EESA09H3 Lecture Notes - Lecture 11: Ice Shelf, Wind Chill, Thermodynamics
24 Jul 2018
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Eesa09 lecture 11: changing wind with climate change. Climate = what is it usually like outside: description of typical weather conditions for a location + time of year, based on statistics accumulated over a long period of time (at least 30 years) Toronto(cid:859)s climate for july: factors that influence local climate. Global circulation prevailing winds, jet streams, ocean currents. Air masses transport of warm/cold, moist/dry air. Geography e. g. rainshadows from mountains, land/sea breezes. A change in (cid:858)a(cid:859) will cause a change in (cid:858)b(cid:859) which in turn will cause a change in (cid:858)a(cid:859) in the same direction is called a positive feedback. However, if a change in (cid:858)a(cid:859) causes a change in (cid:858)b(cid:859) and that will cause in (cid:858)a(cid:859) in the opposite direction then it is a negative feedback: historical climate change. General circulation models (gcms) similar to meteorological models, don(cid:859)t predict year-to-year variability; they predict changes in lt averages. Dust + sulphuric acid particles launched into the stratosphere.
