CAGE-Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geosciences, UiT The Arctic University of Norway, 9037 Tromsø, Norway.
Department of Geology, Faculty of Science, Beni-Suef University, Beni-Suef 62511, Egypt.
Nat Commun. 2017 Feb 22;8:14498. doi: 10.1038/ncomms14498.
Antarctic ice cores document glacial-interglacial and millennial-scale variability in atmospheric pCO 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 fluctuations, but it remains unclear how and where in the ocean CO was stored during glaciations and released during (de)glacial millennial-scale climate events. The evolution of surface ocean pCO 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 and nutrient levels from the Norwegian Sea, an area of intense CO uptake from the atmosphere today. Our results suggest that the Norwegian Sea probably acted as a CO source towards the end of Heinrich stadials HS1, HS4 and HS11, and may have contributed to the increase in atmospheric pCO at these times.
南极冰芯记录了过去 800 千年来大气 pCO2 在冰期-间冰期和千年尺度上的变化。海洋作为这个时间尺度上最大的活跃碳库，被认为在这些 pCO2 波动中发挥了主导作用，但目前仍不清楚在冰期和（去）冰期千年尺度气候事件期间，海洋中的 CO 是如何以及在何处储存和释放的。因此，关键地点表层海洋 pCO2 的演化可以为理解海洋在更新世碳循环中的作用提供重要线索。本文展示了来自挪威海的 13.5 万年浅表层 pCO2 和营养物水平的记录，挪威海是目前大气中 CO2 强烈吸收的区域。研究结果表明，在 Heinrich 盛冰期 HS1、HS4 和 HS11 末期，挪威海可能充当了 CO2 的源，并且可能导致了这些时期大气中 pCO2 的增加。
