GEOL-1010 Lecture Notes - Lecture 10: Continental Crust, Solar Irradiance, Global Cooling
5 Feb 2018
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Document Summary
Geology in the news: another new piece of continental crust found, scientists are using updated mapping techniques that is helping them identify features that you can"t just see. Global warming: 2 separate questions to disentangle, 1. Is the earth warming up: have to address this one before the second one, 2. So is earth warming up: temperature calculations can get confusing, different places, statistical averages, etc, use a proxy instead, proxy= substitute, lots of things in nature respond to temperature change, example: glaciers. If it is getting warmer- glacier melts and gets smaller. If temperature stays the say- glacier stays the same size. If temp gets colder- the glacier gets thicker: 1980 vs 2002, glacier in 1980 filled the entire valley, in 2002 it had almost disappeared. Unusual warming pattern: the warming is occurring faster and has a greater magnitude than other warming trends we have data for in recent history. Greenhouse gases and global warming: remember ggs trap insolation.
