GEG 4129 Lecture 2: GEG4129 Lecture 2
7 Feb 2018
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19/01/2018 forced variability is when you change the forces, solar variation, this causes the atmosphere to change: nonvariable is time scales, you can also get free variations or it can be something like the el ni o. It has to do with how the system is internally buried: changing the surface, changes the albedo, changes the bowen ratio, the temperature gradients, affects the winds. Changing the heating- impacts how the atmosphere is heated. Just changing the albedo changed the amount of solar radiation absorbed. The general circulation: low pressure in the summer high in the winter means convergence at the surface in the summer and divergence in the winter. Rain in the summer cold in the winter: there"s so much rain in the asian monsoon because of the enormous amount of convergence. As soon as the air masses come from the ocean they are forced to rise cause the convergence and the rain.
