North Atlantic Oscillation polarity during the past 3000 years derived from sediments of a large lowland lake, Schweriner See, in NE Germany

• Published in: Climate of the Past
• Main Authors: Adolph, Marie-Luise, Czerwiński, Sambor, Dreßler, Mirko, Strobel, Paul, Bliedtner, Marcel, Lorenz, Sebastian, Debret, Maxime, Haberzettl, Torsten
• Format: Text
• Language: English
• Published: 2024
• Subjects: North Atlantic; North Atlantic oscillation
• Online Access: https://doi.org/10.5194/cp-20-2143-2024; https://cp.copernicus.org/articles/20/2143/2024/

Based on a multi-dating and multi-proxy approach, we reconstruct Late Holocene environmental changes derived from sediments of Schweriner See, a large lowland lake in NE Germany, covering the past 3070 + 170 / - 210 <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="47pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="373ea64e249a29d29f3b6989e12b1fa9"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cp-20-2143-2024-ie00001.svg" width="47pt" height="16pt" src="cp-20-2143-2024-ie00001.png"/> </svg:svg> years cal BP. We infer variations in large-scale atmospheric circulation systems by combining in-lake productivity indicators obtained from traditional and high-resolution techniques (e.g. LOI 550 , TOC, inc / <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="8pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="e653eaf840568ee76bb20ba3bf368ae0"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cp-20-2143-2024-ie00002.svg" width="8pt" height="14pt" src="cp-20-2143-2024-ie00002.png"/> </svg:svg> coh), diatom assemblages, and compound-specific hydrogen isotopes ( δ 2 H C 25 <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="15pt" height="10pt" class="svg-formula" dspmath="mathimg" md5hash="0106675a12b023c3f74f9d87fa49a36c"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cp-20-2143-2024-ie00003.svg" width="15pt" height="10pt" src="cp-20-2143-2024-ie00003.png"/> </svg:svg> ). Before 105 +95 / −75 cal BP ( ∼1850 CE), changes in productivity and the occurrence or disappearance of the diatom species Stephanocostis chantaicus reflect winter temperature variability, while variations in the compound-specific hydrogen isotopes suggest changes in the moisture source region. We observe distinct variations between (i) milder winter temperatures with a moisture source region in the southern–central North Atlantic and (ii) colder winter temperatures with a moisture source in the northern ...