GEOG 205 Lecture Notes - Lecture 6: Subduction, Oxygen-18, Palynology
9 Feb 2016
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Geog 205 - 22 jan fri: greenhouse effect. Gases in atmosphere that absorb and emit longwave radiation. Some gases absorb and emit radiation better than others (not necessarily plentiful in terms of % of atmosphere - but great relative impact!!) Earth warmer than would be without these gases. Without these gases, earth"s surface would average about. Gh gas concentrations in atmosphere naturally rising and falling: present-day global climate. Climate is usually communicated as summary of characteristics. Variability important (diurnal, seasonal, annual, decadal etc. ) One of most pressing concerns for humans on earth today is climate change, and what will happen in the future. Have such climate changes happened before in history of. This information is used to examine the role that *forces causing past climate changes* have in *modern climate changes*, and to help make predictions about what will happen in future. Utilizes chemistry, physics, geology, atmospheric, ocean sciences history, anthropology, archaeology,
