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<br />. <br /> 250 <br /> 200 <br />a:: 150 <br />I.LJ <br />m <br />::!: <br />:::> 100 <br />z <br /> 50 <br /> 0 <br /> 0 <br /> <br />500 <br /> <br />1000 <br /> <br />1500 <br /> <br />100 <br />80 <br /> ~ <br /> 0 <br />60 I.LJ <br />> <br /> f- <br /> e{ <br />40 -J <br />:J <br /> ::!: <br /> :::> <br /> 0 <br />20 <br />0 <br />2000 <br /> <br /> <br />_........-...~ <br />~~..~.. <br />..0# <br />.' <br />..... <br />" <br />/ <br />/' <br />, <br />, <br />, <br />, <br />I <br />, <br />, <br />I <br />, I <br />I <br />, <br />, <br />I <br />, <br />I <br />, <br /> <br />.....- ...... ... <br /> <br />CONCENTRATION (cm-3) <br /> <br />Fig. 2.4: Differential (solid line) and cumulative (dashed line) <br />distributions for the cloud droplet concentration. Values are the <br />maximum I-kIn average droplet concentration measured during each cloud <br />penetration between -5 and -150C during the years 1979-1981. The <br />corrections described by Cerni (1982) were included in the calculation <br />of these values. <br /> <br />The droplet con~~~!?ns were, highly influenced ~__t!1~.I19_~yre ~f <br />the low-level flow. The highest d~op~e~t concentrations weE~"._o!>.served in <br /> <br />assoc iation with _ sout12.e_a.?t~rlY.Jlo~L___~b:iJ.IOL_,th.e . !9west: .G()ncentrations <br /> <br />were associated with northwesterly flow. The conceI1,sJ.:.~!:joD?__,cl.?$ociated. <br />with these flow reg !mes w~r~_in _tEe..EE-ng~2.?99/an3~ ~or. s.outheaste!='!y <br />flow but (4PO/cm3 ,for 'po!".tl:l..w:.es~~El.Y_fLqw.___-1he_,,__J;eaS9!1s for thiEi, <br /> <br />d if ference =_~~~~!?9_t:....E~~_(),!Y~.._~.t~E~q~IltL__,Q9t _!~__ _Cl.P~~~_~_ _9!gnifican_t <br />that cases of northwesterly flow were ofte!?-, .egst-front;al~.__~.~~~_ oJ <br /> <br />northwesterly flow were frequently associated withs=~~!.eE_ s~rface <br /> <br />temperatures a~ higher winds, both _poss!bly c~l.1_~ril~~~in<I .!~,~ize <br />the CCN concentrations that result frO!.Jl,local sOlK~e..~. <br /> <br />9 <br />