Abstract
AN interesting memoir on the climate of Bagdad (“Sul Clima di Bagdad”), by Prof. Filippo Eredia, appears in a recent issue of the Bollettino della Reale Societa, Geografica Italiana, under the auspices of which a mission was dispatched in 1908, led by Dr. A. Lanzani. Prof. Eredia summarises the more salient features of this expedition's work, and further utilises information given in various papers by Eliot, Hann, and Gilbert Walker. Bagdad is in lat. 33° 19′ N., long. 44° 26′ E., the height of the cistern of the barometer above sea-level being 127 ft. The mean barometric pressure at 32° F. sea-level and lat. 45° is 29-893 in., being highest, 30-149 in., in January, and lowest, 29-543 in., in July, a variation in the monthly means of 0-60 in. The mean annual temperature is 73-0° F., ranging from 94-5° in July and August to 48-9° in January. The mean of the daily maxima is 86-0°, the mean monthly values ranging from 109-9° in August to 59-5° in January. The mean of the night minima is 60-1°, highest in July, 79-5°, and lowest in January, 38-1°. The highest temperature recorded was 122°, and frost is not uncommon from November to February. The mean daily range of temperature varies from 33° in August and September to 20° in December. The relative humidity is 58, rising to 80 per cent, of saturation in December and January, and falling to 38 per cent, in June: The mean cloud amount (over-cast sky=100) is only 16, the extremes being 29 in March and 1 in July. Various authorities place the annual rainfall between 6-94 in. and 9-04 in., practically all of which falls between November and April. June, July, and September are rainless, but slight showers have fallen in May, August, and October.
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M., R. Reports on Climates. Nature 100, 195 (1917). https://doi.org/10.1038/100195a0
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DOI: https://doi.org/10.1038/100195a0