Aeolian saltation fieldwork: values for impact and fluid threshold analysis

Excel spreadsheet (.XLSX) containing the following information for the analysis of impact and fluid thresholds presented by Martin and Kok (2017), for averaging interval of 2 seconds and analysis interval of 1 minute. Data are from field deployments at Jericoacoara (Brazil), Rancho Guadalupe (California), and Oceano (California). The spreadsheet contains the following fields: Date of analysis interval (“Date”). Start time of analysis interval (“StartTime”). End time of analysis interval (“EndTime”). Calculated transport activity (“f_Q”). Calculated effective threshold wind speed (“u_th”) in m/s. This value is undefined (“NaN”) for intervals with f_Q = 0 or f_Q = 1. Fluid threshold hypothesis predicted transport activity (“f_Q_ft”). Impact threshold hypothesis predicted transport activity (“f_Q_it”). Dual threshold hypothesis predicted transport activity (“f_Q_dual”). Stability parameter (“z/L”) obtained from wind speed fluctuations in corresponding 30-minute time interval. This value is sometimes undefined (“NaN”) for intervals of very weak wind. Wind direction (“theta”) in degrees. Value is relative to dominant wind direction at site. The field measurements from which these values were calculated are described in Martin et al. (2017). <strong>References:</strong> Martin, R. L. and J. F. Kok (2017), Field evidence for fluid and impact thresholds in aeolian saltation, <em>arXiv:1610.10059v3</em>. Martin, R. L., J. F. Kok, and M. Chamecki (2017), Comprehensive field campaigns illustrate new methods for characterizing high-frequency variability in aeolian saltation flux, <em>arXiv:1609.08707v2</em>.