Abstract
SIX parts of the new Professional Notes of the Meteorological Office have now been issued. The first1 deals with the relation between cloud and wind odirection at Richmond, and gives tables for each month for 10h., 16h., and 22h. for fifteen years, showing the number of times each cloud amount was associated with each wind direction or with calms; it would perhaps have been clearer if percentage values had been given. Several important points come out, such as the well-known tendency of cloud to disperse at night, but it is also shown, that this tendency is not the same for all winds or for all seasons. Cloud forecasting became important during the war, and will in future be of wide application; it is to be hoped, therefore, that Lieut, (now Capt.) Brunt will fulfil his intention of continuing this research. Tables also give values for Greenwich for January and July, and various differences from Richmond are apparent; Richmond had only 59 calms in 180 months, while Greenwich had 58 in 20 months, which indicates, perhaps, a difference in estimating light winds. Greenwich had more south-west and fewer south and north-west winds than Richmond, due probably to local exposure.
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Professional Meteorology . Nature 104, 675 (1920). https://doi.org/10.1038/104675a0
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DOI: https://doi.org/10.1038/104675a0