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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ftdoajarticles:oai:doaj.org/article:9b224fc151d7439d8974d5838498b40b 2023-05-15T17:34:06+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 2020-07-01T00:00:00Z https://doi.org/10.3390/atmos11070745 https://doaj.org/article/9b224fc151d7439d8974d5838498b40b EN eng MDPI AG https://www.mdpi.com/2073-4433/11/7/745 https://doaj.org/toc/2073-4433 doi:10.3390/atmos11070745 2073-4433 https://doaj.org/article/9b224fc151d7439d8974d5838498b40b Atmosphere, Vol 11, Iss 745, p 745 (2020) synoptic climatology self-organizing maps weather types Meteorology. Climatology QC851-999 article 2020 ftdoajarticles https://doi.org/10.3390/atmos11070745 2022-12-31T13:47:49Z 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. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Nash ENVELOPE(-62.350,-62.350,-74.233,-74.233) Pacific Atmosphere 11 7 745 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
synoptic climatology self-organizing maps weather types Meteorology. Climatology QC851-999 |
spellingShingle |
synoptic climatology self-organizing maps weather types Meteorology. Climatology QC851-999 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 Meteorology. Climatology QC851-999 |
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 |
Article in Journal/Newspaper |
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 |
MDPI AG |
publishDate |
2020 |
url |
https://doi.org/10.3390/atmos11070745 https://doaj.org/article/9b224fc151d7439d8974d5838498b40b |
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, Vol 11, Iss 745, p 745 (2020) |
op_relation |
https://www.mdpi.com/2073-4433/11/7/745 https://doaj.org/toc/2073-4433 doi:10.3390/atmos11070745 2073-4433 https://doaj.org/article/9b224fc151d7439d8974d5838498b40b |
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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1766132824096636928 |