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| Titel |
Holocene trends in the foraminifer record from the Norwegian Sea and the North Atlantic Ocean |
| VerfasserIn |
C. Andersson, F. S. R. Pausata, E. Jansen, B. Risebrobakken, R. J. Telford |
| 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 ; 6, no. 2 ; Nr. 6, no. 2 (2010-03-30), S.179-193 |
| Datensatznummer |
250003443
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| Publikation (Nr.) |
 copernicus.org/cp-6-179-2010.pdf |
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| Zusammenfassung |
| The early to mid-Holocene thermal optimum is a well-known feature in a wide
variety of paleoclimate archives from the Northern Hemisphere. Reconstructed
summer temperature anomalies from across northern Europe show a clear
maximum around 6000 years before present (6 ka). For the marine realm, Holocene trends in sea-surface
temperature reconstructions for the North Atlantic and Norwegian Sea do not
exhibit a consistent pattern of early to mid-Holocene warmth. Sea-surface
temperature records based on alkenones and diatoms generally show the
existence of a warm early to mid-Holocene optimum. In contrast, several
foraminifer and radiolarian based temperature records from the North
Atlantic and Norwegian Sea show a cool mid-Holocene anomaly and a trend
towards warmer temperatures in the late Holocene. In this paper, we revisit
the foraminifer record from the Vøring Plateau in the Norwegian Sea. We
also compare this record with published foraminifer based temperature
reconstructions from the North Atlantic and with modelled (CCSM3) upper
ocean temperatures. Model results indicate that while the seasonal summer
warming of the sea-surface was stronger during the mid-Holocene, sub-surface
depths experienced a cooling. This hydrographic setting can explain the
discrepancies between the Holocene trends exhibited by phytoplankton and
zooplankton based temperature proxy records. |
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