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<br />2174 <br /> <br />JOURNAL OF THE ATMOSPHERIC SCIENCES <br /> <br />VOLUME 35 <br /> <br /> <br />1 rom I <br /> <br />Unrimed Plane Dendrites <br /> <br /> <br />~.'1'..,., <br />..,,": . <br />...... . <br />I....'. -.. <br />..i' :..~. r <br />::\.:'..> ~.' <br />j . <br />-.' : <br />,-. I . . <br />. ~....- ,.,,-, <br />:. ~.z -;:...~.:........~ .... <br />...~.,. c." ~ . <br />.'~ \ .~'"-. .~ "":" . <br />r,O '.'iI!''\!II' <br />.......'"' '.'. .. ... <br />;;; ~~. ,'. <br />. -..:4/~' .~ '.. <br />...~L~,...'\. <br />~ "'~ --'. <br />" ,~. <br />..1 ''''. . ~ . <br />....iN.. ,.}~.~. <br />..~t '.' . ~ . <br />-::,:.': : ;,.'.:~ .... ..' <br /> <br />1 rom <br /> <br />Lightly-Rimed Plane Dendrite <br /> <br /> <br />1 rom <br /> <br />-i <br /> <br />Heavily-Rimed Plane Dendrite <br /> <br />:I)"~' . . ; 'ff; <br /> <br /> <br />" ." <br />.j, '. . <br />"!' <br /> <br />~~~f <br /> <br />" <br /> <br /> <br />.. <br />. ,. <br />a <br />'. '1 <br /> <br />1 rom <br /> <br />Lightly-Rimed Spatial Crystal <br /> <br /> <br />1 rom <br /> <br />Graupel <br /> <br />FIG. 4. Examples of each of the five crystal types studied. <br /> <br />camera malfunctioned and the frame rate was ques- <br />tionable the data were not used. <br />Fig. 3 shows a sequence of six frames taken during <br />the collision of a heavily rimed plane dendrite with <br />the plate. This particular crystal produced 15 frag- <br /> <br />ments. The quality of the photographs in Fig. 4 are <br />not as good as the direct projection of the original <br />film on a screen. Consequently, some of the smaller <br />fragments cannot be distinguished in this sequence. <br />The minimum detectable size of fragment which <br /> <br />