Durand, Loyal, Jr. (ed.) / Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume XXXI (1938)
Whitney, Lester V.
Continuous solar radiation measurements in Wisconsin lakes, pp. 175-200 PDF (7.7 MB)
I I I - - TROUT LAKL ~70 I I I o CLEAR ' CLOUDY 1 —- 8 . . eJ .5~ .4~ ~30~ V U ~ o 0 0 TRANJM!ss/oN OP 1/vt. OP WA TER 0 AM 0 7ItANJM/JS/ON fROM &/RPACE 12? IM. T~M~ 8 0 0 1 IC I I 3/X C 3 4 5PM I I I I 184 Wisconsin Academy of Sciences, Arts, and Letters covered and uncovered frequently by clouds, energies represented by individual points were added up for a period of about a half-hour and average transmissions calculated. Such values could not be weighted highly because of the greater probable error of -individual points; however, these values did not differ materially from others found. - The first transmission curves drawn, shown on Figures 4 to 7, are averages from many records. In any one day there are variations brought about by such natural causes as haziness, waves, and intermittent clouds; it was thought that experimental errors would average out arid regular trends become more apparent. ~ -o_a~. ~ - 8 FrG. 4. Transmission for Trout Lake, July 1935. The results for Trout Lake (Figure 4) were based on records for nine days; five of which were clear, two were partly clear, and on two the sky was evenly clouded. Results for Crystal Lake (Figure 5) were based on records for eight days, clear and cloudy weather being about equally divided. Results for Boulder and Muskellunge lakes (Figures 6 and 7) were based on one clear and one cloudy day for each. After the work on Crystal Lake the time remaining was short, but it was found that one good clear day record and one good cloudy day record were sufficient. As it happened, iecords for both Boulder and Mus
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