Simulations on Swiss CSCS supercomputer shows during the last ice age cold and snow came from the south
The image shows the behaviour of the jet stream and precipitation in the winter months today (PD) and during the last glacial maximum (LGM). (Source: Christoph Raible) (cscs)
1 Jun 2015 - As simulations conducted by climate researchers from the University of Bern and the Oeschger Centre reveal, the precipitation during the last ice age came from the Mediterranean. Therefore, the glaciers in the Alps presumably began to grow from the south. This is due to a shift in the jet stream towards the equator. They did run simulations on supercomputers of the Swiss centre CSCS. This was described in a blog published by Simone Ulmer, CSCS on the HPC-CH website.