Laserfiche WebLink
<br />I <br /> <br />I <br />I <br />I <br />I <br /> <br /> <br />.---~--- <br />....- -- <br />/ <br />( --- <br />')1"-< <br />- . <br />,t:. .... .~_ <br />I? \ . '.. "'t <br />,(' J . · ~J \ <br />\. -lJ..IE J:-'/ ) <br />- J' \,--' <br />__t,_-- <br />f . . <br />67891011121314678 <br /> <br /> <br />~.~---- <br />,,"'" <br /> <br />___ --P'- <br />",... <br />---:""\~'-. <br />r\ \17 /' -\ ........ <br />1\ \ Ifll ri" <br />'~.Jilf{...~1 <br />1 '_./1,_.......- <br />. '\ I <br />0678910111213 <br />12 <br /> <br /> <br />I <br />I <br /> <br />t II <br />E 10 <br />oX: 9 <br />.,... <br />l- <br />X <br />C) <br />W <br />X <br />...J <br /><( <br />0 <br />i=. <br />0:: <br />.111 <br />> <br />12 <br />11 <br /> <br />I <br />I <br />I <br />I <br />I <br /> <br />I <br />I <br /> <br /> <br />-.... <br /> <br />~ "\ ........ <br />':-', ":0- <br />. . "- <br />\. I~. 1) '\ <br />--..... .. <br />'- -./'"'''' .,/ <br />-- <br />, <br />t <br />9 <br /> <br />-, <br /> <br />II 12 13 14 <br /> <br />~:;,:;~;;) <br />.. --- <br />PRECIPITATING <br />ICE <br /> <br />~ <br /> <br />DRY ICE FAL.LNi <br /> <br />Fig. 3. Two-dimensional simulation of dry ice seeding. Dry ice is represented by solid contours, <br />cloud ice and precipitating ice by different degrees of hatching. the cloud outline by the dotted line. <br />and streamlines by dashed lines. The seven panels show conditions at 0, J, 2, 3, 6. 9, J 2 minutes <br />after seeding. <br /> <br />I <br />I <br /> <br />strength, enhanced cloud growth and higher cloud tops. <br />However, most latent heat of fusion release is not due <br />to the direct freezing of cloud liquid caused by the <br />seeding agent, but rather by the freezing of cloud liquid <br />accreted by precipitating ice, some of which resulted <br />directly from the seeding. This indirect freezing effect <br />occurs somewhat later in the life of the cloud and tends <br />to be more diffuse than the heat release due to direct <br />freezing induced by the seeding agent. <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />Another indirect dynamic effect of seeding (which <br />occurs for hygroscopic seeding as well as ice-phase <br />seeding) is that produced by differences in hydrometeor <br />loading resulting from differences in the spatial and <br />temporal distribution of the various types of <br />hydro meteors. These various processes combine to <br />produce differences in fallout of precipitation and the <br />outflows which result from the precipitation-induced <br />downdraft impacting the surface, the resulting cold <br />pool, and subsequent effects on new cell growth or <br />enhancement of the parent updraft. The variety of <br /> <br />17 <br />