Are you aware that if the ocean temperature rises a couple of degrees in the North Atlantic, it can cause the Gulf Stream to change and/or lessen its flow? If so, that will deprive the Eastern coasts of North America and most of northwestern Europe to get a whole lot colder in the winter, like a mini-ice age

Actually, Little Hawk, like a full scale ice age. Changes in the Gulf Stream are the marker for changes between glacial and interglacial periods. Trying to untangle cause and effect round it is as hard as seperataing morris dancers from a brewery....