2013-2014 Science Planning Summaries
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Physiological and ecosystem structure forcings on carbon fluxes in the Southern Ocean mixed layer

Program Manager:
Dr. Peter Milne

Event Number: O-405-L

ASC POC/Implementer:
Samina Ouda / Adam Jenkins

Dr. Nicolas Cassar (Principal Investigator)
Project LinkExternal Non U.S. Government Site

Duke University
Nicholas School of Environment
Durham, North Carolina

Supporting Stations:  ARSV Laurence M. Gould
Research Locations:  LTER study site

Project Description:
This project will advance our understanding of Southern Ocean biogeochemistry by investigating some of the physiological and ecosystem mechanisms governing the interannual variability in mixed layer carbon fluxes in the Southern Ocean. More specifically, researchers will address the following postulates: (1) the well documented influence of iron on primary production reverberates onto carbon export production in the Southern Ocean; (2) carbon export production and efficiency are not dependent on the presence of diatoms in the Southern Ocean; (3) grazers enhance carbon export production and efficiency in some regions of the Southern Ocean.

Field Season Overview:
During the annual LTER cruises, LMG14-01, one project participant will install the system and sail the cruise to monitor the equipment. The system comprises an equilibrator inlet mass spectrometer, underway transmissometer, flow cytometer, and FRRF (Fast Repetition Rate Fluorometer). At the end of the cruise the project participant will remove the sampling package from the vessel.

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