[1] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA
[2] Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA
[3] Univ Bern, Oeschger Ctr Climate Change Res, CH-3012 Bern, Switzerland
[4] Univ E Anglia, Sch Environm Sci, Climat Res Unit, Norwich NR4 7TJ, Norfolk, England
[5] Swiss Fed Res Inst WSL, CH-8903 Birmensdorf, Switzerland
[6] Adam Mickiewicz Univ, Inst Geoecol & Geoinformat, PL-61680 Poznan, Poland
[7] Johannes Gutenberg Univ Mainz, Dept Geog, D-55099 Mainz, Germany
[8] Univ Maryland, Dept Geol, College Pk, MD 20742 USA
[9] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA
[10] Stockholm Univ, Dept Phys Geog & Quaternary Geol, Bert Bolin Ctr Climate Res, SE-10691 Stockholm, Sweden
[11] Univ Arizona, Tree Ring Res Lab, Tucson, AZ USA
[12] VN Sukachev Inst Forest SB RAS, Krasnoyarsk 660036, Russia
[13] Univ Basel, Inst Bot, CH-4056 Basel, Switzerland
[14] Univ Western Ontario, Dept Geog, London, ON N6A 5C2, Canada
[15] Max Planck Inst Meteorol, D-20146 Hamburg, Germany
[16] Inst Forest, Krasnoyarsk 660041, Russia
[17] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[18] Univ St Andrews, Sch Geog & Geosci, St Andrews KY16 9AL, Fife, Scotland