Scientists are studying ice from different climate periods in the past to better understand how the ice sheet might respond in the future. (sciencedaily.com)
The ratio allows for depicting visually the influence of all those previous CO2 emissions on moving 30 - year climate periods. (c3headlines.com)
They concluded in the January Climate Research that «across the world, many records reveal that the 20th century is probably not the warmest nor a uniquely extreme climate period of the last millennium.» (scientificamerican.com)