BBC: Scientists have found a 200-year lag time between past climate events at the poles.
The most detailed Antarctic ice core provides the first clear comparison with Greenland records, revealing a link between northern and southern hemisphere climate change.
Scientists found that abrupt and large temperature changes first occurred in Greenland, with the effect delayed about 200 years in the Antarctic.
The study appears in Nature journal.
The paper is the work of almost 80 authors and it is...