Table 2.

Scales of the theoretical time needed for the BJD and CLP formation with the Gobi Desert as the sole availability.

Wanted time scales	BJD (ka)	CLP (ka)
Minimum	58.1	3,072.1
Maximum	103.4	6,269.0
Average	80.8	4,475.9

The estimation was based on modern wind regime recorded in Ejin Station as this station is more representative than Guaizihu Station which is in front of a mountain pass with funneling effects (Supplementary Fig. S7) and located in the Gobi Desert zone (Supplementary Fig. S9).