Drivers of the Mixed Layer Salinity Seasonal Variability in the Arctic Ocean

• DOI: 10.22541/essoar.169091878.83796479/v1
• Publication Date: 2023-08-01T19:39:47Z
• Authors: Alexandre Supply; Camille Lique; Nicolas Kolodziej...; Claude Talandier
• Keywords: Mixed layer; Entrainment (biomusicology); Seasonality

The processes driving the seasonal variability of mixed layer salinity in Arctic Ocean are investigated using a simulation performed with regional ocean – sea ice model at high resolution. While variations depth remain small, particular under perennial (O(30m)), mean varies largely, cycle as 3 pss. On shelves, where is seasonal, much fresher but exhibits similar amplitude. Overall, results largely from 1D vertical balance between freshwater flux surface arising melt and freezing processes, mixing entrainment occurring base layer. largest found summer, when thinnest. Over this simple complexified due to role advection river runoff that can locally affect salinity. Interestingly, less than 100km on each side edge, all affecting amplified. This suggests need better observed understand ocean-sea ice-atmosphere exchanges these regions.