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Abstract:
Freshwater transport (relative to a reference salinity of 34.9) and gridded data fields of southward velocity and salinity from the East Greenland Current in Fram Strait. The time series are collected by moorings F11, F12, F13, F14, F17 from the Fram Strait Arctic Outflow Observatory (Norwegian Polar Institute) and by moorings F9 and F10 (Alfred Wegener Institute). The moorings were at 79N from Sept. 1997 to Aug. 2002 and at 78°50’N from Sept. 2002 to Aug. 2015. Only in Sept. 2003 the extra mooring (F17) was added on the shelf.
Note: data files are created for both latitudes (79N and 78°50’N) and time periods individually and need to be looked at separately since the southward move of the array had significant implications for the observed flow field. The moorings were located between 0°W and 6.5°W until Aug. 2002. In Sept. 2003 an extra mooring was added at 8°W and allowed for a larger portion of the outflow to be measured.
Quality
Velocity data are corrected for magnetic deviation and tides are removed with a 41-hr low-pass filter. The salinity is based on mooring data and a seasonally varying hydrographic data set to improve the stratification. Data are monthly averaged. Data gaps are treated with regression with neighboring instruments of filled in with long-term mean values. Note: Version V2.0 is a corrected version from V1.0. An error was found in the regression of velocity on the shelf in 2011-2012 which amounted to a too large near-surface velocity. The gridded V and freshwater transport time series are corrected accordingly.