Visible and infrared digital photos around the entrances at Cueva Arenal
by Juan Corrin, July 2017.
(See also the IR page)
A1, 2: Looking up to the entrances on a ledge halfway up the photo. The blue
cascade images the colder temperature of the rock and vegetation caused by
the cold draught.
A3, 4: Looking east across the ledge to the eastern entrance with the
draughting middle entrance on the right of the picture.
B1, 2: The strongly draughting middle entrance.
B3, 4: The cold ground outside the middle entrance looking west.
C1, 2: The cascade of cold air over the edge, flowing from left to right.
C3, 4: The middle entrance.
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