as the sea level rises the salinity actually will decrease. think...

also the temp rising will eventually cause a rubberband effect actually snapping back to a another iceage "at a future point" much as in the past cycles. a geological event that is repeated just as the climate is to change.

We may contribute to speeding it up but I seriously doubt we are going to change it or hinder it at this point perhaps a couple decades agao our influence to speed it up would have been possible.. now I think that choice and it's impact is inconsequential.