saltation

Oceano Dunes field setup

An array of instruments measuring wind, aeolian saltation, surface evolution, and dust generation.  Labels for instruments are as follows:

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Field saltation observations

Raw and processed data from three field campaigns on active aeolian saltation:

  • Jericoacoara, Ceara, Brazil, November 2014
  • Rancho Guadalupe, California, USA, March 2015
  • Oceano, California, USA, May-June 2015

Data can be accessed through Google Drive.

"Raw" data folder contain both:

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Wenglor YH03PCT8

The Wenglor YH03PCT8 particle counter counts the passage of particles by measuring the attenuation of transmitted laser beam on one side of the instrument fork in the receiver on the other side of the fork.  When the received signal drops below 90% of the full transmission value for the sensor, the instrument sends an electrical pulse, which can be counted by a datalogger.  In this way, one can construct a high-frequency timeseries of aeolian saltation flux.

Wenglor laser particle counters for saltation measurement

The Wenglor YH03PCT8 can be used to count the passage of particles transported by aeolian saltation.  However, care must be taken to convert the raw count values from the sensors to information about the mass flux of saltators.

We address these issues by taking two primary steps:

1. Set up Wenglors at multiple heights, to capture the full profile of saltation

2. Set up "BSNE" sand traps adjacent to the Wenglor tower to calibrate from relative numbers of particle counts to absolute measure of transport flux

Measuring active aeolian saltation

Deployment of field coupled wind and sand transport instruments to monitor aeolian saltation.