These people are really grasping at straws to continue receiving grant money.
This is actually very plausible - the tsunami churning the cold waters from the depths of the oceans, to cool the surface waters.
Actually this makes for good common sense, for once. So if the cold lower waters are coming to the surface, which will affect the gulf stream, global cooling will result, causing more ice in the ice caps, which will further affect the gulf stream and keep the cooling cycle going. Get ready for the predicted mini ice age which is better than droughts and warming. God has it all under control.