Surface mass balance and energy balance of the 79N Glacier (Nioghalvfjerdsfjorden, NE Greenland) modeled by linking COSIPY and Polar WRF

Abstract To get a better overview of atmosphere-driven mass changes at the 79N Glacier (Nioghalvfjerdsfjorden Glacier), largest outlet glacier northeast Greenland ice stream, surface balance (SMB) is modeled by linking COupled Snowpack and Ice energy mass-balance model in PYthon (COSIPY) with output regional atmospheric (Polar WRF) for years 2014–2018. After manual optimization, produces reliable results when compared to observations region values from literature. High spatial resolution (1 km) simulations reveal strong interannual variability SMB. Stronger melting increased ablation runoff high loss (2016 2017) whereas other (2015 2018) refreezing inside snowpack dominated (MB). A cooler climate higher snowfall-driven accumulation, albedo reduced melt period 2018 resulted positive SMB 2018, however, annual total MB remained negative. The suggest promising new dataset gaining more insights into processes their contribution acceleration retreat Greenland.