The study's lead author, Maya Bhatia, second from left, spent seven weeks on the southwestern margin of the Greenland ice sheet in the spring/summer 2008 with her colleagues: WHOI marine chemist Liz Kujawinski, far left, field assistant Ben Gready, second from right, from the University of Alberta, and WHOI marine chemist Matt Charette, far right. Other colleagues included glaciologist Sarah B. Das, and chemistry research associates Crystaline F. Breier and Paul Henderson, all from WHOI.