Reconstruction of past Antarctic temperature using present seasonal δ18O-inversion layer temperature: Unified slope equations and applications
Reconstructing the history of polar temperature from ice core water isotope (618O) calibration has remained a challenge in paleoclimate research, because of our incomplete understanding of various temperature-618O relationships. This paper resolves this classical problem in a new framework called th...
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Language: | English |
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2023
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Online Access: | https://doi.org/10.1175/JCLI-D-22-0012.1 |
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ftncar:oai:drupal-site.org:articles_26224 2023-10-01T03:50:38+02:00 Reconstruction of past Antarctic temperature using present seasonal δ18O-inversion layer temperature: Unified slope equations and applications Liu, Z. (author) He, C. (author) Yan, M. (author) Buizert, C. (author) Otto-Bliesner, Bette (author) Lu, F. (author) Zeng, C. (author) 2023-05-01 https://doi.org/10.1175/JCLI-D-22-0012.1 en eng Journal of Climate--0894-8755--1520-0442 articles:26224 doi:10.1175/JCLI-D-22-0012.1 ark:/85065/d7bg2szw Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. article Text 2023 ftncar https://doi.org/10.1175/JCLI-D-22-0012.1 2023-09-04T18:21:06Z Reconstructing the history of polar temperature from ice core water isotope (618O) calibration has remained a challenge in paleoclimate research, because of our incomplete understanding of various temperature-618O relationships. This paper resolves this classical problem in a new framework called the unified slope equations (USE), which illustrates the general relations among spatial and temporal 618O-surface temperature slopes. The USE is applied to the Antarctica temper-ature change during the last deglaciation in model simulations and observations. It is shown that the comparable Antarctica -mean spatial slope with deglacial temporal slope in 618O-surface temperature reconstruction is caused, accidentally, by the compensation responses between the 618O-inversion layer temperature relation and the inversion layer temperature itself. Furthermore, in light of the USE, we propose that the present seasonal slope of 618O-inversion layer temperature is an opti-mal paleothermometer that is more accurate and robust than the spatial slope. This optimal slope suggests the possibility of reconstructing past Antarctic temperature changes using present and future instrumental observations. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Antarctic Journal of Climate 36 9 2933 2957 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
Reconstructing the history of polar temperature from ice core water isotope (618O) calibration has remained a challenge in paleoclimate research, because of our incomplete understanding of various temperature-618O relationships. This paper resolves this classical problem in a new framework called the unified slope equations (USE), which illustrates the general relations among spatial and temporal 618O-surface temperature slopes. The USE is applied to the Antarctica temper-ature change during the last deglaciation in model simulations and observations. It is shown that the comparable Antarctica -mean spatial slope with deglacial temporal slope in 618O-surface temperature reconstruction is caused, accidentally, by the compensation responses between the 618O-inversion layer temperature relation and the inversion layer temperature itself. Furthermore, in light of the USE, we propose that the present seasonal slope of 618O-inversion layer temperature is an opti-mal paleothermometer that is more accurate and robust than the spatial slope. This optimal slope suggests the possibility of reconstructing past Antarctic temperature changes using present and future instrumental observations. |
author2 |
Liu, Z. (author) He, C. (author) Yan, M. (author) Buizert, C. (author) Otto-Bliesner, Bette (author) Lu, F. (author) Zeng, C. (author) |
format |
Article in Journal/Newspaper |
title |
Reconstruction of past Antarctic temperature using present seasonal δ18O-inversion layer temperature: Unified slope equations and applications |
spellingShingle |
Reconstruction of past Antarctic temperature using present seasonal δ18O-inversion layer temperature: Unified slope equations and applications |
title_short |
Reconstruction of past Antarctic temperature using present seasonal δ18O-inversion layer temperature: Unified slope equations and applications |
title_full |
Reconstruction of past Antarctic temperature using present seasonal δ18O-inversion layer temperature: Unified slope equations and applications |
title_fullStr |
Reconstruction of past Antarctic temperature using present seasonal δ18O-inversion layer temperature: Unified slope equations and applications |
title_full_unstemmed |
Reconstruction of past Antarctic temperature using present seasonal δ18O-inversion layer temperature: Unified slope equations and applications |
title_sort |
reconstruction of past antarctic temperature using present seasonal î´18o-inversion layer temperature: unified slope equations and applications |
publishDate |
2023 |
url |
https://doi.org/10.1175/JCLI-D-22-0012.1 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica ice core |
op_relation |
Journal of Climate--0894-8755--1520-0442 articles:26224 doi:10.1175/JCLI-D-22-0012.1 ark:/85065/d7bg2szw |
op_rights |
Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
op_doi |
https://doi.org/10.1175/JCLI-D-22-0012.1 |
container_title |
Journal of Climate |
container_volume |
36 |
container_issue |
9 |
container_start_page |
2933 |
op_container_end_page |
2957 |
_version_ |
1778525622582116352 |