TERIFIC 2nd Ocean Glider Deployments in the Labrador Sea

As part of the TERIFIC (Targeted Experiment to Reconcile Increased Freshwater with Increased Convection) project funded by the European Research Council, two G2 Slocum gliders (398 and 409) from Teledyne Webb Research were deployed offshore of Qaqortoq, southwest of Greenland, in December 2021 from the 30-m research vessel Adolf Jensen. Both gliders were retrieved in late May 2022 onboard the RV Celtic Explorer southwest of the Labrador Sea. Pumped Slocum Glider Payload CTDs (Conductivity, Temperature, and Depth) provided by Sea-Bird Electronics (Bellevue, WA) were mounted on both Slocum with a sampling frequency of 0.5 Hz. An Aanderaa oxygen optode was also fixed on both gliders, with the optode on glider 409 fitted in an outside bracket. Both gliders were equipped with WETLabs (Western Environmental Technologies Laboratories) ECO Puck that measures chlorophyll and optical backscatter (532 and 700 nm) for 398 (BB2FLSLC) and chlorophyll, colored dissolved organic matter and optical backscatter (700 nm) for 409 (FLBBCDSLC). Initial processing was done with the toolbox PyGlider and both gliders were processed with the GliderTools toolbox (Gregor et al., 2019) to determine qc temperature and salinity variables. The vertical water velocity is estimated with the GliderFlight toolbox using a steady-state flight model.