1. Department of Geoscience; Aarhus University; DK-8000; Aarhus C; Denmark
2. Key Laboratory of Geographic Information Science; East China Normal University; Shanghai; 200062; China
3. Cambridge Quaternary; Department of Geography; University of Cambridge; Downing Place; Cambridge; CB2 3EN; UK
4. Centre for Past Climate Studies; Department of Geoscience; Aarhus University; DK-8000; Aarhus C; Denmark
5. Polish Geological Institute; Rakowiecka 4; PL-00-975; Warsaw; Poland
6. Department of Climate Geology; Warsaw University; Żwirki i Wigury 93; PL-02-089; Warsaw; Poland