Master Shell Growth Chronology from the Gulf of Maine 1762-2013 AD Wanamaker, A.D.; Kreutz, K.J.; Introne, D.S. Wanamaker, A.D. Kreutz, K.J. Introne, D.S. earth science/paleoclimate/paleoceanography (growth rate,bivalve,null,standard deviation unit,null,paleoceanography,detrended,null,N,Arctica islandica) earth science/paleoclimate/paleoceanography (number of samples,null,null,count,null,paleoceanography,null,null,N,number of Arctica islandica shells in chronology by year) earth science/paleoclimate/paleoceanography (age,null,null,year Common Era,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (Sequin Island>LATITUDE 43.714151>LONGITUDE -69.751652) STUDY NOTES: Live and dead Arctica islandica shells were collected in 2010, 2011, 2012 and 2014. All shell material is archived and stored at Iowa State University. A cross section of shell along the maximum growth axis was embedded in clear epoxy (Beulher Epoxicure resin and hardener) before sectioning the embedded shell along the maximum growth axis. One of the two mirrored surface shell cross sectioned blocks was used for crossdating chronology work while the other was saved for later geochemical analysis. To obtain the clearest view of the growth increments, the cross sectioned shell surface was polished with five silicon carbide grinding paper levels (120, 400, 600, 800, 1200). Photographs of acetate peels and measurements of shell increments were completed at Iowa State University using a uEye camera and Buelher’s OmniMet v9.5. Prior to measuring the thickness of annual increments, individual shell increments were visually inspected and temporally aligned using several visual crossdating techniques (marker years, modified list method, and skeleton plots). Visual crossdating was statistically verified using SHELLCORR and COFECHA. If either program flagged a potential problem, the increments in question were visually inspected. Measurement series were only changed if an error from measuring or visual crossdating was clearly visible upon reinspection. Applying these techniques of crossdating sclerochronological archives resulted in precisely dated and a highly replicated master shell chronology (average expressed population signal = 0.94; series intercorrelation =0.76) from a site within the central Gulf of Maine (northwestern Atlantic Ocean). Arctica islandica growth-increment chronologies were developed with program ARSTAN: http://www.ldeo.columbia.edu/res/fac/trl/public/publicSoftware.html and detrended using appropriate standardization for each data set Authors (Exactly as written in the publication citation) (cubic splines, negative exponential, or linear regression with negative or 0 slope). The "standard" chronology from ARSTAN is reported. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Wanamaker, A.D. Investigator : Kreutz, K.J. Investigator : Introne, D.S. 2015-12-10 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/19563 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/wanamaker2015/wanamaker2015.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/wanamaker2015/wanamaker2015.txt English https://www.ncdc.noaa.gov/paleo/study/19563 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/wanamaker2015/wanamaker2015.txt Wanamaker, Alan, Karl Kreutz, and Douglas Introne2015Master Shell Growth Chronology from the Gulf of MaineUnpublished Data Griffin, S.M.2012Applying dendrochronology visual crossdating techniques to the marine bivalve Arctica islandica and assessing the utility of master growth chronologies as proxies for temperature and secondary productivity in the Gulf of MaineThesis START YEAR: 1762 AD * END YEAR: 2013 AD -69.751652 43.714151 -69.751652 43.714151