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<br />PRECIPITATION EFFICIENCY <br /> <br />Nearly all of the water vapor that is conver~ed to rain <br />in clouds comes out of the air from the surface. Clouds <br />send a considerable amount of water into upper levels of <br />the atmosphere. <br /> <br /> 50 <br /> WASTED <br /> f-4 WATER <br />,:::a~ <br />Z~ <br />::::nz.. <br />0 <br />~tf.) <br />l:).. <br /> 0 <br />~o <br />>0 <br />0.... <br />j:Q <br />c(z <br /> ~ <br />f-4 <br />:X:~ <br />l:)~ <br />~> <br />~~ <br />:X:~ <br /> 5 <br /> Cloud air <br /> inflow <br /> <br /> <br />A measure of the proportion of available water vapor <br />actually converted to rainwater is termed "precipita- <br />t~on efficiency" and is normally only 40t. <br /> <br />38 <br />