On the origin of multidecadal to centennial Greenland temperature anomalies over the past 800 yr
The surface temperature of the Greenland ice sheet is among the most important climate variables for assessing how climate change may impact human societies due to its association with sea level rise. However, the causes of multidecadal-to-centennial temperature changes in Greenland temperatures are...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2013
|
Subjects: | |
Online Access: | https://doi.org/10.5194/cp-9-583-2013 http://www.clim-past.net/9/583/2013/cp-9-583-2013.pdf https://doaj.org/article/2d6078d1bb8c45f7a7311c5fb8e1dc35 |
id |
fttriple:oai:gotriple.eu:oai:doaj.org/article:2d6078d1bb8c45f7a7311c5fb8e1dc35 |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:oai:doaj.org/article:2d6078d1bb8c45f7a7311c5fb8e1dc35 2023-05-15T15:08:15+02:00 On the origin of multidecadal to centennial Greenland temperature anomalies over the past 800 yr T. Kobashi D. T. Shindell K. Kodera J. E. Box T. Nakaegawa K. Kawamura 2013-03-01 https://doi.org/10.5194/cp-9-583-2013 http://www.clim-past.net/9/583/2013/cp-9-583-2013.pdf https://doaj.org/article/2d6078d1bb8c45f7a7311c5fb8e1dc35 en eng Copernicus Publications doi:10.5194/cp-9-583-2013 1814-9324 1814-9332 http://www.clim-past.net/9/583/2013/cp-9-583-2013.pdf https://doaj.org/article/2d6078d1bb8c45f7a7311c5fb8e1dc35 undefined Climate of the Past, Vol 9, Iss 2, Pp 583-596 (2013) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2013 fttriple https://doi.org/10.5194/cp-9-583-2013 2023-01-22T19:05:35Z The surface temperature of the Greenland ice sheet is among the most important climate variables for assessing how climate change may impact human societies due to its association with sea level rise. However, the causes of multidecadal-to-centennial temperature changes in Greenland temperatures are not well understood, largely owing to short observational records. To examine these, we calculated the Greenland temperature anomalies (GTA[G-NH]) over the past 800 yr by subtracting the standardized northern hemispheric (NH) temperature from the standardized Greenland temperature. This decomposes the Greenland temperature variation into background climate (NH); polar amplification; and regional variability (GTA[G-NH]). The central Greenland polar amplification factor as expressed by the variance ratio Greenland/NH is 2.6 over the past 161 yr, and 3.3–4.2 over the past 800 yr. The GTA[G-NH] explains 31–35% of the variation of Greenland temperature in the multidecadal-to-centennial time scale over the past 800 yr. We found that the GTA[G-NH] has been influenced by solar-induced changes in atmospheric circulation patterns such as those produced by the North Atlantic Oscillation/Arctic Oscillation (NAO/AO). Climate modeling and proxy temperature records indicate that the anomaly is also likely linked to solar-paced changes in the Atlantic meridional overturning circulation (AMOC) and associated changes in northward oceanic heat transport. Article in Journal/Newspaper Arctic Climate change Greenland Ice Sheet North Atlantic North Atlantic oscillation Unknown Arctic Greenland Climate of the Past 9 2 583 596 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
envir geo |
spellingShingle |
envir geo T. Kobashi D. T. Shindell K. Kodera J. E. Box T. Nakaegawa K. Kawamura On the origin of multidecadal to centennial Greenland temperature anomalies over the past 800 yr |
topic_facet |
envir geo |
description |
The surface temperature of the Greenland ice sheet is among the most important climate variables for assessing how climate change may impact human societies due to its association with sea level rise. However, the causes of multidecadal-to-centennial temperature changes in Greenland temperatures are not well understood, largely owing to short observational records. To examine these, we calculated the Greenland temperature anomalies (GTA[G-NH]) over the past 800 yr by subtracting the standardized northern hemispheric (NH) temperature from the standardized Greenland temperature. This decomposes the Greenland temperature variation into background climate (NH); polar amplification; and regional variability (GTA[G-NH]). The central Greenland polar amplification factor as expressed by the variance ratio Greenland/NH is 2.6 over the past 161 yr, and 3.3–4.2 over the past 800 yr. The GTA[G-NH] explains 31–35% of the variation of Greenland temperature in the multidecadal-to-centennial time scale over the past 800 yr. We found that the GTA[G-NH] has been influenced by solar-induced changes in atmospheric circulation patterns such as those produced by the North Atlantic Oscillation/Arctic Oscillation (NAO/AO). Climate modeling and proxy temperature records indicate that the anomaly is also likely linked to solar-paced changes in the Atlantic meridional overturning circulation (AMOC) and associated changes in northward oceanic heat transport. |
format |
Article in Journal/Newspaper |
author |
T. Kobashi D. T. Shindell K. Kodera J. E. Box T. Nakaegawa K. Kawamura |
author_facet |
T. Kobashi D. T. Shindell K. Kodera J. E. Box T. Nakaegawa K. Kawamura |
author_sort |
T. Kobashi |
title |
On the origin of multidecadal to centennial Greenland temperature anomalies over the past 800 yr |
title_short |
On the origin of multidecadal to centennial Greenland temperature anomalies over the past 800 yr |
title_full |
On the origin of multidecadal to centennial Greenland temperature anomalies over the past 800 yr |
title_fullStr |
On the origin of multidecadal to centennial Greenland temperature anomalies over the past 800 yr |
title_full_unstemmed |
On the origin of multidecadal to centennial Greenland temperature anomalies over the past 800 yr |
title_sort |
on the origin of multidecadal to centennial greenland temperature anomalies over the past 800 yr |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/cp-9-583-2013 http://www.clim-past.net/9/583/2013/cp-9-583-2013.pdf https://doaj.org/article/2d6078d1bb8c45f7a7311c5fb8e1dc35 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Climate change Greenland Ice Sheet North Atlantic North Atlantic oscillation |
genre_facet |
Arctic Climate change Greenland Ice Sheet North Atlantic North Atlantic oscillation |
op_source |
Climate of the Past, Vol 9, Iss 2, Pp 583-596 (2013) |
op_relation |
doi:10.5194/cp-9-583-2013 1814-9324 1814-9332 http://www.clim-past.net/9/583/2013/cp-9-583-2013.pdf https://doaj.org/article/2d6078d1bb8c45f7a7311c5fb8e1dc35 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-9-583-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
2 |
container_start_page |
583 |
op_container_end_page |
596 |
_version_ |
1766339648664109056 |