EOSC 114 Lecture Notes - Lecture 2: Torino Scale, Exponential Growth, Doubling Time
12 Sep 2016
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Hazard event/situation that could cause human or economic harm. Risk probability that hazardous event might occur (chance of potential loss) Logarithmic scale because many orders of magnitude and lots of energy. Use the power (to which 10 is raised) Metric prefixes: k = kilo = thousand = 1x103. T = tera = trillion = 1x1012 c = centi = hundredth = 1x10 2 m = milli = thousandth = 1x10 3. = micro = millionth = 1x10 6 n = nano = billionth = 1x10 9. Torino scale (earthquakes) (earthquakes) (volcanoes) (wind and waves) (hurricanes) (tornadoes) (impacts) Return period (rp) average number of years between disaster events of same magnitude (m) = rp(5) = 70 years/2 cases = 35 years. Time scales for energy to build up -> release: Gr = 1. 2%/year then dt = 70/1. 2 = 58. 3 years. Carrying capacity the population that can be sustainably supported within a given domain (earth) Overpopulation population that exceeds the carrying capacity.
