Bering Sea 117 Year Coralline Algae Oxygen Isotope Data Halfar, J.; Steneck, R.S.; Schöne, B.R.; Moore, G.W.K.; Joachimski, M.M.; Kronz, A.; Fietzke, J.; Estes, E.T. Halfar, J. Steneck, R.S. Schöne, B.R. Moore, G.W.K. Joachimski, M.M. Kronz, A. Fietzke, J. Estes, E.T. Pacific Decadal Oscillation earth science/paleoclimate/corals and sclerosponges (delta 18O,Clathromorphum nereostratum,null,dimensionless,null,corals and sclerosponges,normalized,null,N,coralline red algae species) earth science/paleoclimate/paleoceanography (age,null,null,year Common Era,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean (Attu>LATITUDE 52.7965>LONGITUDE 173.1799) 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 d18O-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. STUDY NOTES: 117 year oxygen isotope record of the coralline alga Clathromorphum nereostratum, collected off Attu Island in the western Aleutian Islands. C. nereostratum is a long-lived, shallow-marine crustose coralline algae. Attu Island: 52°47'N, 173°10'E NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Halfar, J. Investigator : Steneck, R.S. Investigator : Schöne, B.R. Investigator : Moore, G.W.K. Investigator : Joachimski, M.M. Investigator : Kronz, A. Investigator : Fietzke, J. Investigator : Estes, E.T. 2012-05-23 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/12944 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/halfar2007/halfar2007.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/halfar2007/halfar2007.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/halfar2007/halfar2007.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/halfar2007/halfar2007.xls English https://www.ncdc.noaa.gov/paleo/study/12944 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/halfar2007/halfar2007.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/halfar2007/halfar2007.xls Halfar, J., R. Steneck, B. Schöne, G.W.K. Moore, M. Joachimski, A. Kronz, J. Fietzke, and J. Estes. 2007. Coralline alga reveals first marine record of subarctic North Pacific climate change. Geophys. Res. Lett., 34, L07702, doi:10.1029/2006GL028811. START YEAR: 1886 AD * END YEAR: 2003 AD 173.1799 52.7965 173.1799 52.7965