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Unsteady aeolian saltation

  • Zhen-Ting Wang
  • Chun-Lai Zhang
  • Song-Bo Cen
Regular Article
  • 34 Downloads

Abstract.

Wind velocity and saltating grain count rate in the natural unsteady aeolian sediment transport are synchronously measured on the gently inclined windward slope of one horn of a large barchan. The obtained time series of these two variables are analyzed, by using the improved complete ensemble empirical mode decomposition and wavelet coherence, to investigate the wind-saltation interactions at different timescales. It is found that the wind-saltation trend relation obeys the traditional low-order polynomial expressions, and saltation mode is roughly proportional to its corresponding wind mode if they are strongly correlated. As a conclusion, it is probable to partly predict instantaneous saltation activities near the surface by the empirical trend and effective modes of wind speed at a given height.

Graphical abstract

Keywords

Flowing Matter: Granular Matter 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Northwest Institute of Eco-Environment and ResourcesCASLanzhouP. R. China
  2. 2.State Key Laboratory of Earth Surface Processes and Resource Ecology, MOE Engineering Research Center of Desertification and Blown-sand Control, Faculty of Geographical ScienceBeijing Normal UniversityBeijingP. R. China

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