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Annually resolved proxy records from marine archives provide valuable insight into this variability, but are especially rare from high latitude environments, particularly for centennial timescales. We constructed continuous, absolutely dated records of shell growth (1449\u20132014 CE; 564\u00a0years) and oxygen isotope ratios (\u03b4<jats:sup>18<\/jats:sup>O<jats:sub>shell<\/jats:sub>; 1539\u20132014 CE; 476\u00a0years) from shells of the bivalve <jats:italic>Arctica islandica<\/jats:italic> from coastal northern Norway, a location sensitive to large\u2010scale North Atlantic Ocean dynamics. An annual (January\u2013December) SST reconstruction derived from \u03b4<jats:sup>18<\/jats:sup>O<jats:sub>shell<\/jats:sub> for the past five centuries suggests an increase of at least 2\u00b0C from the mid\u201018th century to 2014. The SST reconstruction correlates significantly with instrumental records and with other proxy reconstructions in the southern Barents Sea region. Spectral analysis of the shell growth and isotope records supports evidence for Atlantic multidecadal variability (65\u201380\u00a0year periodicity) extending into polar and subpolar latitudes for the past five centuries. These results provide additional evidence that multidecadal variability in SSTs are a persistent feature of the North Atlantic marine system.<\/jats:p>","DOI":"10.1029\/2020jc017074","type":"journal-article","created":{"date-parts":[[2021,6,10]],"date-time":"2021-06-10T19:02:02Z","timestamp":1623351722000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Persistent Multidecadal Variability Since the 15th Century in the Southern Barents Sea Derived From Annually Resolved Shell\u2010Based Records"],"prefix":"10.1029","volume":"126","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4504-8847","authenticated-orcid":false,"given":"Madelyn J.","family":"Mette","sequence":"first","affiliation":[{"name":"U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center  St. Petersburg FL USA"},{"name":"Department of Geological and Atmospheric Sciences Iowa State University  Ames IA USA"},{"name":"NORCE Norwegian Research Centre Bjerknes Centre for Climate Research  Bergen Norway"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6560-6420","authenticated-orcid":false,"suffix":"Jr","given":"Alan D.","family":"Wanamaker","sequence":"additional","affiliation":[{"name":"Department of Geological and Atmospheric Sciences Iowa State University  Ames IA USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5341-0711","authenticated-orcid":false,"given":"Michael J.","family":"Retelle","sequence":"additional","affiliation":[{"name":"Department of Geology Bates College  Lewiston ME USA"},{"name":"University Centre in Svalbard  Longyearbyen Norway"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1530-6016","authenticated-orcid":false,"given":"Michael L.","family":"Carroll","sequence":"additional","affiliation":[{"name":"Akvaplan\u2010niva FRAM\u2013High North Research Centre for Climate and the Environment  Troms\u00f8 Norway"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7113-6066","authenticated-orcid":false,"given":"Carin","family":"Andersson","sequence":"additional","affiliation":[{"name":"NORCE Norwegian Research Centre Bjerknes Centre for Climate Research  Bergen Norway"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0709-7779","authenticated-orcid":false,"suffix":"Jr","given":"William G.","family":"Ambrose","sequence":"additional","affiliation":[{"name":"School of the Coastal Environment Coastal Carolina University  Conway SC USA"}]}],"member":"13","published-online":{"date-parts":[[2021,6,21]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jmarsys.2013.07.017"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1002\/joc.5801"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1175\/JCLI-D-11-00466.1"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1029\/2020GL088036"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.seares.2018.09.016"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00227-017-3144-7"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1038\/22504"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1098\/rsbl.2018.0665"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1111\/gcb.13256"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jmarsys.2017.11.005"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.5670\/oceanog.1991.07"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.97.4.1339"},{"key":"e_1_2_9_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.quascirev.2009.07.010"},{"key":"e_1_2_9_15_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.palaeo.2012.01.016"},{"key":"e_1_2_9_16_1","doi-asserted-by":"publisher","DOI":"10.1175\/BAMS-D-13-00177.1"},{"key":"e_1_2_9_17_1","doi-asserted-by":"publisher","DOI":"10.1002\/2015JC011012"},{"key":"e_1_2_9_18_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.aab3980"},{"key":"e_1_2_9_19_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.aaf2575"},{"volume-title":"A time\u2010series analysis approach to tree\u2010ring standardization","year":"1985","author":"Cook E. 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