‡  H. Kieffer, et al., 2000, “New eyes in the sky measure glaciers and ice sheets,” EOS, Transactions, American Geophysical Union 81: 265, 270–71. See also R. J. Braithwaite and Y. Zhang, “Relationships between inter-annual variability of glacier mass balance and climate,” Journal of Glaciology 45 (2000): 456–62.