North Icelandic Shelf Arctica islandica Shell Measurement 1357 Year Record Butler, P.G.; Wanamaker, A.D.; Scourse, J.D.; Richardson, C.A.; Reynolds, D.J. Butler, P.G. Wanamaker, A.D. Scourse, J.D. Richardson, C.A. Reynolds, D.J. Meridional Overturning Circulation (MOC) earth science/paleoclimate/paleoceanography (growth rate,null,average correlation coefficient,dimensionless,null,paleoceanography,null,null,N,standard deviation of Rbar) earth science/paleoclimate/paleoceanography (number of samples,null,null,count,null,paleoceanography,null,null,N,number of Arctica Islandica time series used in EPS calculation) earth science/paleoclimate/paleoceanography (growth rate,bivalve,null,micrometer,null,paleoceanography,averaged,null,N,Arctica islandica hinge plate region) earth science/paleoclimate/paleoceanography (number of samples,null,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (growth rate,bivalve,null,year,null,paleoceanography,averaged,null,N,Arctica islandica) earth science/paleoclimate/paleoceanography (growth rate,bivalve,null,micrometer,null,paleoceanography,averaged,null,N,Arctica islandica outer shell margin) earth science/paleoclimate/paleoceanography (age,bivalve,null,year,null,paleoceanography,averaged,null,N,Arctica islandica sample age) earth science/paleoclimate/paleoceanography (age,bivalve,null,year,null,paleoceanography,null,null,N,Arctica islandica lifetime) earth science/paleoclimate/paleoceanography (age,null,null,year,null,paleoceanography,null,null,N,biological age) earth science/paleoclimate/paleoceanography (growth rate,bivalve,null,micrometer,null,paleoceanography,smoothed,null,N,Arctica islandica hinge plate region; smoothed with 88-year spline) earth science/paleoclimate/paleoceanography (age,bivalve,null,year Common Era,null,paleoceanography,null,null,N,Arctica islandica first year) earth science/paleoclimate/paleoceanography (growth rate,null,average correlation coefficient,dimensionless,null,paleoceanography,null,null,N,mean of all correlations between pairs of increment-width series of Arctica islandica) earth science/paleoclimate/paleoceanography (growth rate,null,expressed population signal,dimensionless,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (growth rate,bivalve,null,micrometer,null,paleoceanography,null,null,N,Arctica islandica unspecified measurement) earth science/paleoclimate/paleoceanography (growth rate,bivalve,null,micrometer,null,paleoceanography,smoothed,null,N,Arctica islandica outer shell margin; smoothed with 88-year spline) earth science/paleoclimate/paleoceanography (organic carbon,bivalve,null,dimensionless,null,paleoceanography,detrended|normalized,null,N,Arctica islandica; regional curve standardization; autoregressively modelled version from ARSTAN) earth science/paleoclimate/paleoceanography (age,null,null,year Common Era,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (number of samples,null,null,count,null,paleoceanography,null,null,N,number of correlations used in Rbar calculation) earth science/paleoclimate/paleoceanography (growth rate,null,average correlation coefficient,dimensionless,null,paleoceanography,null,null,N,one standard error of Rbar) earth science/paleoclimate/paleoceanography (organic carbon,bivalve,null,dimensionless,null,paleoceanography,detrended,null,N,Arctica islandica; negative exponential function; autoregressively modelled version from ARSTAN) earth science/paleoclimate/paleoceanography (sample identification,null,null,null,null,paleoceanography,null,null,N,shell number) earth science/paleoclimate/paleoceanography (age,bivalve,null,year Common Era,null,paleoceanography,null,null,N,Arctica islandica last year) earth science/paleoclimate/paleocean (Trawl B05AD03>LATITUDE 66.5265>LONGITUDE -18.1957) Despite numerous investigations, the dynamical origins of the Medieval Climate Anomaly and the Little Ice Age remain uncertain. A major unresolved issue relating to internal climate dynamics is the mode and tempo of Atlantic meridional overturning circulation variability, and the significance of decadal-to-centennial scale changes in Atlantic meridional overturning circulation strength in regulating the climate of the last millennium. Here we use the time-constrained high-resolution local radiocarbon reservoir age offset derived from an absolutely dated annually resolved shell chronology spanning the past 1,350 years, to reconstruct changes in surface ocean circulation and climate. The water mass tracer data presented here from the North Icelandic shelf, combined with previously published data from the Arctic and subtropical Atlantic, show that surface Atlantic meridional overturning circulation dynamics likely amplified the relatively warm conditions during the Medieval Climate Anomaly and the relatively cool conditions during the Little Ice Age within the North Atlantic sector. STUDY NOTES: Raw measurements of increment widths from shells of the bivalve Arctica islandica; absolute dates of birth and death derived by crossdating; chronologies derived from a mean value function of the detrended increment widths, and supplementary data associated with the chronologies and presented in the paper. Keyword: Sclerochronology NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Butler, P.G. Investigator : Wanamaker, A.D. Investigator : Scourse, J.D. Investigator : Richardson, C.A. Investigator : Reynolds, D.J. 2013-06-24 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/14609 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-chron.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-lifetimes.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-raw.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-stats-ne.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-seg-length.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-rcs.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-stats-rcs-h.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-stats-rcs-m.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-chron.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-lifetimes.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-raw.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-stats-ne.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-seg-length.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-rcs.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-stats-rcs-h.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-stats-rcs-m.txt English https://www.ncdc.noaa.gov/paleo/study/14609 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-chron.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-lifetimes.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-raw.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-stats-ne.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-seg-length.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-rcs.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-stats-rcs-h.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2013/butler2013-stats-rcs-m.txt Butler, P.G., A.D. Wanamaker Jr., J.D. Scourse, C.A. Richardson and D.J. Reynolds. 2013. Variability of marine climate on the North Icelandic Shelf in a 1357-year proxy archive based on growth increments in the bivalve Arctica islandica. Palaeogeography, Palaeoclimatology, Palaeoecology, 373, 141-151. DOI: 10.1016/j.palaeo.2012.01.016 Wanamaker, A.D., P.G. Butler, J.D. Scourse, J. Heinemeier, J. Eiríksson, K.L. Knudsen, and C.A. Richardson. 2012. Surface changes in the North Atlantic meridional overturning circulation during the last millennium. Nature Communications, Published 12 Jun 2012. DOI: 10.1038/ncomms1901 START YEAR: 649 AD * END YEAR: 2005 AD -18.1957 66.5265 -18.1957 66.5265