55.8 MB (5.2 MB compressed)
5403 x 3607 pixels
45.7 x 30.5 cm ⏐ 18.0 x 12.0 in (300dpi)
PEKKA PARVIAINEN / SCIENCE PHOTO LIBRARY PEKKA PARVIAINEN / SCIENCE PHOTO LIBRARY
Mackerel sky. A region of altocumulus cloud. This is often called a 'mackerel sky', due to the resemblance to the scales of a mackerel. Altocumulus is a middle-altitude water or mixed water/ice cloud. With sufficiently low temperatures, ice crystals may form and act as nucleation sites for snow.
Model release not required. Property release not required.