Significantly warmer Arctic surface temperatures during the Pliocene indicated by multiple independent proxies
Temperatures in the Arctic have increased by an astounding 1 °C in response to anthropogenic forcing over the past 20 years and are expected to rise further in the coming decades. The Pliocene (2.6-5.3 Ma) is of particular interest as an analog for future warming because global temperatures were sig...
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ftcarletonunivir:oai:carleton.ca:23162 2023-05-15T14:43:57+02:00 Significantly warmer Arctic surface temperatures during the Pliocene indicated by multiple independent proxies Ballantyne, A.P. (A. P.) Greenwood, D.R. (D. R.) Sinninghe Damsté, J.S. (J. S.) Csank, A.Z. (A. Z.) Eberle, J.J. (J. J.) Rybczynski, N. (Natalia) 2010-07-01 https://ir.library.carleton.ca/pub/23162 https://doi.org/10.1130/G30815.1 en eng https://ir.library.carleton.ca/pub/23162 doi:10.1130/G30815.1 info:eu-repo/semantics/openAccess Geology vol. 38 no. 7, pp. 603-606 info:eu-repo/semantics/article 2010 ftcarletonunivir https://doi.org/10.1130/G30815.1 2022-02-06T21:50:13Z Temperatures in the Arctic have increased by an astounding 1 °C in response to anthropogenic forcing over the past 20 years and are expected to rise further in the coming decades. The Pliocene (2.6-5.3 Ma) is of particular interest as an analog for future warming because global temperatures were significantly warmer than today for a sustained period of time, with continental configurations similar to present. Here, we estimate mean annual temperature (MAT) based upon three independent proxies from an early Pliocene peat deposit in the Canadian High Arctic. Our proxies, including oxygen isotopes and annual ring widths (MAT =-0.5 ± 1.9 °C), coexistence of paleovegetation (MAT =-0.4 ± 4.1 °C), and bacterial tetraether composition in paleosols (MAT =-0.6 ± 5.0 °C), yield es Article in Journal/Newspaper Arctic Carleton University's Institutional Repository Arctic Geology 38 7 603 606 |
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Open Polar |
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Carleton University's Institutional Repository |
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ftcarletonunivir |
language |
English |
description |
Temperatures in the Arctic have increased by an astounding 1 °C in response to anthropogenic forcing over the past 20 years and are expected to rise further in the coming decades. The Pliocene (2.6-5.3 Ma) is of particular interest as an analog for future warming because global temperatures were significantly warmer than today for a sustained period of time, with continental configurations similar to present. Here, we estimate mean annual temperature (MAT) based upon three independent proxies from an early Pliocene peat deposit in the Canadian High Arctic. Our proxies, including oxygen isotopes and annual ring widths (MAT =-0.5 ± 1.9 °C), coexistence of paleovegetation (MAT =-0.4 ± 4.1 °C), and bacterial tetraether composition in paleosols (MAT =-0.6 ± 5.0 °C), yield es |
format |
Article in Journal/Newspaper |
author |
Ballantyne, A.P. (A. P.) Greenwood, D.R. (D. R.) Sinninghe Damsté, J.S. (J. S.) Csank, A.Z. (A. Z.) Eberle, J.J. (J. J.) Rybczynski, N. (Natalia) |
spellingShingle |
Ballantyne, A.P. (A. P.) Greenwood, D.R. (D. R.) Sinninghe Damsté, J.S. (J. S.) Csank, A.Z. (A. Z.) Eberle, J.J. (J. J.) Rybczynski, N. (Natalia) Significantly warmer Arctic surface temperatures during the Pliocene indicated by multiple independent proxies |
author_facet |
Ballantyne, A.P. (A. P.) Greenwood, D.R. (D. R.) Sinninghe Damsté, J.S. (J. S.) Csank, A.Z. (A. Z.) Eberle, J.J. (J. J.) Rybczynski, N. (Natalia) |
author_sort |
Ballantyne, A.P. (A. P.) |
title |
Significantly warmer Arctic surface temperatures during the Pliocene indicated by multiple independent proxies |
title_short |
Significantly warmer Arctic surface temperatures during the Pliocene indicated by multiple independent proxies |
title_full |
Significantly warmer Arctic surface temperatures during the Pliocene indicated by multiple independent proxies |
title_fullStr |
Significantly warmer Arctic surface temperatures during the Pliocene indicated by multiple independent proxies |
title_full_unstemmed |
Significantly warmer Arctic surface temperatures during the Pliocene indicated by multiple independent proxies |
title_sort |
significantly warmer arctic surface temperatures during the pliocene indicated by multiple independent proxies |
publishDate |
2010 |
url |
https://ir.library.carleton.ca/pub/23162 https://doi.org/10.1130/G30815.1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Geology vol. 38 no. 7, pp. 603-606 |
op_relation |
https://ir.library.carleton.ca/pub/23162 doi:10.1130/G30815.1 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1130/G30815.1 |
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Geology |
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38 |
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7 |
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606 |
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1766315531711807488 |