There is debate over the causes of the large and abrupt climate changes that the North Atlantic region has experienced in the past (and may do in the future). The driving forces of such changes might originate in the North Atlantic itself, or could be transmitted to the region from elsewhere. New evidence on the extent and movement of the British Ice Sheet around the end of the last ice age supports the first contention, and in particular implicates the advance and retreat of the Laurentide Ice Sheet in causing some of the big climate jumps of the past.
