Durand, Loyal, Jr. (ed.) / Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume XXXI (1938)
Whitney, Lester V.
Microstratification of inland lakes, pp. 155-173 ff. PDF (5.7 MB)
166 Wisconsin Academy of Sciences, Arts, and Letters LAKE MENDOTA STATION 2. SEPT. 3 SEPT. 26 OCT. 8. I I I ' p I [~1 LAKE MENDOTA STATION - I. SEPT 28 ~ OCT ~ 8 FIG. 6-. Transparency curves for Lake Mendota. in the shallower water near shore should be closer the surface. On Oct. 8, with the lake much calmer, there was less difference in depth between first minima for the two curves. A comparison between the four curves taken Sept. 26 and Oct. 8 shows more similarity between curves taken at the same station than between curves taken on the same day. Scattering. Several sets of transparency and scattering readings were taken, and Figure 7 shows a typical pair. Notice that the transparency readings in the lower water again were so small that the sensitivity had to be made about 20 times larger than for readings taken above. The more scattering particles there are in water, the lower the transparency should be and the higher the scattering. The curves for the lower water show some of the expected antisymmetrical characteristics. For example, the transparencey minimum at 19.3 m. is matched by a scattering maximum; the transparency maximum at 20.2 m. is matched by a less pronounced scattering minimum. However, the sudden and permanent decrease in transparency at about 17 m. is not accompanied by a permanent rise in scattering. The scattering does increase at
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