ENVIRSC 1C03 Lecture Notes - Lecture 7: Permafrost, Northern Hemisphere, Sea Ice
1 Mar 2017
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Document Summary
Sulfur dioxide with water = sulfuric acid (when volcano erupts) Mount pinatubo, 1991- key event on impacts on the eruptions on the climate. Impact of recent eruptions- increasing trend: drop in global temperature: 0. 2-0. 3 oc, sulfur droplets- which increase the albedo of the atmosphere. Correlates with the concentrations with greenhouse gases in the atmosphere. Change in climate resulting from human activities at local to global scale entirely man made changes. Burning of fossil fuels are the main factor. Faster rate of change in temperature than over past 10, 000 years. Observed values and climate models show greatest temperature rise at high latitudes. Bangladesh- surrounded by water, may increase in floods: part of the country will be covered by water. Projections of sea-level rise- rise in sea level 0. 4-0. 5 change. Hemisphere particularly in spring and summer: spring decline- 7. 5% since 1922, overall 1. 3% per decade. Sea ice is declining reducing the albedo of the highest latitudes.
