[1] Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA
[2] Univ Michigan, Dept Earth & Environm Sci, Ann Arbor, MI 48109 USA
[3] Univ Calif Davis, Dept Earth & Planetary Sci, Davis, CA 95616 USA
[4] Syracuse Univ, Dept Earth & Environm Sci, Syracuse, NY USA
[5] Univ Connecticut, Dept Geosci, Storrs, CT USA
[6] Queen Mary Univ London, Sch Geog, London, England
[7] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA
[8] Columbia Univ, Dept Earth & Environm Sci, Palisades, NY USA
[9] Univ Southampton, Sch Ocean & Earth Sci, Natl Oceanog Ctr Southampton, Southampton, Hants, England
[10] Univ Stockholm, Dept Meteorol, Stockholm, Sweden
[11] George Mason Univ, Dept Atmospher Ocean & Earth Sci, Fairfax, VA 22030 USA
[12] CNRS, Geosci Environm Toulouse, Toulouse, France
[13] Smithsonian Natl Museum Nat Hist, Dept Paleobiol, Washington, DC USA
[14] Univ Calif Riverside, Dept Earth Sci, Riverside, CA 92521 USA
[15] Univ Bristol, Sch Geog Sci, Bristol, Avon, England
[16] Trinity Coll Dublin, Dept Bot, Dublin, Ireland
[17] Univ Leeds, Sch Earth & Environm, Leeds, W Yorkshire, England
[18] Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA
[19] Texas A&M Univ, Dept Oceanog, College Stn, TX 77843 USA