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<br />.... 300 <br />..0 <br />E <br />..... <br />-l <br />ILl <br />> 400 <br />ILl <br />-l <br />ll. <br />0 <br />~ <br />0 500 <br />~ . <br />0 <br />-l . <br />0 <br />0 600 <br />ILl <br />:> <br />0:: <br />ILl <br />en <br />m <br />0 700 <br /> 700 600 500 400 300 <br />"- ENTRAINMENT LEVEL (mb) <br /> <br />. <br /> <br />. <br /> <br /> <br />o MAY 21, 1978 <br />~ MAY 23, 1978 <br />o JUNE 2, 1978 <br />. JUNE 15, 1978 <br />IKJ JULY 8, 1978 <br />. JULY 15, 1980 <br />I). AUGUST 5, 1980 <br />6 AUGUST 17, 1980 <br /> <br />Fig. 2.14: The cloud top level vs the deduced entrainment level at the <br />time of entrainment. (From Boatman, 1981.) <br /> <br />al. (1982b,c). <br /> <br />selection passes for the 20 HIPLEX-l clouds were shown in Cooper et <br /> <br />These data show that changes are typically greater <br /> <br />than 0.5 g/m3 within 300 m of cloud edge, and in one case (cloud #2) <br /> <br />the liquid water content went from 2.28 g/m3 to 0 in 200 m. <br /> <br />Furthermore, the liquid water content seldom displayed a gradual <br /> <br />erosion from midcloud outward toward the edges, but instead, was often <br /> <br />chaotic with areas of near zero liquid water content in the middle of <br /> <br />the cloud. These data strongly suggest that lateral entr~inmen~.~E?ugh <br /> <br />the edges of HIPLEX-l c~s~~~~s_!:~~~_Cl.9ominant feature. <br /> <br />Cooper et al. (1982b) presented calculations for one case study <br /> <br />(cloud #2) which showed that entrainment of air from near cloud top <br /> <br /> <br />caused very rapid dilution of the cloud at the -80C level. In this <br /> <br />case, a dilution of 2: 1 (environmental to cloud-base air) was <br /> <br />23 <br />