> This means that once an ice sheet starts to melt there is no way to stop it
> melting completely. So the tipping point is not when the ice sheet
> disappears, but when it starts melting. That is the point of no return.
I must admit that I do not find that explanation convincing,
particularly the bit about water vapour from melting ice. But you may
have phrased things poorly. Could you give a link to a more detailed
explanation of what you are trying to say?
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