TY - JOUR T1 - Organic carbon and planktic foraminifera radiocarbon derived Holocene sediment accumulation rates in the northern slopes of the Gulf of Mexico JF - Deep Sea Research Part I: Oceanographic Research Papers Y1 - 2023 A1 - Schwing, Patrick A1 - Chanton, Jeffrey A1 - Bosman, Samantha A1 - Brooks, Gregg A1 - Larson, Rebekka A. A1 - Romero, Isabel A1 - Diercks, Arne KW - accumulation rates KW - Foraminifera KW - Gulf of Mexico KW - radiocarbon KW - Radiogeochemistry AB - In the context of climate regulation and anthropogenic waste detoxification (e.g. oil spills), estimates of deep ocean sedimentation and carbon sequestration are of the utmost importance. Radiocarbon (14C) is a common radioisotope that can be used to establish millennial scale sediment accumulation rates. The objectives of this study were to: 1) establish ages for co-occurring total organic carbon (TOC) and planktic foraminifera (carbonate) in the northeastern Gulf of Mexico (GoM), 2) use these ages to estimate accumulation rates independently, 3) identify any evidence of redistribution, and 4) examine any offset between TOC and carbonate 14C ages as a tool to potentially identify selective TOC transport. Sediment samples were collected in May 2018 from the RV Point Sur using an Ocean Instruments MC-800 multi corer. Radiocarbon measurements of both planktic foraminifera and TOC subsamples were made at the National Ocean Science Accelerator Mass Spectrometry Facility (NOSAMS). Radiocarbon ages, calibrated using the OxCal 4.4, ranged from recent to 6407 BP. Linear (LAR: 4–24 cm/kyr) and mass accumulation rates (MAR: 1.5–11.5 g/cm2/kyr) were generally consistent with those reported by other recent studies in the GoM. At two sites, C14 ages decreased from the surface to the second sampling increment which was consistent with sediment redistribution. The TOC-carbonate offsets, which are indicative of lateral advection and organic matter aging, were lower than those found in the majority of other regions, which was consistent with less lateral transport or a more oligotrophic setting. The magnitude in radiocarbon age offsets with depth could potentially be used as a relative aging or transport assessment tool in areas with little resuspension. VL - 193 UR - https://www.sciencedirect.com/science/article/pii/S0967063722002722 ER - TY - JOUR T1 - Sea level rise in Tampa Bay JF - Eos, Transactions, American Geophysical Union Y1 - 2007 A1 - Cronin, Thomas M. A1 - Edgar, N. Terence A1 - Brooks, Gregg A1 - Hastings, David A1 - Larson, Rebekka A1 - Hine, Albert A1 - Locker, Stanley A1 - Suthard, Beau A1 - Flower, Benjamin A1 - Hollander, David A1 - Wehmiller, John A1 - Willard, Debra A. A1 - Smith, Shannon VL - 88 IS - 10 N1 - id: 1899; References: 14; illus. incl. geol. sketch map Latitude:N272700,N280200 Longitude:W0822200,W0825100Y JO - Sea level rise in Tampa Bay ER -