Greenland ice core reconstruction of millennial changes in North American wildfire and soil activity over the last glacial cycle

Hubertus Fischer1, Simon Schuepbach1, Gideon Gfeller1, Matthias Bigler1, Regine Roethlisberger1, Tobias Erhardt2, Thomas F Stocker1, Robert Mulvaney3 and Eric W Wolff4, (1)University of Bern, Bern, Switzerland, (2)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (3)British Antarctic Survey, Cambridge, United Kingdom, (4)University of Cambridge, Cambridge, United Kingdom