Holocene thermal maximum in the western Arctic (0-180°W)
The spatio-temporal pattern of peak Holocene warmth (Holocene thermal maximum, HTM) is traced over 140 sites across the Western Hemisphere of the Arctic (0–180°W; north of ~60°N). Paleoclimate inferences based on a wide variety of proxy indicators provide clear evidence for warmer-than-present condi...
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ftsouthampton:oai:eprints.soton.ac.uk:15519 2023-07-30T04:00:04+02:00 Holocene thermal maximum in the western Arctic (0-180°W) Kaufman, D.S. Ager, T.A. Anderson, N.J. Anderson, P.M. Andrews, J.T. Bartlein, P.J. Brubaker, L.B. Coats, L.L. Cwynar, L.C. Duvall, M.L. Dyke, A.S. Edwards, M.E. Eisner, W.R. Gajewski, K. Geirsdottir, A. Hu, F.S. Jennings, A.E. Kaplan, M.R. Kerwin, M.W. Lozhkin, A.V. MacDonald, G.M. Miller, G.H. Mock, C.J. Oswald, W.W. Otto-Bliesner, B.L. Porinchu,, D.F. Ruhland, K. Smol, J.P. Steig, E.J. Wolfe, B.B. 2004 https://eprints.soton.ac.uk/15519/ unknown Kaufman, D.S., Ager, T.A., Anderson, N.J., Anderson, P.M., Andrews, J.T., Bartlein, P.J., Brubaker, L.B., Coats, L.L., Cwynar, L.C., Duvall, M.L., Dyke, A.S., Edwards, M.E., Eisner, W.R., Gajewski, K., Geirsdottir, A., Hu, F.S., Jennings, A.E., Kaplan, M.R., Kerwin, M.W., Lozhkin, A.V., MacDonald, G.M., Miller, G.H., Mock, C.J., Oswald, W.W., Otto-Bliesner, B.L., Porinchu,, D.F., Ruhland, K., Smol, J.P., Steig, E.J. and Wolfe, B.B. (2004) Holocene thermal maximum in the western Arctic (0-180°W). Quaternary Science Reviews, 23 (5-6), 529-560. (doi:10.1016/j.quascirev.2003.09.007 <http://dx.doi.org/10.1016/j.quascirev.2003.09.007>). Article PeerReviewed 2004 ftsouthampton https://doi.org/10.1016/j.quascirev.2003.09.007 2023-07-09T20:33:11Z The spatio-temporal pattern of peak Holocene warmth (Holocene thermal maximum, HTM) is traced over 140 sites across the Western Hemisphere of the Arctic (0–180°W; north of ~60°N). Paleoclimate inferences based on a wide variety of proxy indicators provide clear evidence for warmer-than-present conditions at 120 of these sites. At the 16 terrestrial sites where quantitative estimates have been obtained, local HTM temperatures (primarily summer estimates) were on average 1.6±0.8°C higher than present (approximate average of the 20th century), but the warming was time-transgressive across the western Arctic. As the precession-driven summer insolation anomaly peaked 12–10 ka (thousands of calendar years ago), warming was concentrated in northwest North America, while cool conditions lingered in the northeast. Alaska and northwest Canada experienced the HTM between ca 11 and 9 ka, about 4000 yr prior to the HTM in northeast Canada. The delayed warming in Quebec and Labrador was linked to the residual Laurentide Ice Sheet, which chilled the region through its impact on surface energy balance and ocean circulation. The lingering ice also attests to the inherent asymmetry of atmospheric and oceanic circulation that predisposes the region to glaciation and modulates the pattern of climatic change. The spatial asymmetry of warming during the HTM resembles the pattern of warming observed in the Arctic over the last several decades. Although the two warmings are described at different temporal scales, and the HTM was additionally affected by the residual Laurentide ice, the similarities suggest there might be a preferred mode of variability in the atmospheric circulation that generates a recurrent pattern of warming under positive radiative forcing. Unlike the HTM, however, future warming will not be counterbalanced by the cooling effect of a residual North American ice sheet. Article in Journal/Newspaper Arctic Arctic Ice Sheet Alaska University of Southampton: e-Prints Soton Arctic Canada Quaternary Science Reviews 23 5-6 529 560 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
