Modelling the response of stable water isotopes in Greenland precipitation to orbital configurations of the previous interglacial
The relation between δ 18O of precipitation and temperature has been used in numerous studies to reconstruct past temperatures at ice core sites in Greenland and Antarctica. During the past two decades, it has become clear that the slope between δ 18O and temperature varies in both space and time. H...
Published in: | Tellus B: Chemical and Physical Meteorology |
---|---|
Main Authors: | , , |
Format: | Other/Unknown Material |
Language: | English |
Published: |
Taylor & Francis
2014
|
Subjects: | |
Online Access: | https://oskar-bordeaux.fr/handle/20.500.12278/35478 https://doi.org/10.3402/tellusb.v66.22872 |
id |
ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/35478 |
---|---|
record_format |
openpolar |
spelling |
ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/35478 2023-05-15T13:46:14+02:00 Modelling the response of stable water isotopes in Greenland precipitation to orbital configurations of the previous interglacial SJOLTE, Jesper HOFFMANN, Georg JOHNSEN, Sigfús Jóhann 2014 https://oskar-bordeaux.fr/handle/20.500.12278/35478 https://doi.org/10.3402/tellusb.v66.22872 en eng Taylor & Francis 0280-6509 https://oskar-bordeaux.fr/handle/20.500.12278/35478 doi:10.3402/tellusb.v66.22872 stable water isotopes modelling moisture source seasonality previous interglacial Planète et Univers [physics]/Océan Atmosphère Planète et Univers [physics]/Sciences de la Terre/Climatologie Planète et Univers [physics]/Sciences de la Terre/Météorologie Article de revue 2014 ftoskarbordeaux https://doi.org/10.3402/tellusb.v66.22872 2021-05-11T22:29:49Z The relation between δ 18O of precipitation and temperature has been used in numerous studies to reconstruct past temperatures at ice core sites in Greenland and Antarctica. During the past two decades, it has become clear that the slope between δ 18O and temperature varies in both space and time. Here, we use a general circulation model driven by changes in orbital parameters to investigate the Greenland δ 18O–temperature relation for the previous interglacial, the Eemian. In our analysis, we focus on changes in the moisture source regions, and the results underline the importance of taking the seasonality of climate change into account. The orbitally driven experiments show that continental evaporation over North America increases during summer in the warm parts of the Eemian, while marine evaporation decreases. This likely flattens the Greenland δ 18O response to temperature during summer. Since the main climate change in the experiments occurs during summer this adds to a limited response of δ 18O, which is more strongly tied to temperature during winter than during summer. A south–west to north–east gradient in the δ 18O–temperature slope is also evident for Greenland, with low slopes in the south–west and steeper slopes in the north–east. This probably reflects the proportion of continental moisture and Arctic moisture arriving in Greenland, with more continental moisture in the south–west and less in the north–east, and vice versa for the Arctic moisture. Other/Unknown Material Antarc* Antarctica Arctic Climate change Greenland ice core OSKAR Bordeaux (Open Science Knowledge ARchive) Arctic Greenland Tellus B: Chemical and Physical Meteorology 66 1 22872 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
stable water isotopes modelling moisture source seasonality previous interglacial Planète et Univers [physics]/Océan Atmosphère Planète et Univers [physics]/Sciences de la Terre/Climatologie Planète et Univers [physics]/Sciences de la Terre/Météorologie |
spellingShingle |
stable water isotopes modelling moisture source seasonality previous interglacial Planète et Univers [physics]/Océan Atmosphère Planète et Univers [physics]/Sciences de la Terre/Climatologie Planète et Univers [physics]/Sciences de la Terre/Météorologie SJOLTE, Jesper HOFFMANN, Georg JOHNSEN, Sigfús Jóhann Modelling the response of stable water isotopes in Greenland precipitation to orbital configurations of the previous interglacial |
topic_facet |
stable water isotopes modelling moisture source seasonality previous interglacial Planète et Univers [physics]/Océan Atmosphère Planète et Univers [physics]/Sciences de la Terre/Climatologie Planète et Univers [physics]/Sciences de la Terre/Météorologie |
description |
The relation between δ 18O of precipitation and temperature has been used in numerous studies to reconstruct past temperatures at ice core sites in Greenland and Antarctica. During the past two decades, it has become clear that the slope between δ 18O and temperature varies in both space and time. Here, we use a general circulation model driven by changes in orbital parameters to investigate the Greenland δ 18O–temperature relation for the previous interglacial, the Eemian. In our analysis, we focus on changes in the moisture source regions, and the results underline the importance of taking the seasonality of climate change into account. The orbitally driven experiments show that continental evaporation over North America increases during summer in the warm parts of the Eemian, while marine evaporation decreases. This likely flattens the Greenland δ 18O response to temperature during summer. Since the main climate change in the experiments occurs during summer this adds to a limited response of δ 18O, which is more strongly tied to temperature during winter than during summer. A south–west to north–east gradient in the δ 18O–temperature slope is also evident for Greenland, with low slopes in the south–west and steeper slopes in the north–east. This probably reflects the proportion of continental moisture and Arctic moisture arriving in Greenland, with more continental moisture in the south–west and less in the north–east, and vice versa for the Arctic moisture. |
format |
Other/Unknown Material |
author |
SJOLTE, Jesper HOFFMANN, Georg JOHNSEN, Sigfús Jóhann |
author_facet |
SJOLTE, Jesper HOFFMANN, Georg JOHNSEN, Sigfús Jóhann |
author_sort |
SJOLTE, Jesper |
title |
Modelling the response of stable water isotopes in Greenland precipitation to orbital configurations of the previous interglacial |
title_short |
Modelling the response of stable water isotopes in Greenland precipitation to orbital configurations of the previous interglacial |
title_full |
Modelling the response of stable water isotopes in Greenland precipitation to orbital configurations of the previous interglacial |
title_fullStr |
Modelling the response of stable water isotopes in Greenland precipitation to orbital configurations of the previous interglacial |
title_full_unstemmed |
Modelling the response of stable water isotopes in Greenland precipitation to orbital configurations of the previous interglacial |
title_sort |
modelling the response of stable water isotopes in greenland precipitation to orbital configurations of the previous interglacial |
publisher |
Taylor & Francis |
publishDate |
2014 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/35478 https://doi.org/10.3402/tellusb.v66.22872 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Antarc* Antarctica Arctic Climate change Greenland ice core |
genre_facet |
Antarc* Antarctica Arctic Climate change Greenland ice core |
op_relation |
0280-6509 https://oskar-bordeaux.fr/handle/20.500.12278/35478 doi:10.3402/tellusb.v66.22872 |
op_doi |
https://doi.org/10.3402/tellusb.v66.22872 |
container_title |
Tellus B: Chemical and Physical Meteorology |
container_volume |
66 |
container_issue |
1 |
container_start_page |
22872 |
_version_ |
1766238797079511040 |