1. School of Geographical SciencesUniversity of Nottingham Ningbo China 199 Taikang East Road, Ningbo 315100 Zhejiang P.R. China
2. Geomorphology & Glaciology, Department of Physical GeographyStockholm University, Stockholm, Sweden and Bolin Centre for Climate Research, Stockholm University Stockholm Sweden
3. Department of Earth, Atmospheric, and Planetary SciencesPurdue University West Lafayette USA
4. Department of Earth SciencesUniversity of Gothenburg Gothenburg Sweden
5. Department of Physics and AstronomyPurdue University West Lafayette USA