British Rainfall 1867, p.42
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British Rainfall 1867 page 42
To those who are conversant with the partial distribution of rain in mountainous districts, this comparison will speak for itself; I therefore merely record my own satisfaction. The only anomolous circumstance developed by the year's observations, is that contary to former years more rain has been received at Styehead Tarn than at Sprinkling Tarn. Moreover the difference is considerable (10.75 inches), and is distributed with some regularity throughout the months of the year. I am unable to account for this fact. Notwithstanding the great rainfall indicated by the mountain gauges, I believe the actual amount to be much greater, and that much rain is lost to the gauges by reason of the funnels being frequently stopped up by snow and hail. At Seathwaite I have two gauges, both giving identical results under similar circumstances; the one is read daily and the other monthly. I give below the monthly returns from both, together with those from Mr. Symons's 8 in. gauge, also read monthly.
 Now it will be observed that except in those months where there was frost and snow, the difference of the receipts of the two gauges is not more than may be fairly (considering the structure of the gauges) attributable to evaporation, and I have purposely had the monthly gauge left to itself during each month, with a view to approximating to the loss in other mountain gauges from the causes indicated. If, therefore, we admit that at Seathwaite the monthly gauge has lost 11 or 12 inches from frost, snow, and ice, in a situation comparatively free from their influences, we may fairly assume that in more elevated and exposed positions the loss is in all probablity much greater, and in many cases may amount to from 12 to 18 inches in theaggregate. During the past year no accident has happened to any of the gauges, nor have I the smallest reason to believe they have been molested. |
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