1Lecture 34: March 31Climate Change•Review of Carbon Cycle- biological processes- humans: use of fossil fuels and land clearing• Rising Greenhouse Gases- what is greenhouse effect?- CO2& other greenhouse gases: H20, methane, N2O, etc.- impacts on global temperature- inferences from Earth’s past- impacts on climate, humans & ecosystems• Is carbon sequestration in forests a potential solution?Discussion Activity this weekArticle on carbon footprint, EPA website and carbon calculator(week 13 folder)Check Qwizdom Points on SAMS https://cats.lsa.umich.edu/Chapters 54: 1256-1262 & Beedlowet al.articleBecause components of the biosphere depend upon one another in complex ways, human actions that affect the biosphere can have unexpected side effects. Human impacts on biogeochemical cycles are among the most pressing issues of your generation. We are changing the world more rapidly than we are understandingit.• The ocean is by far the largest of the three reservoirs. • Carbon moves into and out of the atmospheric reservoir rapidly via the photosynthesis and respiration of organisms.• Human activities such as intensive agriculture, deforestation, and the burning of fossil fuels have changed the carbon cycle byadding large amounts of carbon dioxide to the atmosphere.
This preview has intentionally blurred sections.
Sign up to view the full version.