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Fire scars in the desert

Wednesday 15 June 2005

I enjoyed the startling calligraphy of these fire scars in the Simpson Desert.

The fire scars were produced in a recent fire, probably within the last year. The image suggests a time sequence of events. Fires first advanced into the view from the lower left​—​parallel with the major dune trend and dominant wind direction. Then the wind shifted direction by about 90 degrees so that fires advanced across the dunes in a series of frond-like tendrils. Each frond starts at some point on the earlier fire scar, and sharp tips of the fronds show where the fires burned out naturally at the end of the episode. The sharp edges of the fire scars are due to steady but probably weak southwesterly winds—weaker winds reduced sparking of additional fires in adjacent scrub on either side of the main fire pathways. Over time, the scars will become less distinct as vegetation grows back.

Space photo of fire scars

Photograph taken 23 November 2002 by a crew member on the International Space Station, using an 800 mm lens on a Kodak 760C digital camera.

filed under Environment + Photography

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