How unstable were the Antarctic Ice Sheets during warmer times in the past? When did the ice-sheet form in Greenland? How often has the Greenland ice sheet collapses since? Key questions like this are the core of the cosmogenic noble gas projects of WINGS (in collaboration with the Lamont Cosmo Group). The stable cosmogenic noble gas nuclides 3He and 21Ne, in conjunction with other cosmogenic isotopes such as 10Be, are key to solving these puzzles on longer timescales (100's of thousand of years to millions of years) and to contribute to a quantitative understanding of the response of the earth's cryosphere to warm climates. This work is supported by a Fellowship by the Center for Climate and Life.
