Thanks for the 1990 ipcc link. The graph (page 7) of northern and southern hemisphere sea ice extent anomalies is interesting - they appear to have moved in rou

Thanks for the 1990 ipcc link. The graph (page 7) of northern and southern hemisphere sea ice extent anomalies is interesting - they appear to have moved in rough opposition in most of the period from the early 1970s to 1990, as they are today.