USAP-DC

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Organic carbon oxidation and iron remobilization by West Antarctic shelf sediments Short Title: Organic carbon oxidation and iron remobilization Start Date: 2015-09-01 End Date: 2020-02-29 Description/Abstract This project investigated the distribution of dissolved and solid phase iron in sediments along the western edge of the Antarctic Peninsula (i.e., the West Antarctic Shelf), as well as the biogeochemical processes occurring in these sediments that exert a major control on sediment iron distributions. In many coastal and continental margin regions, including those along the west side of the Antarctic Peninsula, sediments appear to represent a potentially important, but poorly quantified, source of iron to the overlying water column to support primary productivity. Sediment concentrations of iron are high (relative to those in seawater), and a number of different processes in the sediments may allow iron to “leak” from the sediments to the overlying waters, which could then support productivity driven by this “recycled” iron. Personnel Person Role Burdige, David Investigator and contact Christensen, John Co-Investigator Funding Antarctic Earth Sciences Award # 1551195 AMD - DIF Record(s) USAP-1551195_1 Deployment Deployment Type NBP1601 ship expedition Data Management Plan DMP_Burdige_Christensen_OPP-1551195.pdf Product Level: 1 (processed data) Datasets Repository Title (link) Format(s) Status R2R Expedition data of NBP1601 Not Provided exists BCO-DMO Project: Organic Carbon Oxidation and Iron Remobilization by West Antarctic Shelf Sediments Not Provided exists Publications Christensen, J. P. (2020). Improved bromide measurements using chloramine-T shows, bromide depletion in the Gulf of Maine. Continental Shelf Research, 193, 104028. (doi:10.1016/j.csr.2019.104028) Preziosi, B. M., Runge, J. A., Christensen, J. P., & Jones, R. J. (2017). Effects of pH and temperature on egg hatching success of the marine planktonic copepod, Calanus finmarchicus. Marine Biology, 164(11). (doi:10.1007/s00227-017-3243-5) Keywords BIOGEOCHEMICAL CYCLES Iron Remobilization NBP1601 SEDIMENT CHEMISTRY West Antarctic Shelf Platforms and Instruments R/V NBP