[1] Princeton Univ, NOAA Geophys Fluid Dynam Lab, Forrestal Campus, Princeton, NJ 08544 USA
[2] Pacific Northwest Natl Lab, Atmospher Sci & Global Change Div, Richland, WA USA
[3] Western Univ, Social Sci Ctr, Dept Geog & Environm, London, ON, Canada
[4] Social Sci Ctr, Dept Biol, London, ON, Canada
[5] CALTECH, Geol & Planetary Sci, Pasadena, CA USA