Continuing the work begun by Tilton ('15-'16) and Birge and Juday ('19), the writer has, since 1922, made daily observations of the water temperatures of Lake Okoboji. Sample readings have been reported from time to time. Temperature curves for the several years under observation show considerable variation in the degree of zonation. Tilton's curves do not show any marked differentiation into epilimnion, thermocline, and hypolimnion. On the other hand in 1919 Birge and Juday's observations show a very distinct zonation. This is even more marked in the curves for 1922 (Stromsten '23) and reaches its climax in 1923 (fig. 1). In 1924 the zonation becomes less distinct (fig. 1) while in 1925 no distinct thermocline seems to have developed.
Proceedings of the Iowa Academy of Science
©1926 Iowa Academy of Science, Inc.
Stromsten, Frank A.
"Temperature Studies of Lake Okoboji for 1925,"
Proceedings of the Iowa Academy of Science, 33(1), 299-302.
Available at: https://scholarworks.uni.edu/pias/vol33/iss1/94