Cosmogenic radionuclide in polar ice
The focus of this proposal lies on the continuation of the successful analyses of 10Be and 36Cl in the Dronning Maud Land ice core (EDML) from Antarctica. Combined with data obtained earlier from the central Greenland ice core (GRIP) and 14C data from tree rings we will have the world's largest database of cosmogenic radionuclides to address the following issues:
- Refinement of the reconstruction of solar variability over the past 100'000 years
- Establishing a quantitative solar forcing function for the past 10'000 year
- Separation of cosmogenic radionuclide production and system effects
- Modelling of the atmospheric transport of aerosols and cosmogenic radionuclides
- Identification of changes in the carbon cycle and in particular changes in the thermohaline circulation
- Refinement of the reconstruction of the paleo-geomagnetic field intensity
- Absolute dating of ice cores using the 14C calibration curve
- Development of new sample preparation methods for small AMS machines