This report is a continuation of the current observational program and presents data on ice thickness during the 1960-61 and 1961-62 seasons. The network has been expanded to Alaska during this period and some station changes have taken place. These changes are discussed and some supplemental ice thickness data for two stations on the east coast of Greenland are presented. The data are presented in their original form in order to make them fully available to potential users. Analysis has been limited to a study of maximum ice thicknesses. (Author).

Analyses weekly measurements of thickness of these ices made over period of 10 to 15 years at 66 locations. Studies especially effect of thawing temperatures.