Possible role for dust or other northern forcing of ice-age carbon dioxide changes

A simple impulse-decay model driven by the history of atmospheric dust loading from Greenland can match the history of glacial–interglacial changes in atmospheric carbon dioxide concentration rather accurately, if model parameters are tuned within physically possible ranges; forcing with the Greenland temperature record produces a similarly good match. Calculations using southern forcing do not match as accurately. These results leave open the possibility of northern control of glacial–interglacial carbon dioxide changes.