Circulation patterns associated with trends in summer temperature variability patterns in North America
Abstract This study improves the understanding of circulation patterns associated with regional temperature trends by characterizing boreal summer temperature variability patterns in North America using rotated S-mode principal component analysis. We analyzed gridded observational 2-m temperature da...
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ftdoajarticles:oai:doaj.org/article:ae5c4d91fa25464ca173b49fd86367ed 2023-09-05T13:17:18+02:00 Circulation patterns associated with trends in summer temperature variability patterns in North America Chibuike Chiedozie Ibebuchi Cameron C. Lee 2023-08-01T00:00:00Z https://doi.org/10.1038/s41598-023-39497-5 https://doaj.org/article/ae5c4d91fa25464ca173b49fd86367ed EN eng Nature Portfolio https://doi.org/10.1038/s41598-023-39497-5 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-023-39497-5 2045-2322 https://doaj.org/article/ae5c4d91fa25464ca173b49fd86367ed Scientific Reports, Vol 13, Iss 1, Pp 1-13 (2023) Medicine R Science Q article 2023 ftdoajarticles https://doi.org/10.1038/s41598-023-39497-5 2023-08-13T00:40:42Z Abstract This study improves the understanding of circulation patterns associated with regional temperature trends by characterizing boreal summer temperature variability patterns in North America using rotated S-mode principal component analysis. We analyzed gridded observational 2-m temperature datasets and the ERA5 reanalysis temperature dataset to examine the climate patterns associated with long-term trends and inter-annual variability of temperature variability patterns in North America. Our analysis revealed significant trends among some classified temperature variability patterns from 1979 to 2022 summers, with inter-annual amplitudes (i.e., a departure from the mean state) signaling toward the warm regime. The anticyclonic circulation anomaly over the temperature coherent regions associated with Greenland/northeastern Canada, and Alaska, respectively, is linked to an increase in warm air advection and above-average temperatures, while cyclonic circulation over the northeast Pacific coast enhanced warm air advection and temperature increases in the coherent region comprising the northwestern portion of North America. The increase in global mean land and ocean temperatures is strongly associated with the long-term increase in the amplitude of atmospheric circulations associated with warm regimes in parts of North America. At the interannual time scale, temperature increase over Greenland/northeastern Canada is strongly associated with the negative phase of the Arctic Oscillation. These findings highlight the modulating effects of global temperature increase and warming of the western tropical Pacific Ocean on the increasing amplitude of circulations associated with warm regimes in North America. Our results further indicate that the enhancement of anticyclonic circulations over the Arctic contributes to nearly 68% of the observed reduction in sea ice extent. Article in Journal/Newspaper Arctic Greenland Sea ice Alaska Directory of Open Access Journals: DOAJ Articles Arctic Canada Greenland Pacific Scientific Reports 13 1 |
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Medicine R Science Q Chibuike Chiedozie Ibebuchi Cameron C. Lee Circulation patterns associated with trends in summer temperature variability patterns in North America |
topic_facet |
Medicine R Science Q |
description |
Abstract This study improves the understanding of circulation patterns associated with regional temperature trends by characterizing boreal summer temperature variability patterns in North America using rotated S-mode principal component analysis. We analyzed gridded observational 2-m temperature datasets and the ERA5 reanalysis temperature dataset to examine the climate patterns associated with long-term trends and inter-annual variability of temperature variability patterns in North America. Our analysis revealed significant trends among some classified temperature variability patterns from 1979 to 2022 summers, with inter-annual amplitudes (i.e., a departure from the mean state) signaling toward the warm regime. The anticyclonic circulation anomaly over the temperature coherent regions associated with Greenland/northeastern Canada, and Alaska, respectively, is linked to an increase in warm air advection and above-average temperatures, while cyclonic circulation over the northeast Pacific coast enhanced warm air advection and temperature increases in the coherent region comprising the northwestern portion of North America. The increase in global mean land and ocean temperatures is strongly associated with the long-term increase in the amplitude of atmospheric circulations associated with warm regimes in parts of North America. At the interannual time scale, temperature increase over Greenland/northeastern Canada is strongly associated with the negative phase of the Arctic Oscillation. These findings highlight the modulating effects of global temperature increase and warming of the western tropical Pacific Ocean on the increasing amplitude of circulations associated with warm regimes in North America. Our results further indicate that the enhancement of anticyclonic circulations over the Arctic contributes to nearly 68% of the observed reduction in sea ice extent. |
format |
Article in Journal/Newspaper |
author |
Chibuike Chiedozie Ibebuchi Cameron C. Lee |
author_facet |
Chibuike Chiedozie Ibebuchi Cameron C. Lee |
author_sort |
Chibuike Chiedozie Ibebuchi |
title |
Circulation patterns associated with trends in summer temperature variability patterns in North America |
title_short |
Circulation patterns associated with trends in summer temperature variability patterns in North America |
title_full |
Circulation patterns associated with trends in summer temperature variability patterns in North America |
title_fullStr |
Circulation patterns associated with trends in summer temperature variability patterns in North America |
title_full_unstemmed |
Circulation patterns associated with trends in summer temperature variability patterns in North America |
title_sort |
circulation patterns associated with trends in summer temperature variability patterns in north america |
publisher |
Nature Portfolio |
publishDate |
2023 |
url |
https://doi.org/10.1038/s41598-023-39497-5 https://doaj.org/article/ae5c4d91fa25464ca173b49fd86367ed |
geographic |
Arctic Canada Greenland Pacific |
geographic_facet |
Arctic Canada Greenland Pacific |
genre |
Arctic Greenland Sea ice Alaska |
genre_facet |
Arctic Greenland Sea ice Alaska |
op_source |
Scientific Reports, Vol 13, Iss 1, Pp 1-13 (2023) |
op_relation |
https://doi.org/10.1038/s41598-023-39497-5 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-023-39497-5 2045-2322 https://doaj.org/article/ae5c4d91fa25464ca173b49fd86367ed |
op_doi |
https://doi.org/10.1038/s41598-023-39497-5 |
container_title |
Scientific Reports |
container_volume |
13 |
container_issue |
1 |
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1776198519355342848 |