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...
Published in: | Climate of the Past |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2022
|
Subjects: | |
Online Access: | https://doi.org/10.5194/cp-18-1321-2022 https://noa.gwlb.de/receive/cop_mods_00061584 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061028/cp-18-1321-2022.pdf https://cp.copernicus.org/articles/18/1321/2022/cp-18-1321-2022.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00061584 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00061584 2023-05-15T13:49:21+02:00 Improving temperature reconstructions from ice-core water-isotope records Markle, Bradley R. Steig, Eric J. 2022-06 electronic https://doi.org/10.5194/cp-18-1321-2022 https://noa.gwlb.de/receive/cop_mods_00061584 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061028/cp-18-1321-2022.pdf https://cp.copernicus.org/articles/18/1321/2022/cp-18-1321-2022.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-18-1321-2022 https://noa.gwlb.de/receive/cop_mods_00061584 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061028/cp-18-1321-2022.pdf https://cp.copernicus.org/articles/18/1321/2022/cp-18-1321-2022.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2022 ftnonlinearchiv https://doi.org/10.5194/cp-18-1321-2022 2022-06-26T23:11:40Z 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 Niedersächsisches Online-Archiv NOA Antarctic West Antarctica Climate of the Past 18 6 1321 1368 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Markle, Bradley R. Steig, Eric J. Improving temperature reconstructions from ice-core water-isotope records |
topic_facet |
article Verlagsveröffentlichung |
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 |
Markle, Bradley R. Steig, Eric J. |
author_facet |
Markle, Bradley R. Steig, Eric J. |
author_sort |
Markle, Bradley R. |
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://noa.gwlb.de/receive/cop_mods_00061584 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061028/cp-18-1321-2022.pdf https://cp.copernicus.org/articles/18/1321/2022/cp-18-1321-2022.pdf |
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_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-18-1321-2022 https://noa.gwlb.de/receive/cop_mods_00061584 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061028/cp-18-1321-2022.pdf https://cp.copernicus.org/articles/18/1321/2022/cp-18-1321-2022.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
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 |
_version_ |
1766251228789997568 |