ATMS 100 Lecture 11: ATMS 4-18
11 May 2016
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As air rises it reaches lower pressure and expands. Temp drops but moister content remain the same so rh increases. Parcel eventually saturated condensation occurs and a cloud forms. The faster air rises the more interesting the weather will be. Non precipitating layered cloud or drizzle ( stratus cloud) 1cm/s or less. Air stable doesn"t wanna rise by some means. To forecast thunderstorm development we just assess if the atmosphere will support buoyant ascent. Rate of decrease of environmental temp with height. Elr says nothing about how temp of a rising or sinking air parcel changes. To not add energy to rising air. The rate at which a rising unsaturated air parcel cools. Sinking unsaturated air also warms at this rate. Rising saturated air also cools but at a different rate called the moist adiabatic lapse rate. Sinking saturated air also warms at this rate. When rising parcel temp (black) is to right of temp.
