January 2017: Christmas in Newfoundland
From Brad deYoung, Robin Matthews and Mark Downey
Physics and Physical Oceanography
Memorial University, Newfoundland
11 January 2017
This fall we deployed an ocean glider into the Labrador Sea. Our goal was to make measurements of the oxygen and carbon dioxide gas properties in the Labrador Sea. There are presently two deep-sea moorings in the Labrador Sea, separated by about 40 km off the shelf in 3500m of water. The K1 mooring was deployed by German researchers from GEOMAR in Kiel; the Seacycler mooring was deployed by Dalhousie researchers as part of the VITALS research program. We wanted to map the gas and water properties between and around the moorings. The glider operated from the surface down to 1000 m depth, flying along a 100 km extended line that connects the two moorings...
Vitals PhD student Laura Castro de la Guardia (University of Alberta) won top prize at the Compute Canada CANHEIT | HPCS Conference in Edmonton on June 22. Award Article Vitals Postdoc Xianmin Hu was the lead author on the poster winning second prize as well!
Two EM/APEX floats were successfully launched into the Labrador Sea at the mooring site. You can follow their progress at our very minimal site.
The following maps (courtesy to Mitchell Wolf) show the current and recent past locations of our VITALS assets in the Labradoe Sea. The colour of the line indicates the time of each known location. Five Argo floats were deployed on the last AR7W cruise, four of which had oxygen sensors. One float failed almost immediately, last profile about 10 days after deployment (4901781). Two of the Argo floats have left the Lab Sea, one of which was the one with no oxygen sensor (4901783). The remaining two Argo floats are still in the convective region approximately.
Three gliders are actually down the Labrador Shelf. You can follow them in Google Earth on our map page.
Learn more about how our scientists collect deep water samples and determine oxygen concentrations to calibrate oxygen sensors on the gliders.
OSNAP stands for Overturning in the Subpolar North Atlantic Program and is a sister program of VITALS. This international program will provide a continuous record of the full-water column, trans-basin fluxes of heat, mass and freshwater in the subpolar North Atlantic.