ENVS 2270 Lecture Notes - Lecture 1: Global Dimming, Chlorofluorocarbon, Tropopause
6 Dec 2017
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Unit 1: weather and climate: climate is what you expect; weather is what you get, weather describes what is currently happening (ex. Its 25 degrees outside: climate refers to long-term averages of weather (ex. Atmospheric circulation: atmosphere refers to the envelope of gases that surround the earth. Extends from the surface of earth to 145 km above the surface: atmosphere is compromised of several layers: Troposphere layer in which we live in: most weather occurs in this layer. Stratosphere ozone layer exists within the stratosphere: temperature increases in the stratosphere due to the absorption of solar radiation. Mesosphere where most meteors burn up. Thermosphere where satellites orbit: composition of the atmosphere: E(cid:395)uato(cid:396) (cid:373)o(cid:448)es at (cid:1005)(cid:1010)(cid:1004)(cid:1004) k(cid:373)/h, poles do(cid:374)"t (cid:396)otate. Earth rotates counter clockwise: circulation cells in the northern hemisphere. Hadley cell (0-30 degrees) convection cell in the tropics, thermally direct cell (air goes south to north) Ferrel cell: 30-60 degrees thermally indirect cell (warm air moves from north to south)
