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Fietzke, Jan; Ragazzola, Federica; Halfar, Jochen; Dietze, Heiner; Foster, Laura C; Hansteen, Thor H; Eisenhauer, Anton; Steneck, Robert S (2015): Seasonality in pH and temperature for shallow zones of the Bering Sea from measurements of coral Clathromorphum nereostratum. doi:10.1594/PANGAEA.843846,
Supplement to: Fietzke, J et al. (2015): Century-scale trends and seasonality in pH and temperature for shallow zones of the Bering Sea. Proceedings of the National Academy of Sciences, 201419216, doi:10.1073/pnas.1419216112

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Increasing atmospheric CO2 concentrations are potentially affecting marine ecosystems twofold, by warming and acidification. The rising amount of CO2 taken up by the ocean lowers the saturation state of calcium carbonate, complicating the formation of this key biomineral used by many marine organisms to build hard parts like skeletons or shells. Reliable time-series data of seawater pH are needed to evaluate the ongoing change and compare long-term trends and natural variability. For the high-latitude ocean, the region facing the strongest CO2 uptake, such time-series data are so far entirely lacking. Our study provides, to our knowledge, the first reconstruction of seasonal cycle and long-term trend in pH for a high-latitude ocean obtained from 2D images of stable boron isotopes from a coralline alga.
Latitude: 52.796450 * Longitude: 173.179933
Date/Time Start: 2004-08-15T00:00:00 * Date/Time End: 2004-08-15T00:00:00
Attu Island (Aleutian Islands Alaska) * Latitude: 52.796450 * Longitude: 173.179933 * Date/Time: 2004-08-15T00:00:00 * Elevation: -10.0 m * Device: Sampling by diver (DIVER)
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