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...
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ftdoajarticles:oai:doaj.org/article:2d6078d1bb8c45f7a7311c5fb8e1dc35 2023-05-15T15:08:03+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 2013-03-01T00:00:00Z https://doi.org/10.5194/cp-9-583-2013 https://doaj.org/article/2d6078d1bb8c45f7a7311c5fb8e1dc35 EN eng Copernicus Publications http://www.clim-past.net/9/583/2013/cp-9-583-2013.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-9-583-2013 1814-9324 1814-9332 https://doaj.org/article/2d6078d1bb8c45f7a7311c5fb8e1dc35 Climate of the Past, Vol 9, Iss 2, Pp 583-596 (2013) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2013 ftdoajarticles https://doi.org/10.5194/cp-9-583-2013 2022-12-30T21:01:39Z 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 Directory of Open Access Journals: DOAJ Articles Arctic Greenland Climate of the Past 9 2 583 596 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 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 |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
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 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 |
http://www.clim-past.net/9/583/2013/cp-9-583-2013.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-9-583-2013 1814-9324 1814-9332 https://doaj.org/article/2d6078d1bb8c45f7a7311c5fb8e1dc35 |
op_doi |
https://doi.org/10.5194/cp-9-583-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
2 |
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583 |
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596 |
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1766339490613297152 |