Lecture 23-Global Warming

Lecture 23-Global Warming - Global Climate Change Elements...

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Unformatted text preview: Global Climate Change Elements of Ecology: Chapter 29 https://s3.amazonaws.com/cs- vancouversun/CommunityServe r.Components.PostAttachments/ 00/00/34/80/35/globalwarming.j pg? AWSAccessKeyId=0TTXDM8 6AJ1CB68A7P02&Expires=12 49002313&Signature=DAoRp %2fG6OTfnwYY8tGYCfh8Sn5 g%3d Greenhouse Effect Some gasses trap heat better than others: CO 2 = carbon dioxide CH 4 = methane CFCs = chlorfluorocarbons O 3 = ozone NO x = nitrogen oxides H 2 O = Water vapor Global Warming Humans are putting huge amounts of CO 2 and other greenhouse gasses into the atmosphere Measurable global climate change has coincided with this increase in greenhouse gasses Historically warm periods have also been periods with high CO 2 levels Global Climate Change Warming effects Earths natural cycles Can cause global weather disruptions Can speed up decomposition and CO 2 and N turnover Can affect species and cause extinctions Hydrologic Cycle Carbon Cycle Temperature Affects the Carbon Cycle Atmospheric CO 2 causes greenhouse effect More CO 2 > warmer temperatures Soil stores 2-3x more carbon than atmosphere Soil could add a lot of CO 2 to the atmosphere due to carbon cycle Warmer temperatures lead to faster carbon cycling (shorter turnover) Shorter turnover = may increase rate of CO 2 released from soil into atmosphere Ocean Currents affect Climate Water can hold a lot of heat Water temperatures fluctuate less than land (air) temperatures Ocean currents can warm or cool the surrounding air Ocean Currents affect Climate Warm the oceans and global weather patterns can be disrupted Warm the oceans and the amount of carbon held in them changes Warm the oceans and sensitive creatures cant survive Major Ocean Currents Global Climate Change Change weather patterns and get: Shift in rainfall patterns Disruption of migration events Change in phenology (when events occur) Shift in species found in a given area http://www.nytimes.com/2007/05/03/science/03flowers.html Pikas...
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This note was uploaded on 10/07/2011 for the course BIOS 230 taught by Professor Gibbons during the Spring '08 term at Ill. Chicago.

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Lecture 23-Global Warming - Global Climate Change Elements...

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