Measurements of Dust Devil Lower Structure and Properties, El Dorado Valley, Nevada, June 2002

Details Measurements of Dust Devil Lower Structure and Properties, El Dorado Valley, Nevada, June 2002 Measurements of Dust Devil Lower Structure and Properties, El Dorado Valley, Nevada, June 2002

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufm.p51a0342t&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #P51A-0342

Physics

3307 Boundary Layer Processes, 3322 Land/Atmosphere Interactions, 3346 Planetary Meteorology (5445, 5739), 5409 Atmospheres: Structure And Dynamics

Scientific paper

We report the results of a recent field campaign in Nevada, USA, carried out to investigate the lower structure (less than 2m) and dust lofting mechanisms of terrestrial dust devils. Over several days, an instrumented platform was repeatedly deployed from the back of a pickup truck into the path of oncoming dust devils. Around 40 events were recorded, including core penetrations of large and small dust devils, close misses and periods of ambient background conditions before and after dust devil events, and during periods of dust devil inactivity. The platform deployed consisted of a 2 by 1m base with a 2m mast and carried a total of 24 instruments. The instrument suite consisted of horizontal wind profiling down to 5mm above surface, vertical wind speed and direction, temperature and pressure profiling, airborne and saltating particle recorders, vertical electric field gradient measurements, and upward looking UV sensors. We present preliminary results of profiles for several events, together with details of ambient conditions required for dust devil formation.

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