A 2000-year temperature reconstruction on the East Antarctic plateau from argon–nitrogen and water stable isotopes in the Aurora Basin North ice core
The temperature of the Earth is one of the most important climate parameters. Proxy records of past climate changes, in particular temperature, represent a fundamental tool for exploring internal climate processes and natural climate forcings. Despite the excellent information provided by ice core r...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2023
|
Subjects: | |
Online Access: | https://doi.org/10.5194/cp-19-1125-2023 https://doaj.org/article/116f2309d61f449ca1e8657186e198e1 |
id |
ftdoajarticles:oai:doaj.org/article:116f2309d61f449ca1e8657186e198e1 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:116f2309d61f449ca1e8657186e198e1 2023-07-02T03:30:43+02:00 A 2000-year temperature reconstruction on the East Antarctic plateau from argon–nitrogen and water stable isotopes in the Aurora Basin North ice core A. P. M. Servettaz A. J. Orsi M. A. J. Curran A. D. Moy A. Landais J. R. McConnell T. J. Popp E. Le Meur X. Faïn J. Chappellaz 2023-06-01T00:00:00Z https://doi.org/10.5194/cp-19-1125-2023 https://doaj.org/article/116f2309d61f449ca1e8657186e198e1 EN eng Copernicus Publications https://cp.copernicus.org/articles/19/1125/2023/cp-19-1125-2023.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-19-1125-2023 1814-9324 1814-9332 https://doaj.org/article/116f2309d61f449ca1e8657186e198e1 Climate of the Past, Vol 19, Pp 1125-1152 (2023) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2023 ftdoajarticles https://doi.org/10.5194/cp-19-1125-2023 2023-06-11T00:35:52Z The temperature of the Earth is one of the most important climate parameters. Proxy records of past climate changes, in particular temperature, represent a fundamental tool for exploring internal climate processes and natural climate forcings. Despite the excellent information provided by ice core records in Antarctica, the temperature variability of the past 2000 years is difficult to evaluate from the low-accumulation sites in the Antarctic continent interior. Here we present the results from the Aurora Basin North (ABN) ice core (71 ∘ S, 111 ∘ E, 2690 m a.s.l.) in the lower part of the East Antarctic plateau, where accumulation is substantially higher than other ice core drilling sites on the plateau, and provide unprecedented insight into East Antarctic past temperature variability. We reconstructed the temperature of the last 2000 years using two independent methods: the widely used water stable isotopes ( δ 18 O) and by inverse modelling of borehole temperature and past temperature gradients estimated from the inert gas stable isotopes ( δ 40 Ar and δ 15 N). This second reconstruction is based on three independent measurement types: borehole temperature, firn thickness, and firn temperature gradient. The δ 18 O temperature reconstruction supports stable temperature conditions within 1 ∘ C over the past 2000 years, in agreement with other ice core δ 18 O records in the region. However, the gas and borehole temperature reconstruction suggests that surface conditions 2 ∘ C cooler than average prevailed in the 1000–1400 CE period and supports a 20th century warming of 1 ∘ C. A precipitation hiatus during cold periods could explain why water isotope temperature reconstruction underestimates the temperature changes. Both reconstructions arguably record climate in their own way, with a focus on atmospheric and hydrologic cycles for water isotopes, as opposed to surface temperature for gas isotopes and boreholes. This study demonstrates the importance of using a variety of sources for comprehensive paleoclimate ... Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Climate of the Past 19 6 1125 1152 |
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 A. P. M. Servettaz A. J. Orsi M. A. J. Curran A. D. Moy A. Landais J. R. McConnell T. J. Popp E. Le Meur X. Faïn J. Chappellaz A 2000-year temperature reconstruction on the East Antarctic plateau from argon–nitrogen and water stable isotopes in the Aurora Basin North ice core |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
The temperature of the Earth is one of the most important climate parameters. Proxy records of past climate changes, in particular temperature, represent a fundamental tool for exploring internal climate processes and natural climate forcings. Despite the excellent information provided by ice core records in Antarctica, the temperature variability of the past 2000 years is difficult to evaluate from the low-accumulation sites in the Antarctic continent interior. Here we present the results from the Aurora Basin North (ABN) ice core (71 ∘ S, 111 ∘ E, 2690 m a.s.l.) in the lower part of the East Antarctic plateau, where accumulation is substantially higher than other ice core drilling sites on the plateau, and provide unprecedented insight into East Antarctic past temperature variability. We reconstructed the temperature of the last 2000 years using two independent methods: the widely used water stable isotopes ( δ 18 O) and by inverse modelling of borehole temperature and past temperature gradients estimated from the inert gas stable isotopes ( δ 40 Ar and δ 15 N). This second reconstruction is based on three independent measurement types: borehole temperature, firn thickness, and firn temperature gradient. The δ 18 O temperature reconstruction supports stable temperature conditions within 1 ∘ C over the past 2000 years, in agreement with other ice core δ 18 O records in the region. However, the gas and borehole temperature reconstruction suggests that surface conditions 2 ∘ C cooler than average prevailed in the 1000–1400 CE period and supports a 20th century warming of 1 ∘ C. A precipitation hiatus during cold periods could explain why water isotope temperature reconstruction underestimates the temperature changes. Both reconstructions arguably record climate in their own way, with a focus on atmospheric and hydrologic cycles for water isotopes, as opposed to surface temperature for gas isotopes and boreholes. This study demonstrates the importance of using a variety of sources for comprehensive paleoclimate ... |
format |
Article in Journal/Newspaper |
author |
A. P. M. Servettaz A. J. Orsi M. A. J. Curran A. D. Moy A. Landais J. R. McConnell T. J. Popp E. Le Meur X. Faïn J. Chappellaz |
author_facet |
A. P. M. Servettaz A. J. Orsi M. A. J. Curran A. D. Moy A. Landais J. R. McConnell T. J. Popp E. Le Meur X. Faïn J. Chappellaz |
author_sort |
A. P. M. Servettaz |
title |
A 2000-year temperature reconstruction on the East Antarctic plateau from argon–nitrogen and water stable isotopes in the Aurora Basin North ice core |
title_short |
A 2000-year temperature reconstruction on the East Antarctic plateau from argon–nitrogen and water stable isotopes in the Aurora Basin North ice core |
title_full |
A 2000-year temperature reconstruction on the East Antarctic plateau from argon–nitrogen and water stable isotopes in the Aurora Basin North ice core |
title_fullStr |
A 2000-year temperature reconstruction on the East Antarctic plateau from argon–nitrogen and water stable isotopes in the Aurora Basin North ice core |
title_full_unstemmed |
A 2000-year temperature reconstruction on the East Antarctic plateau from argon–nitrogen and water stable isotopes in the Aurora Basin North ice core |
title_sort |
2000-year temperature reconstruction on the east antarctic plateau from argon–nitrogen and water stable isotopes in the aurora basin north ice core |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/cp-19-1125-2023 https://doaj.org/article/116f2309d61f449ca1e8657186e198e1 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica ice core |
op_source |
Climate of the Past, Vol 19, Pp 1125-1152 (2023) |
op_relation |
https://cp.copernicus.org/articles/19/1125/2023/cp-19-1125-2023.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-19-1125-2023 1814-9324 1814-9332 https://doaj.org/article/116f2309d61f449ca1e8657186e198e1 |
op_doi |
https://doi.org/10.5194/cp-19-1125-2023 |
container_title |
Climate of the Past |
container_volume |
19 |
container_issue |
6 |
container_start_page |
1125 |
op_container_end_page |
1152 |
_version_ |
1770275015370997760 |