Figure— Potentially sensitive switch point areas in which local effects might trigger larger-scale changes. The chart shows regions in which specific local phenomena may result in points of sensitivity for larger-scale and possibly rapid changes in regional or global climatic conditions. (Source: Grubb 2004, from J. Schellnhuber and H. Held, adapted from How Fragile is the Earth System?', in J. Briden, and T. Downing, T.(Eds.), Managing the Earth: the Eleventh Linacre Lectures, Univ. Press, Oxford, 2002).