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Springtime Frost Frequency Near LaCrosse, Wisconsin, As Affected by Topographic Position, and Its Relation to Potential Reforestation Problems

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Abstract:

Records obtained in a 2-year period (1960 and 1961) in hilly terrain in the unglaciated section of southwestern Wisconsin near La Crosse showed that the springtime frost frequency between April 26 and July 1 was about twice as high in a cove at 920 feet elevation as on a nearby ridgetop at 1,250 feet elevation. Freezes of 30° F. or less occured three times as often in the cove. The degree-hours of frost of 30° F. or less in the period were eight times as abundant in the cove as on the ridgetop. For freezes of 28° F. or less, the cove had 67.5 degree-hours compared to none on the ridgetop. In the cove, temperatures reached minima of 1.0 to 10.5° F. colder than on the ridge in eight of nine times on which freezes occurred in this period; these minima on six occasions were at least 3° F. colder for the cove. The temperature inversions were greatest on calm, clear nights. Long-term records over an 89-year period at La Crosse indicate there is probability of a freezing temperature on the average of about once every 2½ years in May.

Document Type: Journal Article

Affiliations: Senior Soil Scientist, Lake States Forest Expt. Sta., St. Paul, Minn.

Publication date: May 1, 1963

More about this publication?
  • The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.
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