ch[1].7&9 - Chapter 7 Cloud (165)- visible product...

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Chapter 7 Cloud (165)- visible product of condensation or deposition of water vapor within the atmosphere. Curvature effect (165)- effect a curved water surface has on the ability of water molecules to vaporize from the surface. Nuclei (165)- naturally occurring particles that promote condensation or deposition in the atmosphere. Cloud Condensation Nuclei (CCN) (166)- promotes condensation of water vapor at temperatures both above and below the freezing point of water. Ice-forming nuclei (IN) (166)- promote formation of ice crystals only at temperatures well below freezing. Hygroscopic nuclei (166)- special category of cloud condensation nuclei that have a special chemical affinity for water molecules, so that condensation may take place on these nuclei at relative humilities under 100% Supercooling (166)- cooling beyond its normal freezing point while remaining liquid. Cirriform cloud (167 )- wispy of fibrous Stratiform cloud (167)- layered Cumuliform cloud (167)- heaped or puffy Warm cloud (167)- the temperature in the cloud is above 0 Celsius Cold Cloud (167)- temperature is below 0 Celsius Cirrus (Ci) clouds (168)- nearly transparent and occur as delicate silky strands, called mares’ tails. Cirrostratus (Cs) clouds (168 )- nearly transparent. They form a thin, white veil or sheet that partially or totally covers the sky. Cirrocumulus (Cc) clouds (168)- consist of small, white, rounded patches arranged in a wavelike or mackerel pattern. Altostratus (As) clouds (169)- occur as uniformly gray of bluish white layers that totally of partially cover the sky. Altocumulus (Ac) clouds (169)- consist of roll-like patches or puffs that often form waves or parallel bands.
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Stratocumulus (Sc) clouds (170 )- consist of large irregular puffs or rolls separated by areas of clear sky. Stratus (St) clouds (170)- appear as a uniform gray layer stretching from horizon to horizon. Fog occurs where stratus meets the ground, when fog lifts the stratus cloud deck may break up into stratocumulus. Nimbostratus (Ns) clouds (170)- resemble stratus except is darker gray and has less uniform, more ragged base. Light to moderate precipitation and continuous for 12 hours or longer. Convective condensation level (CCL) (170 )- altitude at which condensation begins to occur through convection. Cumulus (Cu) clouds (170)- small puffy clouds that resemble balls of cotton floating in the sky on a fair weather day. Cumulus congestus cloud (171) - upward-building connective clouds with vertical development between those of cumulus and cumulonimbus. Cumulonimbus (Cb) cloud (171)- tops reach altitudes of 20,000 m. upper portion consists of ice crystals, middle portion may be supercooled water droplets or a mixture of supercooled water droplets and ice crystals, lower portion consists of ordinary water droplets. Wind shear (172)-
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This note was uploaded on 09/12/2008 for the course GEOS 220 taught by Professor Mountain during the Spring '08 term at University of Louisville.

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ch[1].7&9 - Chapter 7 Cloud (165)- visible product...

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