Arif,
I do keep thinking "climate change", but sometimes that starts political arguments. I've been yelled at for saying so (in other websites, not ATP) and told by Admins not to start political arguments (not yet in ATP).
I DO think the unusual weather we've seen in the last 5 or so years is "more unusual than usual". And I think it's hard to argue with melting glaciers. I saw one in Alaska. "It used to come to here" ... now it'/s WAY off in the distance.