Aeolian Saltation Fieldwork: Values For Size-Selective Transport Measurements
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This excel spreadsheet (‘SizeSelectiveTransport.xlsx’) contains the following information on surface and airborne particle size distributions (PSDs) for size-selective saltation transport analyses at our six field sites (Jericoacoara, Rancho Guadalupe, Oceano N1, Oceano S1, Oceano N2, Oceano S2): <strong>“d_lower_mm”</strong> – Lower limit diameter for each particle size bin [mm]. <strong>“d_mid_mm”</strong> – Midpoint diameter for each particle size bin [mm]. <strong>“d_upper_mm”</strong> – Upper limit diameter for each particle size bin [mm]. <strong>“dVdlnd_bed”</strong> – Site-averaged normalized volume fraction in each size bin for surface samples, \(\frac{dV_{bed}}{d\ln(d)}\). The field measurements from which these values were calculated are described in Martin and Kok (2017). <strong>“dVdlnd_air”</strong> – Site-averaged normalized volume fraction in each size bin for airborne samples, \(\frac{dV_{air}}{d\ln(d)}\). Site-averaged normalized volume fraction in each size bin for airborne samples, conditioned on each normalized shear stress range, \(\frac{dV_{air}}{d\ln(d)}|_{\tau/\tau_{it}}\). Cases in which a PSD is lacking for a shear stress range are marked as “NaN”: <strong>“dVdlnd_air_taunorm_below_10”</strong> – for \(\tau/\tau_{it} \leq 1.0\) <strong>“dVdlnd_air_taunorm_10_15”</strong> – for \(1.0 < \tau/\tau_{it} \leq 1.5\) <strong>“dVdlnd_air_taunorm_15_22</strong>” – for \(1.5 < \tau/\tau_{it} \leq 2.2\) <strong>“dVdlnd_air_taunorm_22_30”</strong> – for \(2.2 < \tau/\tau_{it} \leq 3.0\) <strong>“dVdlnd_air_taunorm_30_40”</strong> – for \(3.0 < \tau/\tau_{it} \leq 4.0\) <strong>“f_bed”</strong> – Fraction of bed surface particles in size bin <em>i</em>, \(f_{bed,i}\). Fraction is computed only for bins with particle diameter <em>d</em> > 1.3 mm. Bins below this value are marked as “NaN”. <strong>“f_air_bar”</strong> – Mean fraction of airborne particles in size bin <em>i</em>, \(\langle f_{air,i} \rangle\). Fraction is computed only for bins with particle diameter <em>d </em>> 1.3 mm. Bins below this value are marked as “NaN”. <strong>“f_air_sigma”</strong> – Uncertainty on mean fraction of airborne particles in size bin <em>i</em>, \(\sigma_{\langle f_{air,i} \rangle}\). “NaN” values correspond to undefined values for f_air_bar. <strong>“zqi_air_bar”</strong> – Mean size-selective saltation layer height for size bin <em>i</em>, \(\langle z_{q,i} \rangle\). Fraction is computed only for bins with particle diameter <em>d</em> > 1.3 mm. Bins below this value, as well as bins for which insufficient well-fit \(z_{q,i}\) are available for computation of mean, are marked as “NaN”. <strong>“zqi_air_sigma”</strong> – Uncertainty in mean size-selective saltation height for size bin <em>i</em>, \(\sigma_{\langle z_{q,i} \rangle}\). “NaN” values correspond to undefined values for zqi_air_bar.
