TR-60 



TECHNICAL REPORT 



FROST DEGREE DAY, RELATED ICE THICKNESS 



CURVES, AND HARBOR FREEZEUP AND BREAKUP 



DATES FOR SELECTED ARCTIC STATIONS 



FRANKLIN E. KNISKERN 



and 

 GABRIEL J. POTOCSKY 



Forecasting Branch 

 Oceanographic Prediction Division 



JULY 1965 



U. S. NAVAL OCEANOGRAPHIC OFFICE 



WASHINGTON, D. C. 20390 



Price $1.50 



