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I.—An Experimental Investigation of the Temperature Changes occurring in Fresh-Water Lochs.

Published online by Cambridge University Press:  15 September 2014

E. M. Wedderburn
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Extract

In a previous communication published in the Transactions of the Society (vol. xlv., part ii., p. 407) I attempted to discuss the temperature observations made in Loch Ness during the years 1903 and 1904. Some of the conclusions which I arrived at have not been generally accepted, and in particular limnologists have been slow to acknowledge the existence of the temperature seiche first described by Mr Watson, and which I consider was fully borne out by the observations published in my previous communication. In order to get some ocular demonstration of the possibility of such a phenomenon, I had recourse to laboratory experiments, and it is the description of these experiments which is the main object of the present communication. Besides demonstrating the nature of the temperature seiche, the experiments also throw light on the formation of what has been called by German and Austrian writers the Sprungschicht, and which I now propose to call in English the ‘discontinuity layer,’ which, with the word Sprungschicht, has the merit of being descriptive.

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 28 , 1908 , pp. 2 - 20
Copyright
Copyright © Royal Society of Edinburgh 1908

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References

page 2 note * See Pet. Geogr. Mitt., L.B., p. 170.

page 5 note * The apparatus which I used belongs to the Natural Philosophy Department of the University, and was put at my disposal by Professor MacGregor.

page 5 note † Proc. Roy. Soc. Ed., vol. xxvi., part iii., p. 142.

page 7 note * See also p. 11.

page 8 note * The term “windward” is used for “leeward,“ and vice versa, on pp.416 and 418 of my paper on Lake Temperatures in Trans. R.S.E., vol. xlv., part ii., p. 409.

page 9 note * It may be, however, that the temperature distribution given in fig. 4 shows the beginning of a temperature bore. The observations from which the diagram is drawn were taken shortly after the cessation of a heavy wind, and the observers may have lighted on this bore. This diagram is further referred to on p. 20.

page 11 note * The colouring liquid I used in these experiments to make currents evident was black alcohol stain, formed by a mixture of alcohol and lamp-black.

page 13 note * Fig. 7 shows diagrammatically the current-system which is indicated by these experiments.

page 16 note * Geographical Journal, July 1904. p. 74.