2016-2017 Science Planning Summaries
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2016-2017 USAP Field Season
Project Detail

Project Title

Investigating biogeochemical fluxes and linkages to climate change with multi-scale observations in the Drake Passage

White aspirated bow inlet for the ARSV Laurence M. Gould atmospheric O2 system.
Photo by: Jonathan Bent


Event Number:

Program Manager:
Dr. Peter Milne

ASC POC/Implementer:
Chelsea Wegner / Bruce Felix

Principal Investigator

Dr. Britton B Stephens

University Corporation for Atmospheric Research, UCAR/NCAR
Boulder, Colorado

Project Web Site:


Supporting Stations: ARSV Laurence M. Gould
Research Locations: Drake Passage


Since June 2012, this project has collected underway atmospheric oxygen and carbon dioxide concentration measurements from the ARSV Laurence M. Gould (LMG) in collaboration with the longer-running efforts collecting partial pressure carbon dioxide (pCO2), eXpendable BathyThermograph (XBT), and acoustic Doppler current profiler (ADCP) measurements. The objectives of these atmospheric oxygen and carbon dioxide measurements are to improve understanding of the large-scale thermal and biological forcing of Southern Ocean seasonal air-sea carbon dioxide fluxes; to help in assessing the scaling of the Drake Passage underway pCO2 and discrete measurements to basin scales; and to explore short-term oxygen variations as a diagnostic of local-scale productivity.

Field Season Overview

This project will conduct ongoing measurements of atmospheric O2 and CO2 in the Drake Passage from the LMG. Measurements are conducted on every cruise as “underway science” by semi-automated underway systems that require minimal intervention from staff technicians. Data is sent to the PI daily by email, and at the end of each cruise by mailing a USB pen drive. A team member will attend two port calls in August and February to perform system maintenance.