Policy Documents

The Phase Relations Among Atmospheric CO2 Content, Temperature and Global Ice Volume Over the Past 420 ka

Manfred Mudelsee –
February 1, 2001

Writing in Quaternary Science Reviews in 2001, Manfred Mudelsee addresses the problem of determining the accuracy of estimates of the phase relations between Vostok's CO2 and proxy air-temperature and ice-volume records for the past 420 ka. Over the full 420 ka of the Vostok record, he found CO2 variations lagged behind atmospheric temperature changes in the Southern Hemisphere by 1.3 ± 1.0 ka, and preceded global ice-volume variations by 2.7 ± 1.3 ka. However, significant short-term changes in the lag of CO2 relative to temperature, subsequent to Terminations II and III, were also detected.