How do you prevent running nose when working in cold water?

Your nose runs in the cold because water is a byproduct of the cold air being warmed, the excess run=s down your throat and out your nose, about the only way to stop it ( as long as it isnt caused by Allergies or a cold ) is to warm the air before it reached your nose by wearing a scarf or something to cover it. For water, nose plugs might help.