Would an interruption of the Gulf Stream be reversible? And if so, at what cost?

I’m blessed with a very popular blog in French. One of the questions that came up lately in my dialogue with commentators is that of the reversibility of major ecological disasters induced by human activity and of the feasibility of reversing such disasters with the tools pertaining to our current technology.

This is a serious question, a very serious one, and I intend to use the popularity of my (French) blog to push the issue a far as needs be. I’ve chosen one example – so that we don’t get locked in trivial generalities – that of a possible interruption of the Gulf Stream due to human activity. The consensus is that such an interruption – which I understand already occurred for ten days in 2004 – would make the temperature in Western Europe drop permanently by 5 to 10 degrees Celsius, that is, 10 to 20 degrees Fahrenheit. Is the interruption a possibility – even remote – and should the event occur, what are our realistic chances of reversing it?

According to the response I get to my query, I would consider launching an appropriate form of action around it. I will not be waiting – passively – to get your response only: I will try to reach out to the people I understand are the true experts on this issue and will refer back to you what I’m hearing.

Also – in an attempt to make it a full-fledged effort – I will communicate in each of my two blogs any progress made on the other.

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