This data set contains hydrographic and velocity measurements of high spatial resolution which were collected during 13 shipboard surveys between 2004 and 2018. The surveys included seven transects across the northern slope of Iceland.
The hydrographic data on all of the cruises were obtained using a Sea-Bird 911+ conductivity-temperature-depth (CTD) instrument. The CTD was mounted on a rosette with Niskin bottles to collect water samples, which were used to calibrate the conductivity sensor. The resulting accuracy of the CTD measurements is 0.3 db for pressure, 0.001 °C for temperature, and 0.002 for salinity.
Velocities were measured using acoustic Doppler current profiler (ADCP) instruments. On three of the cruises (RRS James Clark Ross 2004 JR105, R/V Knorr 2008 KN194, NRV Alliance 2018 ALL0118), a vessel-mounted ADCP (VMADCP) was used, while an upward- and downward-facing lowered ADCP (LADCP) system mounted on the rosette was utilized on the remaining surveys.
The VMADCP data on the R/V Knorr 2008 (KN194) and NRV Alliance 2018 (ALL0118) cruises were acquired using the University of Hawaii Data Acquisition System (UHDAS) and the VMDAS collection software (Teledyne RDInstruments), respectively.
Subsequently, these data were processed using the Common Ocean Data Access System (CODAS; Firing and Hummon 2010). On the RRS James Clark Ross 2004 cruise (JR105), VMADCP data were collected and processed using a custom data acquisition system unique to the ship (Pstar system).
The LADCP data were processed using the LADCP Processing Software Package from the Lamont-Doherty Earth Observatory (Thurnherr 2010, 2018).
Following the processing, the barotropic tides were removed from all of the velocity data sets by applying an updated version of the regional tidal model of Egbert and Erofeeva (2002), which has a resolution of 1/60°.
This data set also includes data from a current meter mooring deployed from 23 August 2005 to 10 August 2006, situated 19 km north of the shelf break at the Hornbanki transect. The instrument was an Aanderaa RCM-7, sampling hourly, which was placed at 365 m depth on the 620 m isobath.
