REVIEWS 



Influence of Forests upon the Melting of Snozu in the Cascade Range. 

 By Alfred A. Griffin. Reprinted from !\[onthly Weather Review, July, 

 1918, 46, pp. 324-327, 3 figures, 4 tables. (Dated Portland, Oregon, 

 April, 1918.) 



Up until very recently American foresters have been compelled to 

 turn wholly to European investigators for data relating to the influence 

 of forests upon the melting of snow, but during the last five years 

 several papers have appeared dealing with xA.merican conditions which 

 are beginning to make us more independent of these Old World 

 sources. Fernow's excellent review^ of meteorological observations in 

 Europe shows that snow is held longer and more continuously in for- 

 ests, and that the melting of snow is retarded by from five to eight 

 days (in Switzerland) and very often as long as several weeks. Pear- 

 son,- in a meteorogical study of western yellow pine forests in Arizona 

 and New Mexico, carried out from 1909 to 1912, found that snow fell 

 more evenly and accumulated to a slightly greater depth in the park 

 than in the forest in the winter time, but that it remained on the ground 

 from two to three weeks later in the forest, and that a greater portion 

 of the snow waters was absorbed by the soil in the forest than in the 

 park. Jaenicke and Foerster," working in the same type of forest in 

 Arizona, from I9io.to 1913, found that heavy drifts of snow persisted 

 in the forest for two or more weeks after the total disappearance of 

 the snow in the open parks. The present study deals with an entirely 

 different part of the country, namely, the Columbia River watershed in 

 Oregon and Washington. In the forests of this region it was found 

 that snow remains an average of 17 days longer in the forest than in 

 the open. Thus, again, are the results of both American and European 

 investigators corroborated upon this important subject. 



Members of the United States Forest Service carried out these 



* Fernow, B. E. : Forest Influences. Forestry Division, Bulletin Xo. 7. pp. 

 20, 137, 152. Washington, D. C, 1893. 



^Pearson, G. A.: A Meteorological Study of Parks and Timbered Areas in 

 the Western Yellow Pine Forests of Arizona and New Mexico. Monthly 

 Weather Review, 41, pp. 1615-1629, 1913. 



'Jaenrcke, A. J., and Forester, M. H. : The Influence of a Western Yellow 

 Pine Forest on the Accumulation and Melting of. Snow. Monthly Weather 

 Review, Alarch, 1915, 43, pp. 115-126, 9 figures aiid 23 tables. 



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