Submitted to the Journal of Climate for consideration in the US CLIVAR Drought Working Group Special Issue.
The dynamical mechanisms associated with year-to-year variability in tropical North Atlantic (TNA) sea surface temperatures (SSTs) during the cold and warm half of the hydrological year (October-September) are examined. Observations indicate that during both seasons warmer than normal TNA SSTs are a...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.188.6942 2023-05-15T17:34:16+02:00 Submitted to the Journal of Climate for consideration in the US CLIVAR Drought Working Group Special Issue. Yochanan Kushnir Richard Seager Mingfang Ting Naomi Naik Jennifer Nakamura The Pennsylvania State University CiteSeerX Archives 2009 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.188.6942 http://www.ldeo.columbia.edu/res/div/ocp/pub/kushnir/Kushnir_etal-Atlantic_Drought.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.188.6942 http://www.ldeo.columbia.edu/res/div/ocp/pub/kushnir/Kushnir_etal-Atlantic_Drought.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.ldeo.columbia.edu/res/div/ocp/pub/kushnir/Kushnir_etal-Atlantic_Drought.pdf text 2009 ftciteseerx 2016-01-07T16:47:21Z The dynamical mechanisms associated with year-to-year variability in tropical North Atlantic (TNA) sea surface temperatures (SSTs) during the cold and warm half of the hydrological year (October-September) are examined. Observations indicate that during both seasons warmer than normal TNA SSTs are associated with a reduction of precipitation over the North America, west of about 90°W and that that effect can be up to 30 % of the year-to-year seasonal precipitation RMS variability. This finding confirms earlier studies with observations and models. While not as large as the seasonal effects of ENSO during the cold season, the Atlantic impact, per one standard deviation of TNA SSTs, is larger than that of the former during the warm season. When the observed association between TNA SST anomalies and global and regional (North American) precipitation and sea level pressure variability are compared with the output from an atmospheric general circulation model (AGCM) forced with observed SSTs, we find that the SST variability can be viewed as the cause for circulation and rainfall variability. The mechanism of the upstream influence on the American West is seasonally dependent, as confirmed by a set of experiments with a linear general circulation model forced with the tropical heating field derived from the full AGCM response. In the warm half of the year, the SST-induced increase in TNA Text North Atlantic Unknown |
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Open Polar |
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ftciteseerx |
language |
English |
description |
The dynamical mechanisms associated with year-to-year variability in tropical North Atlantic (TNA) sea surface temperatures (SSTs) during the cold and warm half of the hydrological year (October-September) are examined. Observations indicate that during both seasons warmer than normal TNA SSTs are associated with a reduction of precipitation over the North America, west of about 90°W and that that effect can be up to 30 % of the year-to-year seasonal precipitation RMS variability. This finding confirms earlier studies with observations and models. While not as large as the seasonal effects of ENSO during the cold season, the Atlantic impact, per one standard deviation of TNA SSTs, is larger than that of the former during the warm season. When the observed association between TNA SST anomalies and global and regional (North American) precipitation and sea level pressure variability are compared with the output from an atmospheric general circulation model (AGCM) forced with observed SSTs, we find that the SST variability can be viewed as the cause for circulation and rainfall variability. The mechanism of the upstream influence on the American West is seasonally dependent, as confirmed by a set of experiments with a linear general circulation model forced with the tropical heating field derived from the full AGCM response. In the warm half of the year, the SST-induced increase in TNA |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Yochanan Kushnir Richard Seager Mingfang Ting Naomi Naik Jennifer Nakamura |
spellingShingle |
Yochanan Kushnir Richard Seager Mingfang Ting Naomi Naik Jennifer Nakamura Submitted to the Journal of Climate for consideration in the US CLIVAR Drought Working Group Special Issue. |
author_facet |
Yochanan Kushnir Richard Seager Mingfang Ting Naomi Naik Jennifer Nakamura |
author_sort |
Yochanan Kushnir |
title |
Submitted to the Journal of Climate for consideration in the US CLIVAR Drought Working Group Special Issue. |
title_short |
Submitted to the Journal of Climate for consideration in the US CLIVAR Drought Working Group Special Issue. |
title_full |
Submitted to the Journal of Climate for consideration in the US CLIVAR Drought Working Group Special Issue. |
title_fullStr |
Submitted to the Journal of Climate for consideration in the US CLIVAR Drought Working Group Special Issue. |
title_full_unstemmed |
Submitted to the Journal of Climate for consideration in the US CLIVAR Drought Working Group Special Issue. |
title_sort |
submitted to the journal of climate for consideration in the us clivar drought working group special issue. |
publishDate |
2009 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.188.6942 http://www.ldeo.columbia.edu/res/div/ocp/pub/kushnir/Kushnir_etal-Atlantic_Drought.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
http://www.ldeo.columbia.edu/res/div/ocp/pub/kushnir/Kushnir_etal-Atlantic_Drought.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.188.6942 http://www.ldeo.columbia.edu/res/div/ocp/pub/kushnir/Kushnir_etal-Atlantic_Drought.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766133037360218112 |