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| Titel |
Relationship between Holocene climate variations over southern Greenland and eastern Baffin Island and synoptic circulation pattern |
| VerfasserIn |
B. Fréchette, A. Vernal |
| 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 ; 5, no. 3 ; Nr. 5, no. 3 (2009-07-14), S.347-359 |
| Datensatznummer |
250002538
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| Publikation (Nr.) |
 copernicus.org/cp-5-347-2009.pdf |
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| Zusammenfassung |
| Lake pollen records from southwest Greenland and eastern Baffin Island show
strong regionalism in climate trends of the last 7000 cal years. July
surface air temperature reconstructions from pollen indicate larger
amplitude cooling in southwest Greenland (>3.0°C) than in eastern
Baffin Island (<1.0°C). This west-east gradient in climate change is
consistent with August sea-surface temperature reconstructions from dinocyst
records that indicate decreasing temperature and/or strength of the North
Atlantic Current to the east during the Holocene while the eastern Canadian
margins under the Labrador Current influence display slight warming.
Complementary to air and sea-surface temperature records, the lake pollen
data led to reconstruct increased cloudiness in southern Greenland, which
points to increasing cyclonic activity since 7000 cal years BP west of
Greenland. Together, the terrestrial and marine records of the northwest
North Atlantic therefore suggest a shift from a dominant NAO+ during the
early-mid Holocene to dominant NAO- in the late Holocene. |
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