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<br />. <br /> <br />In 1979 and 1980, the cloud base temperature was determined at the <br /> <br />start of each fl ight and was recorded on the data tapes. Where there was <br /> <br />. <br /> <br />uncertainty (as when the initial climb was far from the clouds), the <br /> <br />need for an accurate value of cloud base temperature led us to descend <br /> <br />and remeasure (except in those cases where the Twin Otter was available <br /> <br />. <br /> <br />and could report an accurate cloud base temperature to us). Thus the <br /> <br />1979 and 1980 data set is particularly complete and accurate. The 1978 <br /> <br />observations were less systematic, but generally the King Air crew <br /> <br />. <br /> <br />noted the cloud base temperature during climbs and those records were <br /> <br />available in the voice notes from the flights. <br /> <br />In a few cases, to <br /> <br />complete the sample, we have determined cloud base temperatures in <br /> <br />. <br /> <br />1978 from the climb-out sounding by the King Air. <br /> <br />Fig. 2.1 is a histogram of cloud base temperature for 70 days in <br /> <br />1978-1980 on which CuCg clouds were studied. (Only days from June and . <br /> 25 100 <br /> --' <br /> '/ <br /> .../ <br /> 20 "... 80 <br /> I - <br /> I :te . <br /> 0 <br /> I - <br />U I <br />15 '" IJJ <br />0 '" 60 <br />....... '" > <br /> '" <br />0:: '" .... <br />IJJ <br />m <( <br />:E 10 40 ..J <br /> ::) <br />::) :E . <br />z ::) <br /> u <br /> 5 20 <br /> 0 0 . <br /> -10 5 10 15 <br /> CLOUD BASE TEMPERATURE (OC) <br /> <br /> <br />Fig. 2.1: Differential (solid line) and cumulative (dashed line) <br />frequency distributions for the measured cloud base temperatures from <br />70 days in June and July, 1978-80, on which research flights were <br />conducted in the Miles City area. <br /> <br />. <br /> <br />4 <br /> <br />. <br />