Ice-Covered Lakes Environment - Freezing of Lakes and the Evolution of their Ice Cover - page 254

Fig. 8.5 Ice chart conditions in the Great Lakes on March 4, 2013 (Canadian Ice Service,
Environment Canada). The “ WMO egg code ” symbols show total ice concentration on the first row
and partition into subclasses with own concentration, stage of development and ice floe size in the
next three lines. See http://ec.gc.ca/glaces-ice/
Fig. 8.6 Ice blocks are taken
from the small lake,
Kupparlampi in Hausj ä rvi
commun, southern Finland, in
the 1930s. This ice was used in
summer to keep milk products
cold in Jaakkola farm.
Photograph by Kalle Kalervo.
© Sarka, The Finnish Museum
of Agriculture, Loimaa