GEO 702 Lecture Notes - Lecture 13: Baby Beluga, Great Lakes Basin, Combined Oral Contraceptive Pill

• School: Ryerson University
• Department: Geography
• Course: GEO 702
• Professor: Larry Fullerton

Document Summary

Lecture 13 sources stress date: october 31st and november 7th. Need to look at the various aspects of stress and strain on ecosystems. Understand the stress then we can attempt to modify it: natural climatic change, natural climatic change. Normally considered to be extreme events i. e. abnormal amounts of water (rain, snow) normally over the course of years. Normally associate it with the ex. volcanoes, earthquakes, etc. Large, explosive volcanoes such as mount pinatubo in 1991. Are capable of lofting gases into the stratosphere (the layer of earth"s at(cid:373)osphere that sits a(cid:271)o(cid:448)e the troposphere(cid:895) Small volcanoes with warm rising air from monsoons give volcanic fumes a little boost and allow gases to reach the stratosphere where they last longer. Gases such as sulfur dioxide reach high in the atmosphere and spread, combining with water vapor and forming particles that reflect thus potentially resulting in a cooling effect. The material spewed out by pinatubo reduced global temperatures by about 0. 9 f.