Ezat M.MRasmussen T.LHönisch BJEROEN GROENEVELDDemenocal P.2022-11-112022-11-11201720411723https://www.scopus.com/inward/record.uri?eid=2-s2.0-85013627866&doi=10.1038%2fncomms14498&partnerID=40&md5=88da8d3a42c66e4677619c4eb6938ce5https://scholars.lib.ntu.edu.tw/handle/123456789/624761Antarctic ice cores document glacial-interglacial and millennial-scale variability in atmospheric pCO 2 over the past 800 kyr. The ocean, as the largest active carbon reservoir on this timescale, is thought to have played a dominant role in these pCO 2 fluctuations, but it remains unclear how and where in the ocean CO 2 was stored during glaciations and released during (de)glacial millennial-scale climate events. The evolution of surface ocean pCO 2 in key locations can therefore provide important clues for understanding the ocean's role in Pleistocene carbon cycling. Here we present a 135-kyr record of shallow subsurface pCO 2 and nutrient levels from the Norwegian Sea, an area of intense CO 2 uptake from the atmosphere today. Our results suggest that the Norwegian Sea probably acted as a CO 2 source towards the end of Heinrich stadials HS1, HS4 and HS11, and may have contributed to the increase in atmospheric pCO 2 at these times. ©The Author(s) 2017.[SDGs]SDG14carbon cycle; carbon dioxide; glacial-interglacial cycle; glaciation; Heinrich event; ice core; interstadial; latitude; Pleistocene; timescale; Atlantic Ocean; atmosphere; latitude; nutrient; Arctic Ocean; Atlantic Ocean; Atlantic Ocean (North); Norwegian Seajournal article10.1038/ncomms14498282249852-s2.0-85013627866