The author is part of a scientific team investigating repeated surges in iceberg activity in the Earth's past known as the Heinrich events. Speculates on how our current knowledge applies to ice sheet breakup in a warmed climate. D. McInnes, Earth , 20-23, Nov. 1993. The recent finding that Arctic tundra is releasing CO 2 leads researchers to suspect that the carbon balance is shifting as a result of global warming, and could reinforce warming in the future. The study of paleoanalogs, popular with Russian climatologists, is based on the assumption that we can learn about future climate by examining periods in the Earth's climatological history when CO 2 was high.
Most western scientists prefer to use computer models instead.
News , 35-37, July 26, 1993. A profile of stratospheric ozone researcher Susan Solomon. The supercomputer, fine-mesh ocean circulation model developed by Albert Semtner and Robert Chervin is impressing other oceanographers. American , 44-50, June 1993. Boreholes drilled into continental rock can recover fossil temperatures that reveal the climate of the past, but the results require careful interpretation.