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| Titel |
Proxy benchmarks for intercomparison of 8.2 ka simulations |
| VerfasserIn |
C. Morrill, D. M. Anderson, B. A. Bauer, R. Buckner, E. P. Gille, W. S. Gross, M. Hartman, A. Shah |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 9, no. 1 ; Nr. 9, no. 1 (2013-02-19), S.423-432 |
| Datensatznummer |
250017446
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| Publikation (Nr.) |
 copernicus.org/cp-9-423-2013.pdf |
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| Zusammenfassung |
| 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 δ18O 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. |
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