The micropaleontological and isotopic perspective of surface water mass variability in the NE Atlantic from MIS 6-5e (188-115 ka) ...

• Main Authors: Rashid, Harunur, Zeng, Min, Chen, Jiaxin
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Mid-Atlantic Ridge; Northeast Atlantic
• Online Access: https://dx.doi.org/10.57757/iugg23-3729; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020814

<!--!introduction!--> The penultimate deglaciation hosts one of the most rapid oceanographic changes compared to the last deglaciation. Further, the European ice sheets attained a regionally extreme extent during the MIS6 compared to the MIS2. This study reconstructed changes in the near-surface and thermocline in the central to northeast Atlantic by analyzing sediments from two IODP sites, U1313 and U1314, drilled on the eastern flank of the mid-Atlantic ridge and Gardar Drift, respectively. Planktonic foraminiferal assemblages, ice-rafted detritus, and oxygen isotopes in Globigerina bulloides and Globorotalia inflata from MIS6 to 5e were analyzed . Warmer and colder sea-surface conditions were marked by a change in the relative abundance of polar, subpolar, and transitional planktonic foraminifers. Oxygen isotopes in G. bulloides and G. inflata suggest that the thermocline deepened at the subtropical Site U1313 during MIS6. The lack of Globorotalia inflata prevented us from profiling the mixed layer ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...