Highest Degree
Ph.D. U. of Bern, Switzerland
Activities
1. Reconstruction of paleoatmospheres from ice core records in Greenland and Antarctica back to > 500,000 years covering at least 5 glacial/interglacial cycles; main emphasis is to reconstruct atmospheric CO2 and d13CO2, 2. Global biogeochemical cycles of radiatively important atmospheric trace gases; biosphere-atmosphere interactions, 3. Stable isotopes in atmospheric CO2 (d13C and d18O) to arrive at improved global carbon cycle budgets (in collaboration with C. D. Keeling). Process-oriented studies to determine the significance of 18O in atmospheric CO2, 4. Stable isotopes of Cl and Br in aerosols to determine if Cl and Br radicals are produced in the troposphere, 5. Investigations on CO2, CH4, 85Kr and N2O in the stratosphere (and their isotopic species 13C and 18O in CO2, 13C, D and 14C and CH4, 15N and 18O in N2O) to determine the troposphere/stratosphere air exchange rate. Recent experimental results on 15N and 18O in stratospheric N2O are not compatible with current assumptions on stratospheric N2O destruction.
Sea regions of study
North Atlantic Ocean
North Pacific Ocean
