2004: Seasonal and regional variation of Pan-Arctic surface air temperature over the instrumental record
Historical surface air temperature (SAT) records from 59 Arctic stations north of 64°N show monthly anomalies of several degrees and large spatial teleconnectivity yet major seasonal and regional differences, based on time/longitude plots of SAT anomalies and Principal Component Analysis (PCA). Usin...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.470.4035 2023-05-15T14:19:24+02:00 2004: Seasonal and regional variation of Pan-Arctic surface air temperature over the instrumental record James E. Overland Michael C. Spillane Donald B. Percival Harold O. Mofjeld The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.470.4035 http://faculty.washington.edu/dbp/PDFFILES/arctic-SATs.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.470.4035 http://faculty.washington.edu/dbp/PDFFILES/arctic-SATs.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://faculty.washington.edu/dbp/PDFFILES/arctic-SATs.pdf text ftciteseerx 2016-01-08T07:15:01Z Historical surface air temperature (SAT) records from 59 Arctic stations north of 64°N show monthly anomalies of several degrees and large spatial teleconnectivity yet major seasonal and regional differences, based on time/longitude plots of SAT anomalies and Principal Component Analysis (PCA). Using monthly station data rather than gridded fields for this analysis highlights the importance of considering record length in calculating reliable Arctic change estimates; for example, we contrast PCA performed on 11 stations beginning in 1886, 20 stations beginning in 1912, and 45 stations beginning in 1936. While often there is a well-known interdecadal negative covariability in winter between Scandinavia and Baffin Bay in the historical SATs, long-term changes in the remainder of the Arctic are most evident in spring, with cool temperatures before 1920 and Arctic-wide warming in the 1990s. Summer anomalies are generally weaker than spring or winter but tend to mirror spring conditions before 1920 and in recent decades. Temperature advection in the trough-ridge structure in the positive phase of the Arctic Oscillation (AO) in the N. Atlantic establishes wintertime temperature anomalies in adjacent regions, while the zonal/annular nature of the AO in the remainder of the Arctic must break down in spring to promote meridional temperature advection. There are regional/decadal Text Arctic Arctic Baffin Bay Baffin Bay Baffin Unknown Arctic Baffin Bay |
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ftciteseerx |
language |
English |
description |
Historical surface air temperature (SAT) records from 59 Arctic stations north of 64°N show monthly anomalies of several degrees and large spatial teleconnectivity yet major seasonal and regional differences, based on time/longitude plots of SAT anomalies and Principal Component Analysis (PCA). Using monthly station data rather than gridded fields for this analysis highlights the importance of considering record length in calculating reliable Arctic change estimates; for example, we contrast PCA performed on 11 stations beginning in 1886, 20 stations beginning in 1912, and 45 stations beginning in 1936. While often there is a well-known interdecadal negative covariability in winter between Scandinavia and Baffin Bay in the historical SATs, long-term changes in the remainder of the Arctic are most evident in spring, with cool temperatures before 1920 and Arctic-wide warming in the 1990s. Summer anomalies are generally weaker than spring or winter but tend to mirror spring conditions before 1920 and in recent decades. Temperature advection in the trough-ridge structure in the positive phase of the Arctic Oscillation (AO) in the N. Atlantic establishes wintertime temperature anomalies in adjacent regions, while the zonal/annular nature of the AO in the remainder of the Arctic must break down in spring to promote meridional temperature advection. There are regional/decadal |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
James E. Overland Michael C. Spillane Donald B. Percival Harold O. Mofjeld |
spellingShingle |
James E. Overland Michael C. Spillane Donald B. Percival Harold O. Mofjeld 2004: Seasonal and regional variation of Pan-Arctic surface air temperature over the instrumental record |
author_facet |
James E. Overland Michael C. Spillane Donald B. Percival Harold O. Mofjeld |
author_sort |
James E. Overland |
title |
2004: Seasonal and regional variation of Pan-Arctic surface air temperature over the instrumental record |
title_short |
2004: Seasonal and regional variation of Pan-Arctic surface air temperature over the instrumental record |
title_full |
2004: Seasonal and regional variation of Pan-Arctic surface air temperature over the instrumental record |
title_fullStr |
2004: Seasonal and regional variation of Pan-Arctic surface air temperature over the instrumental record |
title_full_unstemmed |
2004: Seasonal and regional variation of Pan-Arctic surface air temperature over the instrumental record |
title_sort |
2004: seasonal and regional variation of pan-arctic surface air temperature over the instrumental record |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.470.4035 http://faculty.washington.edu/dbp/PDFFILES/arctic-SATs.pdf |
geographic |
Arctic Baffin Bay |
geographic_facet |
Arctic Baffin Bay |
genre |
Arctic Arctic Baffin Bay Baffin Bay Baffin |
genre_facet |
Arctic Arctic Baffin Bay Baffin Bay Baffin |
op_source |
http://faculty.washington.edu/dbp/PDFFILES/arctic-SATs.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.470.4035 http://faculty.washington.edu/dbp/PDFFILES/arctic-SATs.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766291239053819904 |