GEOG 1F91 Lecture Notes - Lecture 7: Enhanced Fujita Scale, Geostationary Operational Environmental Satellite, Humidity
18 Feb 2016
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Document Summary
For lab 5 take a look at nationalservice. com. Tornado- enhanced fujita scale (in the textbook) (2013 in can) 31 damage indicators. Humans can access less then 1% of all water. Earth has a fixed amount of water= global balance. Flows between land/ocean/atmosphere/ described as +/- flow. Positive balance precipitation > evaporation = (+40 000km cubed) Amount of water vapour in the air = humidity. Specific humidity- actual quantity of water vapour held by the air (g/kg-1) Water in the air related to temperature. Is the amount of water vapour present compared to maximum amount the air can hold at that temperature: exposed water/soil=increase humidity, change the air temperature, rh changes with temperature- warm air can hold more water. Adiabatic process- heating and cooling process that results due to changing pressure. Air forced to rise expands and temperature decreases. Rate of adiabatic cooling with altitude depends on the moisture content. Salr: saturated air cool at a rate of 6 degrees/1000m.
