Weather types across the Caribbean basin and their relationship with rainfall and sea surface temperature
International audience Eight weather types (WTs) are computed over 98.75 degrees W-56.25 degrees W, 8.75 degrees N-31.25 degrees N using cluster analysis of daily low-level (925 hPa) winds and outgoing long-wave radiation, without removing the mean annual cycle, by a k-means algorithm from 1979 to 2...
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Online Access: | https://hal.science/hal-01765466 https://doi.org/10.1007/s00382-015-2858-9 |
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ftinsu:oai:HAL:hal-01765466v1 2023-12-17T10:47:04+01:00 Weather types across the Caribbean basin and their relationship with rainfall and sea surface temperature Moron, Vincent Gouirand, Isabelle Taylor, Michael Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2016 https://hal.science/hal-01765466 https://doi.org/10.1007/s00382-015-2858-9 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-015-2858-9 hal-01765466 https://hal.science/hal-01765466 doi:10.1007/s00382-015-2858-9 ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.science/hal-01765466 Climate Dynamics, 2016, 47 (1-2), pp.601-621. ⟨10.1007/s00382-015-2858-9⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2016 ftinsu https://doi.org/10.1007/s00382-015-2858-9 2023-11-22T17:47:48Z International audience Eight weather types (WTs) are computed over 98.75 degrees W-56.25 degrees W, 8.75 degrees N-31.25 degrees N using cluster analysis of daily low-level (925 hPa) winds and outgoing long-wave radiation, without removing the mean annual cycle, by a k-means algorithm from 1979 to 2013. The WTs can be firstly interpreted as snapshots of the annual cycle with a clear distinction between 5 ``wintertime'' and 3 ``summertime'' WTs, which account together for 70 % of the total mean annual rainfall across the studied domain. The wintertime WTs occur mostly from late November to late April and are characterized by varying intensity and location of the North Atlantic subtropical high (NASH) and transient synoptic troughs along the northern edge of the domain. Large-scale subsidence dominates the whole basin but rainfall can occur over sections of the basin, especially on the windward shores of the troughs associated with the synoptic waves. The transition between wintertime and summertime WTs is rather abrupt, especially in May. One summertime WT (WT 4) is prevalent in summer, and almost exclusive around late July. It is characterized by strong NASH, fast Caribbean low level jet and rainfall mostly concentrated over the Caribbean Islands, the Florida Peninsula, the whole Central America and the tropical Eastern Pacific. The two remaining summertime WTs display widespread rainfall respectively from Central America to Bermuda (WT 5) and over the Eastern Caribbean (WT 6). Both WTs combine reduced regional scale subsidence and weaker Caribbean low-level jet relatively to WT 4. The relationships between WT frequency and El Nino Southern Oscillation (ENSO) events are broadly linear. Warm central and eastern ENSO events are associated with more WT 4 (less WT 5-6) during boreal summer and autumn (0) while this relationship is reversed during boreal summer (+1) for central events only. In boreal winter, the largest anomalies are observed for two WTs consistent with negative (WT 2) and positive (WT 8) phases of ... Article in Journal/Newspaper North Atlantic Institut national des sciences de l'Univers: HAL-INSU Nash ENVELOPE(-62.350,-62.350,-74.233,-74.233) Pacific Climate Dynamics 47 1-2 601 621 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Moron, Vincent Gouirand, Isabelle Taylor, Michael Weather types across the Caribbean basin and their relationship with rainfall and sea surface temperature |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Eight weather types (WTs) are computed over 98.75 degrees W-56.25 degrees W, 8.75 degrees N-31.25 degrees N using cluster analysis of daily low-level (925 hPa) winds and outgoing long-wave radiation, without removing the mean annual cycle, by a k-means algorithm from 1979 to 2013. The WTs can be firstly interpreted as snapshots of the annual cycle with a clear distinction between 5 ``wintertime'' and 3 ``summertime'' WTs, which account together for 70 % of the total mean annual rainfall across the studied domain. The wintertime WTs occur mostly from late November to late April and are characterized by varying intensity and location of the North Atlantic subtropical high (NASH) and transient synoptic troughs along the northern edge of the domain. Large-scale subsidence dominates the whole basin but rainfall can occur over sections of the basin, especially on the windward shores of the troughs associated with the synoptic waves. The transition between wintertime and summertime WTs is rather abrupt, especially in May. One summertime WT (WT 4) is prevalent in summer, and almost exclusive around late July. It is characterized by strong NASH, fast Caribbean low level jet and rainfall mostly concentrated over the Caribbean Islands, the Florida Peninsula, the whole Central America and the tropical Eastern Pacific. The two remaining summertime WTs display widespread rainfall respectively from Central America to Bermuda (WT 5) and over the Eastern Caribbean (WT 6). Both WTs combine reduced regional scale subsidence and weaker Caribbean low-level jet relatively to WT 4. The relationships between WT frequency and El Nino Southern Oscillation (ENSO) events are broadly linear. Warm central and eastern ENSO events are associated with more WT 4 (less WT 5-6) during boreal summer and autumn (0) while this relationship is reversed during boreal summer (+1) for central events only. In boreal winter, the largest anomalies are observed for two WTs consistent with negative (WT 2) and positive (WT 8) phases of ... |
author2 |
Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Moron, Vincent Gouirand, Isabelle Taylor, Michael |
author_facet |
Moron, Vincent Gouirand, Isabelle Taylor, Michael |
author_sort |
Moron, Vincent |
title |
Weather types across the Caribbean basin and their relationship with rainfall and sea surface temperature |
title_short |
Weather types across the Caribbean basin and their relationship with rainfall and sea surface temperature |
title_full |
Weather types across the Caribbean basin and their relationship with rainfall and sea surface temperature |
title_fullStr |
Weather types across the Caribbean basin and their relationship with rainfall and sea surface temperature |
title_full_unstemmed |
Weather types across the Caribbean basin and their relationship with rainfall and sea surface temperature |
title_sort |
weather types across the caribbean basin and their relationship with rainfall and sea surface temperature |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-01765466 https://doi.org/10.1007/s00382-015-2858-9 |
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 |
ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.science/hal-01765466 Climate Dynamics, 2016, 47 (1-2), pp.601-621. ⟨10.1007/s00382-015-2858-9⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-015-2858-9 hal-01765466 https://hal.science/hal-01765466 doi:10.1007/s00382-015-2858-9 |
op_doi |
https://doi.org/10.1007/s00382-015-2858-9 |
container_title |
Climate Dynamics |
container_volume |
47 |
container_issue |
1-2 |
container_start_page |
601 |
op_container_end_page |
621 |
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1785570812174008320 |