Sigfus Johnsen

Contrasting atmospheric and climate dynamics of the last-glacial and Holocene periods

Henrik Svensmark, P. Ditlevsen, S. Johnsen, 1996, Nature.

Ancient Biomolecules from Deep Ice Cores Reveal a Forested Southern Greenland

James Haile, Wouter Boomsma, Michael Bunce, 2007, Science.