Table 1 Grain size, saltation profile, and flux law fit values.

d50 is the median grain diameter for surface samples. Full grain-size distributions for field sites can be found in the study of Martin et al. (83). Farrell et al. (59) did not report a surface grain size, and Greeley et al. (57) and Namikas (58) did not report associated uncertainties. 〈zq〉 is mean saltation layer height. 〈zq〉/d50 is the ratio of saltation height to grain size. τit and u*,it are best-fit saltation impact threshold shear stress and shear velocity, respectively, for the linear flux law. CQ is the best-fit scaling parameter for Eq. 10 for each site. Included uncertainties here and elsewhere represent 1 SD.

Location/studyd50 (mm)zq〉 (m)zq〉/d50τit (Pa)u*,it (m s−1)CQ
Jericoacoara0.53 ± 0.040.097 ± 0.005184 ± 100.135 ± 0.0150.341 ± 0.0197.3 ± 0.9
Rancho Guadalupe0.53 ± 0.030.107 ± 0.005202 ± 100.110 ± 0.0210.300 ± 0.0285.8 ± 0.5
Oceano0.40 ± 0.070.055 ± 0.004138 ± 90.094 ± 0.0060.277 ± 0.0095.9 ± 1.0
Greeley et al. (57)0.230.050 ± 0.006218 ± 26
Namikas (58)0.250.049 ± 0.003197 ± 11
Farrell et al. (59)0.081 ± 0.008