Tropical mountain ice core δ18O: A Goldilocks indicator for global temperature change.
Very high tropical alpine ice cores provide a distinct paleoclimate record for climate changes in the middle and upper troposphere. However, the climatic interpretation of a key proxy, the stable water oxygen isotopic ratio in ice cores (δ18Oice), remains an outstanding problem. Here, combining prox...
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ftcdlib:oai:escholarship.org:ark:/13030/qt7xz3v8qg 2023-12-17T10:31:39+01:00 Tropical mountain ice core δ18O: A Goldilocks indicator for global temperature change. Liu, Zhengyu Bao, Yuntao Thompson, Lonnie Mosley-Thompson, Ellen Tabor, Clay Zhang, Guang Yan, Mi Lofverstrom, Marcus Montanez, Isabel Oster, Jessica 2023-11-10 application/pdf https://escholarship.org/uc/item/7xz3v8qg unknown eScholarship, University of California qt7xz3v8qg https://escholarship.org/uc/item/7xz3v8qg public Science Advances, vol 9, iss 45 article 2023 ftcdlib 2023-11-20T19:04:53Z Very high tropical alpine ice cores provide a distinct paleoclimate record for climate changes in the middle and upper troposphere. However, the climatic interpretation of a key proxy, the stable water oxygen isotopic ratio in ice cores (δ18Oice), remains an outstanding problem. Here, combining proxy records with climate models, modern satellite measurements, and radiative-convective equilibrium theory, we show that the tropical δ18Oice is an indicator of the temperature of the middle and upper troposphere, with a glacial cooling of -7.35° ± 1.1°C (66% CI). Moreover, it severs as a Goldilocks-type indicator of global mean surface temperature change, providing the first estimate of glacial stage cooling that is independent of marine proxies as -5.9° ± 1.2°C.Combined with all estimations available gives the maximum likelihood estimate of glacial cooling as -5.85° ± 0.51°C. Article in Journal/Newspaper ice core University of California: eScholarship |
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Open Polar |
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University of California: eScholarship |
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unknown |
description |
Very high tropical alpine ice cores provide a distinct paleoclimate record for climate changes in the middle and upper troposphere. However, the climatic interpretation of a key proxy, the stable water oxygen isotopic ratio in ice cores (δ18Oice), remains an outstanding problem. Here, combining proxy records with climate models, modern satellite measurements, and radiative-convective equilibrium theory, we show that the tropical δ18Oice is an indicator of the temperature of the middle and upper troposphere, with a glacial cooling of -7.35° ± 1.1°C (66% CI). Moreover, it severs as a Goldilocks-type indicator of global mean surface temperature change, providing the first estimate of glacial stage cooling that is independent of marine proxies as -5.9° ± 1.2°C.Combined with all estimations available gives the maximum likelihood estimate of glacial cooling as -5.85° ± 0.51°C. |
format |
Article in Journal/Newspaper |
author |
Liu, Zhengyu Bao, Yuntao Thompson, Lonnie Mosley-Thompson, Ellen Tabor, Clay Zhang, Guang Yan, Mi Lofverstrom, Marcus Montanez, Isabel Oster, Jessica |
spellingShingle |
Liu, Zhengyu Bao, Yuntao Thompson, Lonnie Mosley-Thompson, Ellen Tabor, Clay Zhang, Guang Yan, Mi Lofverstrom, Marcus Montanez, Isabel Oster, Jessica Tropical mountain ice core δ18O: A Goldilocks indicator for global temperature change. |
author_facet |
Liu, Zhengyu Bao, Yuntao Thompson, Lonnie Mosley-Thompson, Ellen Tabor, Clay Zhang, Guang Yan, Mi Lofverstrom, Marcus Montanez, Isabel Oster, Jessica |
author_sort |
Liu, Zhengyu |
title |
Tropical mountain ice core δ18O: A Goldilocks indicator for global temperature change. |
title_short |
Tropical mountain ice core δ18O: A Goldilocks indicator for global temperature change. |
title_full |
Tropical mountain ice core δ18O: A Goldilocks indicator for global temperature change. |
title_fullStr |
Tropical mountain ice core δ18O: A Goldilocks indicator for global temperature change. |
title_full_unstemmed |
Tropical mountain ice core δ18O: A Goldilocks indicator for global temperature change. |
title_sort |
tropical mountain ice core δ18o: a goldilocks indicator for global temperature change. |
publisher |
eScholarship, University of California |
publishDate |
2023 |
url |
https://escholarship.org/uc/item/7xz3v8qg |
genre |
ice core |
genre_facet |
ice core |
op_source |
Science Advances, vol 9, iss 45 |
op_relation |
qt7xz3v8qg https://escholarship.org/uc/item/7xz3v8qg |
op_rights |
public |
_version_ |
1785585022578720768 |