233) |
geographic |
Nash Pacific |
geographic_facet |
Nash Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Atmosphere; Volume 11; Issue 7; Pages: 745 |
op_relation |
Biosphere/Hydrosphere/Land–Atmosphere Interactions https://dx.doi.org/10.3390/atmos11070745 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/atmos11070745 |
container_title |
Atmosphere |
container_volume |
11 |
container_issue |
7 |
container_start_page |
745 |
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1774720666940997632 |