River_discharge_Naujat_Kuat_River_Greenland_2011_to_2014

This project studies Greenlandic Rivers as integrated signals of a rapidly changing Arctic hydrological cycle. Observed increased rates of melt on the Greenland Ice Sheet (GrIS) are expected to have a profound impact on the runoff of numerous rivers draining the ice sheet margin. However, there are few observational records of water discharge of Greenlandic Rivers, or any other observations to constrain runoff to systematically assess the freshwater drained to the ocean. This dataset consists of stage and discharge measurments of a remote gauging station which was installed at a bedrock constriction along the Naujat Kuat River (64°12'45"N, 50°12'22"W) in 2011, about 11 km from the Greenland Ice Sheet margin. The river drains into Ameragdla fjord, which is a tributary to Lyssefjord directly South of Nuuk, Greenland’s capital. The station is equipped with a Campbell SR50a sonic ranger and samples river stage height every 60 minutes. The sonic ranger measurements are corrected automatically for fluctuations in local air temperature to correct for variations in speed of sound in air, as specified by the manufacturer. We report the temperature corrected stage height (TCDT) in m. The reported operational accuracy for a Campbell SR50 sonic ranger is ±2.54 cm, but the turbulence of the water below the sensor may be as high as ±25 cm. We obtained a cross-sectional profile and velocity measurements, a well as numerical modeling to establish a stage-discharge relationship.