1 Lamont-Doherty Earth Observatory of Columbia University, Columbia University, Palisades, NY 10964; [email protected][email protected].
2 Lamont-Doherty Earth Observatory of Columbia University, Columbia University, Palisades, NY 10964.
3 State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China; [email protected][email protected].
4 Geological Survey of Israel, Jerusalem 95501, Israel.
5 State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China.