3509 NOTES AND CORRESPONDENCE U.S. East Coast Trough Indices at 500 hPa and New England Winter Climate Variability
ABSTRACT Using monthly gridded 500-hPa data, two synoptic indices are defined to better understand the principle mechanisms controlling intraseasonal to multiannual winter climate variability in New England (NE). The ''trough axis index'' (TAI) is created to quantify the mean lon...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1071.9520 2023-05-15T17:30:38+02:00 3509 NOTES AND CORRESPONDENCE U.S. East Coast Trough Indices at 500 hPa and New England Winter Climate Variability James A Bradbury Barry D Keim Cameron P Wake The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1071.9520 http://www.geo.umass.edu/gradstud/jbradbury/jclimate.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1071.9520 http://www.geo.umass.edu/gradstud/jbradbury/jclimate.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.geo.umass.edu/gradstud/jbradbury/jclimate.pdf text ftciteseerx 2020-04-26T00:23:27Z ABSTRACT Using monthly gridded 500-hPa data, two synoptic indices are defined to better understand the principle mechanisms controlling intraseasonal to multiannual winter climate variability in New England (NE). The ''trough axis index'' (TAI) is created to quantify the mean longitudinal position of the common East Coast pressure trough, and the ''trough intensity index'' (TII) is calculated to estimate the relative amplitude of this trough at 42.5ЊN. The TAI and TII are then compared with records for NE regional winter precipitation, temperature, and snowfall with the goal of understanding physical mechanisms linking NE winter climate with regional sea surface temperatures (SST), the North Atlantic Oscillation (NAO), and the Pacific-North American (PNA) teleconnection pattern. The TAI correlates most significantly with winter precipitation at inland sites, such that a western (eastern) trough axis position is associated with greater (lower) average monthly precipitation. Also, significant correlations between the TAI and both NE regional SSTs and the NAO suggest that longitudinal shifting of the trough is one possible mechanism linking the North Atlantic with NE regional winter climate variability. The NE winter temperature is significantly correlated with the TII, regional SSTs, and the NAO. While the PNA also correlates with the TII, NE winter climate variables are apparently unrelated to the PNA index. Text North Atlantic North Atlantic oscillation Unknown Pacific |
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English |
description |
ABSTRACT Using monthly gridded 500-hPa data, two synoptic indices are defined to better understand the principle mechanisms controlling intraseasonal to multiannual winter climate variability in New England (NE). The ''trough axis index'' (TAI) is created to quantify the mean longitudinal position of the common East Coast pressure trough, and the ''trough intensity index'' (TII) is calculated to estimate the relative amplitude of this trough at 42.5ЊN. The TAI and TII are then compared with records for NE regional winter precipitation, temperature, and snowfall with the goal of understanding physical mechanisms linking NE winter climate with regional sea surface temperatures (SST), the North Atlantic Oscillation (NAO), and the Pacific-North American (PNA) teleconnection pattern. The TAI correlates most significantly with winter precipitation at inland sites, such that a western (eastern) trough axis position is associated with greater (lower) average monthly precipitation. Also, significant correlations between the TAI and both NE regional SSTs and the NAO suggest that longitudinal shifting of the trough is one possible mechanism linking the North Atlantic with NE regional winter climate variability. The NE winter temperature is significantly correlated with the TII, regional SSTs, and the NAO. While the PNA also correlates with the TII, NE winter climate variables are apparently unrelated to the PNA index. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
James A Bradbury Barry D Keim Cameron P Wake |
spellingShingle |
James A Bradbury Barry D Keim Cameron P Wake 3509 NOTES AND CORRESPONDENCE U.S. East Coast Trough Indices at 500 hPa and New England Winter Climate Variability |
author_facet |
James A Bradbury Barry D Keim Cameron P Wake |
author_sort |
James A Bradbury |
title |
3509 NOTES AND CORRESPONDENCE U.S. East Coast Trough Indices at 500 hPa and New England Winter Climate Variability |
title_short |
3509 NOTES AND CORRESPONDENCE U.S. East Coast Trough Indices at 500 hPa and New England Winter Climate Variability |
title_full |
3509 NOTES AND CORRESPONDENCE U.S. East Coast Trough Indices at 500 hPa and New England Winter Climate Variability |
title_fullStr |
3509 NOTES AND CORRESPONDENCE U.S. East Coast Trough Indices at 500 hPa and New England Winter Climate Variability |
title_full_unstemmed |
3509 NOTES AND CORRESPONDENCE U.S. East Coast Trough Indices at 500 hPa and New England Winter Climate Variability |
title_sort |
3509 notes and correspondence u.s. east coast trough indices at 500 hpa and new england winter climate variability |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1071.9520 http://www.geo.umass.edu/gradstud/jbradbury/jclimate.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
http://www.geo.umass.edu/gradstud/jbradbury/jclimate.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1071.9520 http://www.geo.umass.edu/gradstud/jbradbury/jclimate.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766127491060072448 |