There's two sun images here. The light next to the horizon is the full sun's disk, refracted along the surface of the water. The taller sun is an inverted (Superior mirage) caused by light reflected from a higher atmospheric layer.
Information:
Photographer: Tom Ruen
Location: Lake Superior, North shore, near Two Harbors, Minnesota
Date: July, 2002 Sunrise
Equipment: Digital camera, hand-held with binoculars