USAP-DC

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Impact of Convective Processes and Sea Ice Formation on the Distribution of Iron in the Ross Sea: Closing the Seasonal Cycle Start Date: 2015-09-01 End Date: 2020-02-29 Project Website(s) PIPERS Description/Abstract The waters of the Ross Sea continental shelf are among the most productive in the Southern Ocean, and may comprise a significant regional oceanic sink for atmospheric carbon dioxide. In this region, primary production can be limited by the supply of dissolved iron to surface waters during the growing season. Water-column observations, sampling and measurements are to be carried out in the late autumn-early winter time frame on the Ross Sea continental shelf and coastal polynyas (Terra Nova Bay and Ross Ice Shelf polynyas), in order to better understand what drives the biogeochemical redistribution of micronutrient iron species during the onset of convective mixing and sea-ice formation at this time of year, thereby setting conditions for primary production during the following spring. The spectacular field setting and remote, hostile conditions that accompany the proposed field study present exciting possibilities for STEM education and training. At the K-12 level, the project seeks to support the development of educational outreach materials targeting elementary and middle school students, pre-service science teachers, and in-service science teachers. Personnel Person Role Sedwick, Peter Investigator and contact Sohst, Bettina Technical Contact Funding Antarctic Ocean and Atmospheric Sciences Award # 1543483 AMD - DIF Record(s) USAP-1543483_1 Deployment Deployment Type NBP1704 ship expedition Data Management Plan DMP_20150406_PeterSedwick.pdf Product Level: 1 (processed data) Datasets Repository Title (link) Format(s) Status R2R NBP1704 Expedition Data Not Provided exist BCO-DMO Impact of Convective Processes and Sea Ice Formation on the Distribution of Iron in the Ross Sea: Closing the Seasonal Cycle Not Provided exists Publications Ackley, S.F., Stammerjohn, S., Maksym, T., Smith, M., Cassano, J., Guest, P., Tison, J.L., Delille, B., Loose, B., Sedwick, P., DePace, L., Parno, J. (2020), Sea-ice production and air/ice/ocean/biogeochemistry interactions in the Ross Sea during the PIPERS 2017 autumn field campaign. Annals of Glaciology, pp.1-15 (doi:10.1017/aog.2020.31) Sedwick, P. N., Sohst, B. M., O’Hara, C., Stammerjohn, S. E., Loose, B., Dinniman, M. S., Buck, N. J., Resing, J. A., & Ackley, S. F. (2022). Seasonal Dynamics of Dissolved Iron on the Antarctic Continental Shelf: Late‐Fall Observations From the Terra Nova Bay and Ross Ice Shelf Polynyas. Journal of Geophysical Research: Oceans, 127(10). Portico. (doi:10.1029/2022jc018999) Loose, B., Stammerjohn, S., Sedwick, P., & Ackley, S. (2023). Sea Ice Formation, Glacial Melt and the Solubility Pump Boundary Conditions in the Ross Sea. Journal of Geophysical Research: Oceans, 128(8). Portico. (doi:10.1029/2022jc019322) Keywords BIOGEOCHEMICAL CYCLES Iron MARINE ECOSYSTEMS NBP1704 POLYNYAS Ross Sea SALINITY/DENSITY TRACE ELEMENTS Platforms and Instruments R/V NBP