Abstract
FROM a discussion by Dr. Hann of a series of hourly summer observations of air-pressure, temperature, moisture, cloudiness, and force of wind made by the U.S. Engineer Corps on the plateaux of the Rocky Mountains (the stations lying between 3500 and 8500 feet above the sea), it appears that in valleys and wide basins, even at the greatest height, the influence of the daily barometer oscillation in summer is still very great, and no decrease with the height is noticed. The course of the curve is of the continental type, a comparatively large afternoon minimum, a slightly marked morning minimum, and an earlier occurrence (7 to 8h.) of the morning maximum. In the temperature-curve the most notable point is that the maximum is very near midday, or little behind the culmination of the sun. The maximum of absolute moisture occurs about 8 a.m., and a second smaller maximum in the afternoon or evening. The maximum of cloudiness and wind-force occurs between 3 and 4 p.m., the minimum between 3 and 4 a.m.
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Meteorological Notes . Nature 24, 266 (1881). https://doi.org/10.1038/024266a0
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DOI: https://doi.org/10.1038/024266a0