by K.E. Chilton
This was written to augment a talk by Robert G. Speck to the Discussion Group of the Hamilton Centre of the Royal Astronomical Society of Canada on April 22, 1976.
PRE-MARINER FINDINGS
Three main cloud types have been distinguished in the thin, dry, cold Martian atmosphere: white, blue and yellow clouds, so named for the colours which they predominantly reflect.
White Clouds:
White clouds vary considerably in thickness, brilliance and extent. They can be subdivided into three categories: