2018-2019 Science Planning Summaries
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2018-2019 USAP Field Season
Project Detail

Project Title

Biological and physical drivers of O2 saturation and net community production variability at the Western Antarctic Peninsula


Biological and physical drivers of O2 saturation and net community production variability at the Western Antarctic Peninsula
B-461-L Research Location(s): PAL-LTER Grid

Summary

Event Number:
B-461-L

Program Manager:
Dr. Jennifer Burns / Dr. Christian Fritsen

ASC POC/Implementer:
David Rivera / Bruce Felix


Principal Investigator(s)

Dr. Nicolas Cassar
nicolas.cassar@duke.edu
Duke University
Nicholas School of Environment
Durham, North Carolina


Location

Supporting Stations: ARSV Laurence M. Gould
Research Locations: PAL-LTER Grid


Description

The project focuses on a high-resolution investigative survey of oxygen/Argon and total oxygen supersaturation along the Palmer Long-Term Ecological Research (LTER) grid to assess physical and biological drivers of the net community production (NCP) and oxygen-saturation variability. The primary goal is to elucidate and parameterize the key biological factors regulating carbon fluxes and NCP. To accomplish this, researchers will combine high-frequency underway NCP estimates by equilibrator inlet mass spectrometry (EIMS) with community characterization by imaging flowcytobot (IFCB) and DNA sequencing. The observations, complemented by a comprehensive suite of measurements made by the Palmer Long-Term Ecological Research (LTER) group, will identify plankton characteristics and mechanisms key to biological carbon fluxes and the fate of primary production.


Field Season Overview

Researchers will sail on ARSV Laurence M. Gould cruise LMG19-01 from Punta Arenas, Chile. They will deploy the EIMS and the IFCB, which will be plumbed into the underway seawater line and set up in onboard laboratories. The team will also conduct discrete collections for DNA/RNA analysis from the underway seawater line. All instrument measurements and discrete collections will be made along the PAL-LTER cruise track. Comprehensive measurements conducted by the USAP and PAL-LTER will include IFCB, flow-through transmissometer, flowcytometry, Fluorescence Induction and Relaxation System (FIRe) fluorometer and delta-O-18.