[1] Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA
[2] US Geol Survey, Natl Ice Core Lab, Denver, CO 80225 USA
[3] US Antarct Program, Antarct Support Contract, Denver, CO USA
[4] Univ Wisconsin, Ice Drilling Design & Operat, Madison, WI USA
[5] ADC Management Serv Inc, Lakewood, CO USA
[6] Victoria Univ Wellington, Antarct Res Ctr, Wellington, New Zealand
[7] CEA CNRS UVSQ IPSL, Lab Sci Climat & Environm, Gif Sur Yvette, France
[8] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark
[9] Univ Colorado, Inst Arct & Alpine Res, Boulder, CO 80309 USA
[10] Penn State Univ, Dept Geosci, University Pk, PA 16802 USA
[11] Dartmouth Coll, Dept Earth Sci, Hanover, NH 03755 USA
[12] Nevada Syst Higher Educ, Desert Res Inst, Reno, NV USA