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LGM and Deglacial Radiocarbon from U-series Dated Drake Passage Deep-sea Corals Data DOI: https://doi.org/10.15784/600111 Cite as Robinson, L. (2011) "LGM and Deglacial Radiocarbon from U-series Dated Drake Passage Deep-sea Corals" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/600111. AMD - DIF Record(s) NSF-ANT09-02957_1 Abstract The proposal seeks funds to continue a follow-up analytical work of deep-sea corals collected in the Drake Passage during a research cruise. The project's goal is paleo-climate research looking to constrain the depth structure and time evolution of the radiocarbon content of the Southern Ocean during the glacial and deglaciation. Radiocarbon is a versatile tracer of past climate; its radioactive decay provides an internal clock with which to assess the rates of processes, and it can be used to trace the movement of carbon through the Earth's system. It enters the ocean through air-sea gas exchange, so processes that limits this will, therefore, reduce the radiocarbon content of both surface and deep waters. The Southern Ocean is a critical location for exchange of heat and carbon between the deep-ocean and atmospheric reservoirs, and the deep waters formed there fill large volumes of the global deep and intermediate oceans. As strong currents tend to scour away sediments, carbonate preservation is limited, and radiocarbon reservoir ages are poorly constrained, many traditional paleoceanographic techniques become impractical. It is proposed to alleviate these difficulties analyzing the chemical composition of deep-sea coral skeletons. Their aragonitic skeletons can be precisely dated using U-series decay, and when coupled with radiocarbon analyses will allow to calculate the C14/C12 ratio of the past water column. Creator(s): Robinson, Laura Date Created: 2011-01-01 Repository: USAP-DC (current) - LDEO-LEGACY (original) License: Creative Commons Attribution-NonCommercial v4.0 Generic [CC BY-NC 4.0] Spatial Extent(s) West: -70.5, East: -35, South: -61.5, North: -54.5 Temporal Extent(s) Start: 2009-06-01 - End: 2011-05-31 Award(s) NSF 0902957 Version: 1 Related Project(s) LGM and Deglacial Radiocarbon from U-series Dated Drake Passage Deep-sea Corals Keywords Biota Biota Corals Drake Passage Geochronology NBP0805 Oceans Paleoclimate Radiocarbon Southern Ocean