By my rudimentary estimation (based on numbers from https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/grl.50193 https://agupubs.onlinelibrary.wiley.com/d

By my rudimentary estimation (based on numbers from https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/grl.50193 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/grl... Figure 3) I believe the annual ice melt in the Arctic each year is approximately 10,000 km^3 of ice. Let's assume all of it flows into the Atlantic. Remove 10% of that volume to approximate the liquid volume of the ice, then convert to kilograms of water = 9x10^15 kg. Average ocean salinity is 35g of salt to 1kg of water. That comes out to ~3.15*10^14 (315 trillion) kg of salt. You can pick a percentage that flows into the Atlantic, but it would still require on the order of trillions of kilograms of salt.