. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. FINGER LAKES OF NEW YORK. 231 radiation from the sun is sure to be variable; the approach to the sun of a white cloud momentarily raises the radiation and unnoticed wisps of cloud may reduce it. In the series it is clear that the mean of the readings at 200 cm. is too low as compared with all of the others, since the transmission in the i to 2 m. stratum should be about the same as below. The value of per cent has been assumed, therefore, for the 200 cm. level and a mean transmissio
. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. FINGER LAKES OF NEW YORK. 231 radiation from the sun is sure to be variable; the approach to the sun of a white cloud momentarily raises the radiation and unnoticed wisps of cloud may reduce it. In the series it is clear that the mean of the readings at 200 cm. is too low as compared with all of the others, since the transmission in the i to 2 m. stratum should be about the same as below. The value of per cent has been assumed, therefore, for the 200 cm. level and a mean transmission of about 66 per cent per meter. Under these condi- tions about 99 per cent of the sun's energy would be delivered to the upper 8 m. of water, somewhat more than 80 per cent going to the first meter, or with mean sun about 82 per cent. It will be noted that corresponding with the smaller transparency of the water, as compared with Seneca Lake, the transmission of radiation is decidedly lower. Table 14.âTransmission of Sun's Energy by Water of Canand.^igua L-\ke, Jixy 27, 1918, A. M. TO P- M., TiME. (See fig. 5.)' [Note.âSky hazy. Transparency of water m. Transmission per meter about 60 per cent.] Per cent radiation remaining at depth indicated. Depth in centimeters. Per cent radiation remaining at depth indicated. Depth in centimeters. Observed per cent. Computed per cent. Observed per cent. Computed per cent. Vertical sun. Mean sun. Vertical sun. Mean sun. 100 "â 3 19-4 12. 2 10. 7 4- 2 3- I 3- I 3-7 aoo 300 B 250. Fig. 5.âWork curves for Canandaigua Lake. (See explanation, fig. i.) The observations on Canandaigua Lake were also somewhat irregular, not on account of clouds, but haze. The sky was cloudless, but the hills a few miles up the lake were nearly invisible in the haze which filled the valley. Under such conditions the value of the sun's radiation is much reduced, and it was found to be about
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