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Sliding Rocks on Racetrack Playa, Death Valley National Park: First Observation of Rocks in Motion

Figure 5

Weather record from Racetrack Playa, Death Valley National Park.

Temperature (red line), 1 hour average wind velocity (black line), insolation (blue line), and rainfall (filled blue line) for November 20, 2013 to January 9, 2014. Wind gusts shown in Fig. 9. Red arrows indicate known rock movement events; there have been additional movement events not recorded by direct observations. Movement events 1 and 2 are recorded by instrumented rocks, and direct observations were made for events 2–4. Time lapse camera observation shows ∼20 cm of snow accumulation on November 23. Total precipitation is likely under-recorded because our weather station does not record precipitation due to snow. Data reported in Table S1.

Figure 5

doi: https://doi.org/10.1371/journal.pone.0105948.g005