Identifying potential precursors to anomalous precipitation over Inter-America
Simultaneous and precursory signals in sea surface temperature (SST) associated with anomalous precipitation over North, Central and South America are examined with seasonal mean data. The relationships are documented for SST variations in three regions: the equatorial Pacific (NIĂO3), the tropical...
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ftdatacite:10.5065/57xx-4y82 2023-05-15T17:34:23+02:00 Identifying potential precursors to anomalous precipitation over Inter-America Church, Andrew Hurrell, James Gettelman, Andrew 2001 https://dx.doi.org/10.5065/57xx-4y82 https://opensky.ucar.edu/islandora/object/manuscripts:546 unknown University Corporation For Atmospheric Research (UCAR) Sea surface temperature Seasonal mean data Increased rainfall Nordeste Decreased precipitation Subtropical plains manuscript Text article-journal ScholarlyArticle 2001 ftdatacite https://doi.org/10.5065/57xx-4y82 2021-11-05T12:55:41Z Simultaneous and precursory signals in sea surface temperature (SST) associated with anomalous precipitation over North, Central and South America are examined with seasonal mean data. The relationships are documented for SST variations in three regions: the equatorial Pacific (NIĂO3), the tropical North Atlantic (NATL), and the tropical South Atlantic (SATL). These area definitions are based on the distributions of variance explained by the leading modes of SST variability in each ocean basin. The analyses reveal that when SSTs are warmer than average in the NIĂO3 region, increased rainfall in the Caribbean Islands and southern Central America occurs. Precipitation also increases over the central US while it decreases over portions of Columbia, Venezuela, Guyana, Suriname, and French Guiana as well as the Nordeste region of South America. When NATL SSTs are warmer than average, large areas of the north central US as well as northeast Brazil experience decreased precipitation. When changes in SATL SSTs are considered, positive correlations with precipitation over the Nordeste and subtropical plains regions of South America are highly significant. Several long-lead relationships between SST and anomalous precipitation are identified. Changes in NINO3 SST during boreal summer are significantly correlated with rainfall anomalies over northern South America and southern North America six months later. Similarly, changes in both NATL and SATL SSTs are found to precede inter-American precipitation anomalies by six to nine months. Text North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Nordeste ENVELOPE(-66.867,-66.867,-68.167,-68.167) Pacific |
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Sea surface temperature Seasonal mean data Increased rainfall Nordeste Decreased precipitation Subtropical plains |
spellingShingle |
Sea surface temperature Seasonal mean data Increased rainfall Nordeste Decreased precipitation Subtropical plains Church, Andrew Hurrell, James Gettelman, Andrew Identifying potential precursors to anomalous precipitation over Inter-America |
topic_facet |
Sea surface temperature Seasonal mean data Increased rainfall Nordeste Decreased precipitation Subtropical plains |
description |
Simultaneous and precursory signals in sea surface temperature (SST) associated with anomalous precipitation over North, Central and South America are examined with seasonal mean data. The relationships are documented for SST variations in three regions: the equatorial Pacific (NIĂO3), the tropical North Atlantic (NATL), and the tropical South Atlantic (SATL). These area definitions are based on the distributions of variance explained by the leading modes of SST variability in each ocean basin. The analyses reveal that when SSTs are warmer than average in the NIĂO3 region, increased rainfall in the Caribbean Islands and southern Central America occurs. Precipitation also increases over the central US while it decreases over portions of Columbia, Venezuela, Guyana, Suriname, and French Guiana as well as the Nordeste region of South America. When NATL SSTs are warmer than average, large areas of the north central US as well as northeast Brazil experience decreased precipitation. When changes in SATL SSTs are considered, positive correlations with precipitation over the Nordeste and subtropical plains regions of South America are highly significant. Several long-lead relationships between SST and anomalous precipitation are identified. Changes in NINO3 SST during boreal summer are significantly correlated with rainfall anomalies over northern South America and southern North America six months later. Similarly, changes in both NATL and SATL SSTs are found to precede inter-American precipitation anomalies by six to nine months. |
format |
Text |
author |
Church, Andrew Hurrell, James Gettelman, Andrew |
author_facet |
Church, Andrew Hurrell, James Gettelman, Andrew |
author_sort |
Church, Andrew |
title |
Identifying potential precursors to anomalous precipitation over Inter-America |
title_short |
Identifying potential precursors to anomalous precipitation over Inter-America |
title_full |
Identifying potential precursors to anomalous precipitation over Inter-America |
title_fullStr |
Identifying potential precursors to anomalous precipitation over Inter-America |
title_full_unstemmed |
Identifying potential precursors to anomalous precipitation over Inter-America |
title_sort |
identifying potential precursors to anomalous precipitation over inter-america |
publisher |
University Corporation For Atmospheric Research (UCAR) |
publishDate |
2001 |
url |
https://dx.doi.org/10.5065/57xx-4y82 https://opensky.ucar.edu/islandora/object/manuscripts:546 |
long_lat |
ENVELOPE(-66.867,-66.867,-68.167,-68.167) |
geographic |
Nordeste Pacific |
geographic_facet |
Nordeste Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_doi |
https://doi.org/10.5065/57xx-4y82 |
_version_ |
1766133191875231744 |