Proxy benchmarks for intercomparison of 8.2 ka simulations
The Paleoclimate Modelling Intercomparison Project (PMIP3) now includes the 8.2 ka event as a test of model sensitivity to North Atlantic freshwater forcing. To provide benchmarks for intercomparison, we compiled and analyzed high-resolution records spanning this event. Two previously-described anom...
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ftcopernicus:oai:publications.copernicus.org:cp16570 2023-05-15T17:29:09+02:00 Proxy benchmarks for intercomparison of 8.2 ka simulations Morrill, C. Anderson, D. M. Bauer, B. A. Buckner, R. Gille, E. P. Gross, W. S. Hartman, M. Shah, A. 2018-09-27 application/pdf https://doi.org/10.5194/cp-9-423-2013 https://cp.copernicus.org/articles/9/423/2013/ eng eng doi:10.5194/cp-9-423-2013 https://cp.copernicus.org/articles/9/423/2013/ eISSN: 1814-9332 Text 2018 ftcopernicus https://doi.org/10.5194/cp-9-423-2013 2020-07-20T16:25:34Z The Paleoclimate Modelling Intercomparison Project (PMIP3) now includes the 8.2 ka event as a test of model sensitivity to North Atlantic freshwater forcing. To provide benchmarks for intercomparison, we compiled and analyzed high-resolution records spanning this event. Two previously-described anomaly patterns that emerge are cooling around the North Atlantic and drier conditions in the Northern Hemisphere tropics. Newer to this compilation are more robustly-defined wetter conditions in the Southern Hemisphere tropics and regionally-limited warming in the Southern Hemisphere. Most anomalies around the globe lasted on the order of 100 to 150 yr. More quantitative reconstructions are now available and indicate cooling of ~ 1 °C and a ~ 20% decrease in precipitation in parts of Europe as well as spatial gradients in δ 18 O from the high to low latitudes. Unresolved questions remain about the seasonality of the climate response to freshwater forcing and the extent to which the bipolar seesaw operated in the early Holocene. Text North Atlantic Copernicus Publications: E-Journals Climate of the Past 9 1 423 432 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The Paleoclimate Modelling Intercomparison Project (PMIP3) now includes the 8.2 ka event as a test of model sensitivity to North Atlantic freshwater forcing. To provide benchmarks for intercomparison, we compiled and analyzed high-resolution records spanning this event. Two previously-described anomaly patterns that emerge are cooling around the North Atlantic and drier conditions in the Northern Hemisphere tropics. Newer to this compilation are more robustly-defined wetter conditions in the Southern Hemisphere tropics and regionally-limited warming in the Southern Hemisphere. Most anomalies around the globe lasted on the order of 100 to 150 yr. More quantitative reconstructions are now available and indicate cooling of ~ 1 °C and a ~ 20% decrease in precipitation in parts of Europe as well as spatial gradients in δ 18 O from the high to low latitudes. Unresolved questions remain about the seasonality of the climate response to freshwater forcing and the extent to which the bipolar seesaw operated in the early Holocene. |
format |
Text |
author |
Morrill, C. Anderson, D. M. Bauer, B. A. Buckner, R. Gille, E. P. Gross, W. S. Hartman, M. Shah, A. |
spellingShingle |
Morrill, C. Anderson, D. M. Bauer, B. A. Buckner, R. Gille, E. P. Gross, W. S. Hartman, M. Shah, A. Proxy benchmarks for intercomparison of 8.2 ka simulations |
author_facet |
Morrill, C. Anderson, D. M. Bauer, B. A. Buckner, R. Gille, E. P. Gross, W. S. Hartman, M. Shah, A. |
author_sort |
Morrill, C. |
title |
Proxy benchmarks for intercomparison of 8.2 ka simulations |
title_short |
Proxy benchmarks for intercomparison of 8.2 ka simulations |
title_full |
Proxy benchmarks for intercomparison of 8.2 ka simulations |
title_fullStr |
Proxy benchmarks for intercomparison of 8.2 ka simulations |
title_full_unstemmed |
Proxy benchmarks for intercomparison of 8.2 ka simulations |
title_sort |
proxy benchmarks for intercomparison of 8.2 ka simulations |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-9-423-2013 https://cp.copernicus.org/articles/9/423/2013/ |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-9-423-2013 https://cp.copernicus.org/articles/9/423/2013/ |
op_doi |
https://doi.org/10.5194/cp-9-423-2013 |
container_title |
Climate of the Past |
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9 |
container_issue |
1 |
container_start_page |
423 |
op_container_end_page |
432 |
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1766122759504527360 |