The Norwegian North Polar Expedition, 1893-1896 Volume 6; Scientific Results (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 Excerpt: ...deviations from the monthly mean in hundredths of a millimetre. From this Table are computed the means for the four meteorological seasons, for the dark and sunny seasons, the equinoctial months, and for the whole year. 001 mm. From these Tables and the diagrams on PI. VI. (1 cm. = 0-l mm.) arc taken out the epochs and the values of the diurnal Minima and Maxima, and the diurnal Range as shown in the following Tables. January, February...., March, April May June July August, September... October November.... December.... Winter Spring Summer Autumn...... Dark Season.., Sunny Season. EquinocL Month Year The diurnal period comes out very distinctly in all months except November, with a minimum in the early morning hours and a maximum some hours after noon. The range is greatest in May and has a second maximum in September. It is least in the dark season, only a few hundredths of a millimetre. THE ANNUAL PERIOD. The following Table gives the mean tension of vapour for each month, Annual Mean 156 mm. Minimum 022--January 21st Maximum 431--July 20th Range 409--The march of the values of the tension of vapour is very regular from month to month. PI. VI. (1 cm. = 1 mm.) ATMIC WIND-ROSES. The numbers in the following Tables have been computed in the same manner as the numbers of the dynamic, baric, and thermal Wind-Roses. ATMIC WIND.ROSES. Weighted and smoothed means, mm. As a rule the southerly to westerly winds bring most vapour into the atmosphere, and the northerly winds less. March, June, August and September exhibit a smaller maximum with north-easterly winds. PI. VI. (1 cm. = 1 mm.) The vapour-tension with calms, for each month, is generally of the same amount as the mean value, and shows an analogous annual range. Its maximum falls i...