GREAT LAKES ICE COVER-WINTER 1971-72

Thirty-five ice charts were produced from data collected on 23 Lake Survey Center ice reconnaissance flights made on the winter of 1971-72. In addition, five summary ice charts, illustrating ice distribution patterns for short intervals during the winter over the entire Great Lakes, were produced from Lake Survey Center, United States Coast Guard, and Canadian ice reports. Freezing degree-day accumulations indicate that the 1971-72 winter was severe on western Lake Superior and near normal throughout the remainder of the Great Lakes. Ice formation was reported November 10 in western Lake Superior at Dulth Harbor and along the perimeter of all the Great Lakes by the end of January. The period of maximum ice cover varied from the second week of February to the last week of March for individual lakes. (Modified author abstract)

• Corporate Authors:

  National Ocean Survey

  Lake Survey Center
  Detroit, MI  United States 
• Authors:
  • Assel, R A
• Publication Date: 1972-10

Media Info

• Pagination: 61 p.

Subject/Index Terms

• TRT Terms: Aerial surveying; Ice; Ice formations; Ice phenomena; Lake ice; Nautical charts; Operations; Surveys; Weather; Winter
• Identifier Terms: U.S. National Oceanic and Atmospheric Administration
• Uncontrolled Terms: Data; Ice breakup
• Geographic Terms: Great Lakes
• Old TRIS Terms: Aerial surveys; Ice charts; Ice reporting; Ice surveys
• Subject Areas: Administration and Management; Marine Transportation;

Filing Info

• Accession Number: 00051742
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NOAA-TM-NOS-LSC-D-6 Tech Memo
• Files: TRIS
• Created Date: Mar 25 1974 12:00AM