Coralline alga reveals first marine record of subarctic North Pacific climate change.

Halfar, J., Steneck, R., Schöne, B., Moore, G. W. K., Joachimski, M., Kronz, A., Fietzke, Jan and Estes, J. (2007) Coralline alga reveals first marine record of subarctic North Pacific climate change. Open Access Geophysical Research Letters, 34 . L07702. DOI 10.1029/2006GL028811.

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While recent changes in subarctic North Pacific climate had dramatic effects on ecosystems and fishery yields, past climate dynamics and teleconnection patterns are poorly understood due to the absence of century-long high-resolution marine records. We present the first 117-year long annually resolved marine climate history from the western Bering Sea/Aleutian Island region using information contained in the calcitic skeleton of the long-lived crustose coralline red alga Clathromorphum nereostratum, a previously unused climate archive. The skeletal δ18O-time series indicates significant warming and/or freshening of surface waters after the middle of the 20th century. Furthermore, the time series is spatiotemporally correlated with Pacific Decadal Oscillation (PDO) and tropical El Niño-Southern Oscillation (ENSO) indices. Even though the western Bering Sea/Aleutian Island region is believed to be outside the area of significant marine response to ENSO, we propose that an ENSO signal is transmitted via the Alaskan Stream from the Eastern North Pacific, a region of known ENSO teleconnections.

Document Type: Article
Keywords: proxy archive, teleconnections, coralline red algae
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/2006GL028811
ISSN: 0094-8276
Projects: Future Ocean
Date Deposited: 03 Dec 2008 16:51
Last Modified: 08 Nov 2017 13:48

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