Combined Analysis of Water Stable Isotopes ($H_{2}^{16}O, H_{2}^{17}O, H_{2}^{18}O, HD^{16}O$) in Ice Cores
Water stable isotopes are currently measured in polar ice cores. The long records of $δ_{18}O$ and δD provide unique information on the past polar temperature while the combination of $δ_{18}O$ and δD constrains the evolution of the oceanic evaporative regions. Recently, new analytical developments...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/45457 2023-05-15T13:42:37+02:00 Combined Analysis of Water Stable Isotopes ($H_{2}^{16}O, H_{2}^{17}O, H_{2}^{18}O, HD^{16}O$) in Ice Cores Landais, Amaelle Barkan, Eugeni Vimeux, Françoise Masson-Delmotte, Valérie Luz, Boaz http://hdl.handle.net/2115/45457 eng eng Institute of Low Temperature Science, Hokkaido University Physics of Ice Core Records II : Papers collected after the 2nd International Workshop on Physics of Ice Core Records, held in Sapporo, Japan, 2-6 February 2007. Edited by Takeo Hondoh http://hdl.handle.net/2115/45457 ice core water isotopes water cycle relative humidity deglaciation 400 bulletin (article) fthokunivhus 2022-11-18T01:02:09Z Water stable isotopes are currently measured in polar ice cores. The long records of $δ_{18}O$ and δD provide unique information on the past polar temperature while the combination of $δ_{18}O$ and δD constrains the evolution of the oceanic evaporative regions. Recently, new analytical developments have made it possible to measure with high precision a new isotopic ratio in water, $δ_{17}O$. As for δD and $δ_{18}0$, the combination of $δ_{17}0$ and $δ_{18}0$ shows a high dependence with the climatic conditions during evaporation. Based on measurements of the different isotopic ratios in Antarctica surface snow, we show that while the combination of $δ_{18}0$ and δD in the so-called d-excess displays variation with local climatic conditions in the polar regions in addition to the influence of the evaporative regions, the combination of $δ_{17}0$ and $δ_{18}0$ in the so-called $^{17}O_{excess}$ is not modified during the air mass transportation above the polar regions. This makes $^{17}O_{excess}$ a simpler parameter than d-excess to constrain the evolution of the oceanic evaporative regions. Finally, records of d-excess and $^{17}O_{excess}$ over the deglaciation in the Vostok ice core suggest significant changes in the evaporative regions. Our interpretation is that the relative humidity over the ocean was higher during the glacial period than today and that reevaporation increased over the deglaciation. IV. Chemical properties and isotopes Article in Journal/Newspaper Antarc* Antarctica ice core Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
ice core water isotopes water cycle relative humidity deglaciation 400 |
spellingShingle |
ice core water isotopes water cycle relative humidity deglaciation 400 Landais, Amaelle Barkan, Eugeni Vimeux, Françoise Masson-Delmotte, Valérie Luz, Boaz Combined Analysis of Water Stable Isotopes ($H_{2}^{16}O, H_{2}^{17}O, H_{2}^{18}O, HD^{16}O$) in Ice Cores |
topic_facet |
ice core water isotopes water cycle relative humidity deglaciation 400 |
description |
Water stable isotopes are currently measured in polar ice cores. The long records of $δ_{18}O$ and δD provide unique information on the past polar temperature while the combination of $δ_{18}O$ and δD constrains the evolution of the oceanic evaporative regions. Recently, new analytical developments have made it possible to measure with high precision a new isotopic ratio in water, $δ_{17}O$. As for δD and $δ_{18}0$, the combination of $δ_{17}0$ and $δ_{18}0$ shows a high dependence with the climatic conditions during evaporation. Based on measurements of the different isotopic ratios in Antarctica surface snow, we show that while the combination of $δ_{18}0$ and δD in the so-called d-excess displays variation with local climatic conditions in the polar regions in addition to the influence of the evaporative regions, the combination of $δ_{17}0$ and $δ_{18}0$ in the so-called $^{17}O_{excess}$ is not modified during the air mass transportation above the polar regions. This makes $^{17}O_{excess}$ a simpler parameter than d-excess to constrain the evolution of the oceanic evaporative regions. Finally, records of d-excess and $^{17}O_{excess}$ over the deglaciation in the Vostok ice core suggest significant changes in the evaporative regions. Our interpretation is that the relative humidity over the ocean was higher during the glacial period than today and that reevaporation increased over the deglaciation. IV. Chemical properties and isotopes |
format |
Article in Journal/Newspaper |
author |
Landais, Amaelle Barkan, Eugeni Vimeux, Françoise Masson-Delmotte, Valérie Luz, Boaz |
author_facet |
Landais, Amaelle Barkan, Eugeni Vimeux, Françoise Masson-Delmotte, Valérie Luz, Boaz |
author_sort |
Landais, Amaelle |
title |
Combined Analysis of Water Stable Isotopes ($H_{2}^{16}O, H_{2}^{17}O, H_{2}^{18}O, HD^{16}O$) in Ice Cores |
title_short |
Combined Analysis of Water Stable Isotopes ($H_{2}^{16}O, H_{2}^{17}O, H_{2}^{18}O, HD^{16}O$) in Ice Cores |
title_full |
Combined Analysis of Water Stable Isotopes ($H_{2}^{16}O, H_{2}^{17}O, H_{2}^{18}O, HD^{16}O$) in Ice Cores |
title_fullStr |
Combined Analysis of Water Stable Isotopes ($H_{2}^{16}O, H_{2}^{17}O, H_{2}^{18}O, HD^{16}O$) in Ice Cores |
title_full_unstemmed |
Combined Analysis of Water Stable Isotopes ($H_{2}^{16}O, H_{2}^{17}O, H_{2}^{18}O, HD^{16}O$) in Ice Cores |
title_sort |
combined analysis of water stable isotopes ($h_{2}^{16}o, h_{2}^{17}o, h_{2}^{18}o, hd^{16}o$) in ice cores |
publisher |
Institute of Low Temperature Science, Hokkaido University |
url |
http://hdl.handle.net/2115/45457 |
genre |
Antarc* Antarctica ice core |
genre_facet |
Antarc* Antarctica ice core |
op_relation |
Physics of Ice Core Records II : Papers collected after the 2nd International Workshop on Physics of Ice Core Records, held in Sapporo, Japan, 2-6 February 2007. Edited by Takeo Hondoh http://hdl.handle.net/2115/45457 |
_version_ |
1766170130101829632 |