Changes in Atmospheric Dynamics Over Dansgaard‐Oeschger Climate Oscillations Around 40 ka and Their Impact on Europe
Abstract Dansgaard‐Oeschger (D‐O) climate variability during the last glaciation was first evidenced in ice cores and marine sediments, and is also recorded in various terrestrial paleoclimate archives in Europe. The relative synchronicity across Greenland, the North Atlantic and Europe implies a ti...
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ftsubggeo:oai:e-docs.geo-leo.de:11858/11715 2024-05-19T07:41:11+00:00 Changes in Atmospheric Dynamics Over Dansgaard‐Oeschger Climate Oscillations Around 40 ka and Their Impact on Europe Stadelmaier, Kim H. Ludwig, Patrick Pinto, Joaquim G. Újvári, Gábor 2024-01-31 https://doi.org/10.1029/2023JD040247 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/11715 eng eng 2169-897X 2169-8996 doi:10.1029/2023JD040247 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/11715 This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. ddc:551.6 Dansgaard‐Oeschger cycle regional atmospheric dynamics regional climate modeling continental paleoclimate proxy Europe doc-type:article 2024 ftsubggeo https://doi.org/10.1029/2023JD040247 2024-04-30T23:31:11Z Abstract Dansgaard‐Oeschger (D‐O) climate variability during the last glaciation was first evidenced in ice cores and marine sediments, and is also recorded in various terrestrial paleoclimate archives in Europe. The relative synchronicity across Greenland, the North Atlantic and Europe implies a tight and fast coupling between those regions, most probably effectuated by an atmospheric transmission mechanism. In this study, we investigated the atmospheric changes during Greenland interstadial (GI) and stadial (GS) phases based on regional climate model simulations using two specific periods, GI‐10 and GS‐9 both around 40 ka, as boundary conditions. Our simulations accurately capture the changes in temperature and precipitation as reconstructed by the available proxy data. Moreover, the simulations depict an intensified and southward shifted eddy‐driven jet during the stadial period. Ultimately, this affects the near‐surface circulation toward more southwesterly and cyclonic flow in western Europe during the stadial period, explaining much of the seasonal climate variability recorded by the proxy data, including oxygen isotopes, at the considered proxy sites. Plain Language Summary: The climate during the last ice age varied between colder and warmer periods on timescales ranging from hundreds to thousands of years. This variability was first detected in Greenland ice cores and marine sediment cores of the North Atlantic, as well as in continental geological records in Europe. The variation between the colder and warmer periods occur mostly simultaneously in Greenland and in Europe, which is why the atmosphere is assumed to have an important role in transferring the climate signals. We simulated two different periods of the last ice age, one colder and one warmer around 40,000 years ago, using a regional climate model. The aim was to study how the climate and atmospheric circulation changed during these two periods. We find the eddy‐driven jet over the North Atlantic intensified and shifted southward during the ... Article in Journal/Newspaper Greenland Greenland ice cores North Atlantic GEO-LEOe-docs (FID GEO) Journal of Geophysical Research: Atmospheres 129 3 |
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Open Polar |
collection |
GEO-LEOe-docs (FID GEO) |
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ftsubggeo |
language |
English |
topic |
ddc:551.6 Dansgaard‐Oeschger cycle regional atmospheric dynamics regional climate modeling continental paleoclimate proxy Europe |
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ddc:551.6 Dansgaard‐Oeschger cycle regional atmospheric dynamics regional climate modeling continental paleoclimate proxy Europe Stadelmaier, Kim H. Ludwig, Patrick Pinto, Joaquim G. Újvári, Gábor Changes in Atmospheric Dynamics Over Dansgaard‐Oeschger Climate Oscillations Around 40 ka and Their Impact on Europe |
topic_facet |
ddc:551.6 Dansgaard‐Oeschger cycle regional atmospheric dynamics regional climate modeling continental paleoclimate proxy Europe |
description |
Abstract Dansgaard‐Oeschger (D‐O) climate variability during the last glaciation was first evidenced in ice cores and marine sediments, and is also recorded in various terrestrial paleoclimate archives in Europe. The relative synchronicity across Greenland, the North Atlantic and Europe implies a tight and fast coupling between those regions, most probably effectuated by an atmospheric transmission mechanism. In this study, we investigated the atmospheric changes during Greenland interstadial (GI) and stadial (GS) phases based on regional climate model simulations using two specific periods, GI‐10 and GS‐9 both around 40 ka, as boundary conditions. Our simulations accurately capture the changes in temperature and precipitation as reconstructed by the available proxy data. Moreover, the simulations depict an intensified and southward shifted eddy‐driven jet during the stadial period. Ultimately, this affects the near‐surface circulation toward more southwesterly and cyclonic flow in western Europe during the stadial period, explaining much of the seasonal climate variability recorded by the proxy data, including oxygen isotopes, at the considered proxy sites. Plain Language Summary: The climate during the last ice age varied between colder and warmer periods on timescales ranging from hundreds to thousands of years. This variability was first detected in Greenland ice cores and marine sediment cores of the North Atlantic, as well as in continental geological records in Europe. The variation between the colder and warmer periods occur mostly simultaneously in Greenland and in Europe, which is why the atmosphere is assumed to have an important role in transferring the climate signals. We simulated two different periods of the last ice age, one colder and one warmer around 40,000 years ago, using a regional climate model. The aim was to study how the climate and atmospheric circulation changed during these two periods. We find the eddy‐driven jet over the North Atlantic intensified and shifted southward during the ... |
format |
Article in Journal/Newspaper |
author |
Stadelmaier, Kim H. Ludwig, Patrick Pinto, Joaquim G. Újvári, Gábor |
author_facet |
Stadelmaier, Kim H. Ludwig, Patrick Pinto, Joaquim G. Újvári, Gábor |
author_sort |
Stadelmaier, Kim H. |
title |
Changes in Atmospheric Dynamics Over Dansgaard‐Oeschger Climate Oscillations Around 40 ka and Their Impact on Europe |
title_short |
Changes in Atmospheric Dynamics Over Dansgaard‐Oeschger Climate Oscillations Around 40 ka and Their Impact on Europe |
title_full |
Changes in Atmospheric Dynamics Over Dansgaard‐Oeschger Climate Oscillations Around 40 ka and Their Impact on Europe |
title_fullStr |
Changes in Atmospheric Dynamics Over Dansgaard‐Oeschger Climate Oscillations Around 40 ka and Their Impact on Europe |
title_full_unstemmed |
Changes in Atmospheric Dynamics Over Dansgaard‐Oeschger Climate Oscillations Around 40 ka and Their Impact on Europe |
title_sort |
changes in atmospheric dynamics over dansgaard‐oeschger climate oscillations around 40 ka and their impact on europe |
publishDate |
2024 |
url |
https://doi.org/10.1029/2023JD040247 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/11715 |
genre |
Greenland Greenland ice cores North Atlantic |
genre_facet |
Greenland Greenland ice cores North Atlantic |
op_relation |
2169-897X 2169-8996 doi:10.1029/2023JD040247 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/11715 |
op_rights |
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_doi |
https://doi.org/10.1029/2023JD040247 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
129 |
container_issue |
3 |
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1799480769799782400 |