Improving temperature reconstructions from ice-core water-isotope records
Oxygen and hydrogen isotope ratios in polar precipitation are widely used as proxies for local temperature. In combination, oxygen and hydrogen isotope ratios also provide information on sea surface temperature at the oceanic moisture source locations where polar precipitation originates. Temperatur...
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Online Access: | https://doi.org/10.5194/cp-18-1321-2022 https://doaj.org/article/9be60c4c01b34cb88baf44bcddedec59 |
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ftdoajarticles:oai:doaj.org/article:9be60c4c01b34cb88baf44bcddedec59 2023-05-15T13:38:40+02:00 Improving temperature reconstructions from ice-core water-isotope records B. R. Markle E. J. Steig 2022-06-01T00:00:00Z https://doi.org/10.5194/cp-18-1321-2022 https://doaj.org/article/9be60c4c01b34cb88baf44bcddedec59 EN eng Copernicus Publications https://cp.copernicus.org/articles/18/1321/2022/cp-18-1321-2022.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-18-1321-2022 1814-9324 1814-9332 https://doaj.org/article/9be60c4c01b34cb88baf44bcddedec59 Climate of the Past, Vol 18, Pp 1321-1368 (2022) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2022 ftdoajarticles https://doi.org/10.5194/cp-18-1321-2022 2022-12-30T23:12:05Z Oxygen and hydrogen isotope ratios in polar precipitation are widely used as proxies for local temperature. In combination, oxygen and hydrogen isotope ratios also provide information on sea surface temperature at the oceanic moisture source locations where polar precipitation originates. Temperature reconstructions obtained from ice-core records generally rely on linear approximations of the relationships among local temperature, source temperature, and water-isotope values. However, there are important nonlinearities that significantly affect such reconstructions, particularly for source region temperatures. Here, we describe a relatively simple water-isotope distillation model and a novel temperature reconstruction method that accounts for these nonlinearities. Further, we examine in detail many of the parameters, assumptions, and uncertainties that underlie water-isotope distillation models and their influence on these temperature reconstructions. We provide new reconstructions of absolute surface temperature, condensation temperature, and source region evaporation temperature for all long Antarctic ice-core records for which the necessary data are available. These reconstructions differ from previous estimates due to both our new model and reconstruction technique, the influence of which is investigated directly. We also provide thorough uncertainty estimates for all temperature histories. Our reconstructions constrain the pattern and magnitude of polar amplification in the past and reveal asymmetries in the temperature histories of East and West Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core West Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic West Antarctica Climate of the Past 18 6 1321 1368 |
institution |
Open Polar |
collection |
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 B. R. Markle E. J. Steig Improving temperature reconstructions from ice-core water-isotope records |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Oxygen and hydrogen isotope ratios in polar precipitation are widely used as proxies for local temperature. In combination, oxygen and hydrogen isotope ratios also provide information on sea surface temperature at the oceanic moisture source locations where polar precipitation originates. Temperature reconstructions obtained from ice-core records generally rely on linear approximations of the relationships among local temperature, source temperature, and water-isotope values. However, there are important nonlinearities that significantly affect such reconstructions, particularly for source region temperatures. Here, we describe a relatively simple water-isotope distillation model and a novel temperature reconstruction method that accounts for these nonlinearities. Further, we examine in detail many of the parameters, assumptions, and uncertainties that underlie water-isotope distillation models and their influence on these temperature reconstructions. We provide new reconstructions of absolute surface temperature, condensation temperature, and source region evaporation temperature for all long Antarctic ice-core records for which the necessary data are available. These reconstructions differ from previous estimates due to both our new model and reconstruction technique, the influence of which is investigated directly. We also provide thorough uncertainty estimates for all temperature histories. Our reconstructions constrain the pattern and magnitude of polar amplification in the past and reveal asymmetries in the temperature histories of East and West Antarctica. |
format |
Article in Journal/Newspaper |
author |
B. R. Markle E. J. Steig |
author_facet |
B. R. Markle E. J. Steig |
author_sort |
B. R. Markle |
title |
Improving temperature reconstructions from ice-core water-isotope records |
title_short |
Improving temperature reconstructions from ice-core water-isotope records |
title_full |
Improving temperature reconstructions from ice-core water-isotope records |
title_fullStr |
Improving temperature reconstructions from ice-core water-isotope records |
title_full_unstemmed |
Improving temperature reconstructions from ice-core water-isotope records |
title_sort |
improving temperature reconstructions from ice-core water-isotope records |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/cp-18-1321-2022 https://doaj.org/article/9be60c4c01b34cb88baf44bcddedec59 |
geographic |
Antarctic West Antarctica |
geographic_facet |
Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctica ice core West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica ice core West Antarctica |
op_source |
Climate of the Past, Vol 18, Pp 1321-1368 (2022) |
op_relation |
https://cp.copernicus.org/articles/18/1321/2022/cp-18-1321-2022.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-18-1321-2022 1814-9324 1814-9332 https://doaj.org/article/9be60c4c01b34cb88baf44bcddedec59 |
op_doi |
https://doi.org/10.5194/cp-18-1321-2022 |
container_title |
Climate of the Past |
container_volume |
18 |
container_issue |
6 |
container_start_page |
1321 |
op_container_end_page |
1368 |
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1766109246914560000 |