The spatio-temporal pattern of peak Holocene warmth (Holocene thermal maximum, HTM) is traced over 140 sites across the Western Hemisphere of the Arctic (0–180°W; north of ~60°N). Paleoclimate inferences based on a wide variety of proxy indicators provide clear evidence for warmer-than-present conditions at 120 of these sites. At the 16 terrestrial sites where quantitative estimates have been obtained, local HTM temperatures (primarily summer estimates) were on average 1.6±0.8°C higher than present (approximate average of the 20th century), but the warming was time-transgressive across the western Arctic. As the precession-driven summer insolation anomaly peaked 12–10 ka (thousands of calendar years ago), warming was concentrated in northwest North America, while cool conditions lingered in the northeast. Alaska and northwest Canada experienced the HTM between ca 11 and 9 ka, about 4000 yr prior to the HTM in northeast Canada. The delayed warming in Quebec and Labrador was linked to the residual Laurentide Ice Sheet, which chilled the region through its impact on surface energy balance and ocean circulation. The lingering ice also attests to the inherent asymmetry of atmospheric and oceanic circulation that predisposes the region to glaciation and modulates the pattern of climatic change. The spatial asymmetry of warming during the HTM resembles the pattern of warming observed in the Arctic over the last several decades. Although the two warmings are described at different temporal scales, and the HTM was additionally affected by the residual Laurentide ice, the similarities suggest there might be a preferred mode of variability in the atmospheric circulation that generates a recurrent pattern of warming under positive radiative forcing. Unlike the HTM, however, future warming will not be counterbalanced by the cooling effect of a residual North American ice sheet. |
format |
Article in Journal/Newspaper |
author |
Kaufman, D.S. Ager, T.A. Anderson, N.J. Anderson, P.M. Andrews, J.T. Bartlein, P.J. Brubaker, L.B. Coats, L.L. Cwynar, L.C. Duvall, M.L. Dyke, A.S. Edwards, M.E. Eisner, W.R. Gajewski, K. Geirsdottir, A. Hu, F.S. Jennings, A.E. Kaplan, M.R. Kerwin, M.W. Lozhkin, A.V. MacDonald, G.M. Miller, G.H. Mock, C.J. Oswald, W.W. Otto-Bliesner, B.L. Porinchu,, D.F. Ruhland, K. Smol, J.P. Steig, E.J. Wolfe, B.B. |
spellingShingle |
Kaufman, D.S. Ager, T.A. Anderson, N.J. Anderson, P.M. Andrews, J.T. Bartlein, P.J. Brubaker, L.B. Coats, L.L. Cwynar, L.C. Duvall, M.L. Dyke, A.S. Edwards, M.E. Eisner, W.R. Gajewski, K. Geirsdottir, A. Hu, F.S. Jennings, A.E. Kaplan, M.R. Kerwin, M.W. Lozhkin, A.V. MacDonald, G.M. Miller, G.H. Mock, C.J. Oswald, W.W. Otto-Bliesner, B.L. Porinchu,, D.F. Ruhland, K. Smol, J.P. Steig, E.J. Wolfe, B.B. Holocene thermal maximum in the western Arctic (0-180°W) |
author_facet |
Kaufman, D.S. Ager, T.A. Anderson, N.J. Anderson, P.M. Andrews, J.T. Bartlein, P.J. Brubaker, L.B. Coats, L.L. Cwynar, L.C. Duvall, M.L. Dyke, A.S. Edwards, M.E. Eisner, W.R. Gajewski, K. Geirsdottir, A. Hu, F.S. Jennings, A.E. Kaplan, M.R. Kerwin, M.W. Lozhkin, A.V. MacDonald, G.M. Miller, G.H. Mock, C.J. Oswald, W.W. Otto-Bliesner, B.L. Porinchu,, D.F. Ruhland, K. Smol, J.P. Steig, E.J. Wolfe, B.B. |
author_sort |
Kaufman, D.S. |
title |
Holocene thermal maximum in the western Arctic (0-180°W) |
title_short |
Holocene thermal maximum in the western Arctic (0-180°W) |
title_full |
Holocene thermal maximum in the western Arctic (0-180°W) |
title_fullStr |
Holocene thermal maximum in the western Arctic (0-180°W) |
title_full_unstemmed |
Holocene thermal maximum in the western Arctic (0-180°W) |
title_sort |
holocene thermal maximum in the western arctic (0-180°w) |
publishDate |
2004 |
url |
https://eprints.soton.ac.uk/15519/ |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic Arctic Ice Sheet Alaska |
genre_facet |
Arctic Arctic Ice Sheet Alaska |
op_relation |
Kaufman, D.S., Ager, T.A., Anderson, N.J., Anderson, P.M., Andrews, J.T., Bartlein, P.J., Brubaker, L.B., Coats, L.L., Cwynar, L.C., Duvall, M.L., Dyke, A.S., Edwards, M.E., Eisner, W.R., Gajewski, K., Geirsdottir, A., Hu, F.S., Jennings, A.E., Kaplan, M.R., Kerwin, M.W., Lozhkin, A.V., MacDonald, G.M., Miller, G.H., Mock, C.J., Oswald, W.W., Otto-Bliesner, B.L., Porinchu,, D.F., Ruhland, K., Smol, J.P., Steig, E.J. and Wolfe, B.B. (2004) Holocene thermal maximum in the western Arctic (0-180°W). Quaternary Science Reviews, 23 (5-6), 529-560. (doi:10.1016/j.quascirev.2003.09.007 <http://dx.doi.org/10.1016/j.quascirev.2003.09.007>). |
op_doi |
https://doi.org/10.1016/j.quascirev.2003.09.007 |
container_title |
Quaternary Science Reviews |
container_volume |
23 |
container_issue |
5-6 |
container_start_page |
529 |
op_container_end_page |
560 |
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1772810690126413824 |