Originally Posted by: Dr_simonOne really worrying thing is that much CO2 is locked up in glaciers ice caps etc. Once those babies start to thaw there may well be a positive feed back effect.[/QUOTE]
Yep. And one of the stances against man causing global warming is that some claim the rise in temperatures precedes the rise in CO2, being that oceans are by far the largest source of it, and warmer oceans release more. I don't know how much truth there is to it myself, but yeah.

[QUOTE=LINK FROM ABOVE]Figure 12: Eleven-year moving average of global surface temperature, as estimated by NASA GISS (23, 33, and 34), plotted as deviation from 1890 (left axis and light line), as compared with atmospheric CO2 (right axis and dark line) (2). Approximately 82% of the increase in CO2 occurred after the temperature maximum in 1940, as is shown in figure 1.