Variability and trends of air temperature and pressure
Arctic atmospheric variability during the industrial era (1875–2000) is assessed using spatially averaged surface air temperature (SAT) and sea level pressure (SLP) records. Air temperature and pressure display strong mul-tidecadal variability on timescales of 50–80 yr [termed low-frequency oscillat...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.473.7364 2023-05-15T14:33:50+02:00 Variability and trends of air temperature and pressure Igor V. Polyakov Roman V. Bekryaev Genrikh V. Alekseev Uma S. Bhatt Roger L. Colony Mark A. Johnson Alexander P. Maskshtas David Walsh The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.473.7364 http://www.personal.kent.edu/~jortiz/paleoceanography/warm_apr02.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.473.7364 http://www.personal.kent.edu/~jortiz/paleoceanography/warm_apr02.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.personal.kent.edu/~jortiz/paleoceanography/warm_apr02.pdf text 2003 ftciteseerx 2016-01-08T07:27:05Z Arctic atmospheric variability during the industrial era (1875–2000) is assessed using spatially averaged surface air temperature (SAT) and sea level pressure (SLP) records. Air temperature and pressure display strong mul-tidecadal variability on timescales of 50–80 yr [termed low-frequency oscillation (LFO)]. Associated with this variability, the Arctic SAT record shows two maxima: in the 1930s–40s and in recent decades, with two colder periods in between. In contrast to the global and hemispheric temperature, the maritime Arctic temperature was higher in the late 1930s through the early 1940s than in the 1990s. Incomplete sampling of large-amplitude multidecadal fluctuations results in oscillatory Arctic SAT trends. For example, the Arctic SAT trend since 1875 is 0.09 6 0.038C decade21, with stronger spring- and wintertime warming; during the twentieth century (when positive and negative phases of the LFO nearly offset each other) the Arctic temperature increase is 0.05 6 0.048C decade21, similar to the Northern Hemispheric trend (0.068C decade21). Thus, the large-amplitude mul-tidecadal climate variability impacting the maritime Arctic may confound the detection of the true underlying climate trend over the past century. LFO-modulated trends for short records are not indicative of the long-term behavior of the Arctic climate system. The accelerated warming and a shift of the atmospheric pressure pattern from anticyclonic to cyclonic in recent decades can be attributed to a positive LFO phase. It is speculated that Text Arctic Unknown Arctic |
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description |
Arctic atmospheric variability during the industrial era (1875–2000) is assessed using spatially averaged surface air temperature (SAT) and sea level pressure (SLP) records. Air temperature and pressure display strong mul-tidecadal variability on timescales of 50–80 yr [termed low-frequency oscillation (LFO)]. Associated with this variability, the Arctic SAT record shows two maxima: in the 1930s–40s and in recent decades, with two colder periods in between. In contrast to the global and hemispheric temperature, the maritime Arctic temperature was higher in the late 1930s through the early 1940s than in the 1990s. Incomplete sampling of large-amplitude multidecadal fluctuations results in oscillatory Arctic SAT trends. For example, the Arctic SAT trend since 1875 is 0.09 6 0.038C decade21, with stronger spring- and wintertime warming; during the twentieth century (when positive and negative phases of the LFO nearly offset each other) the Arctic temperature increase is 0.05 6 0.048C decade21, similar to the Northern Hemispheric trend (0.068C decade21). Thus, the large-amplitude mul-tidecadal climate variability impacting the maritime Arctic may confound the detection of the true underlying climate trend over the past century. LFO-modulated trends for short records are not indicative of the long-term behavior of the Arctic climate system. The accelerated warming and a shift of the atmospheric pressure pattern from anticyclonic to cyclonic in recent decades can be attributed to a positive LFO phase. It is speculated that |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Igor V. Polyakov Roman V. Bekryaev Genrikh V. Alekseev Uma S. Bhatt Roger L. Colony Mark A. Johnson Alexander P. Maskshtas David Walsh |
spellingShingle |
Igor V. Polyakov Roman V. Bekryaev Genrikh V. Alekseev Uma S. Bhatt Roger L. Colony Mark A. Johnson Alexander P. Maskshtas David Walsh Variability and trends of air temperature and pressure |
author_facet |
Igor V. Polyakov Roman V. Bekryaev Genrikh V. Alekseev Uma S. Bhatt Roger L. Colony Mark A. Johnson Alexander P. Maskshtas David Walsh |
author_sort |
Igor V. Polyakov |
title |
Variability and trends of air temperature and pressure |
title_short |
Variability and trends of air temperature and pressure |
title_full |
Variability and trends of air temperature and pressure |
title_fullStr |
Variability and trends of air temperature and pressure |
title_full_unstemmed |
Variability and trends of air temperature and pressure |
title_sort |
variability and trends of air temperature and pressure |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.473.7364 http://www.personal.kent.edu/~jortiz/paleoceanography/warm_apr02.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
http://www.personal.kent.edu/~jortiz/paleoceanography/warm_apr02.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.473.7364 http://www.personal.kent.edu/~jortiz/paleoceanography/warm_apr02.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766307011397419008 |