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SIQ Readings: Sociology and the Environment.docx

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Sandra Colavecchia

Society in Question (SIQ) Notes: Sociology 1A06 – Prof Colavecchia McMaster University 2012/2013 Sociology & the Environment: “Climate Changes in Climate and their Effects” - Chapter 26 SIQ  Synthesis report = assessment carried out by the 3 Working Groups of the Intergovernmental Panel on Climate Change (IPCC). Provides view of climate change.  11/12 years from 1995-2006 rank among the 12 warmest years in the instrumental record of global surface temperature since 1850.  Temperature increase is greater at higher Northern latitudes.  Land regions warmed faster than oceans.  Rising sea level. 1961=1.8 mm/yr 1993=3.1 mm/yr. from melting glaciers and ice caps and polar ice sheets.  Decreases in snow and ice extent consistent are also with warming. Shrunk by 2.7% per decade. Mountain glaciers and snow cover have declined in both hemispheres.  1900-2005=precipitation increased in Eastern parts of North & South America, and Asia and declined in the Sahel, Mediterranean, Southern Africa, and parts of southern Asia. Globally, the area affected by drought has likely increased since the 1970s.  Over past 50 years, coldness has become less frequent and hotness more frequent.  Heat waves, heavy precipitation and rising sea levels increasing since 1975.  Greenhouse gases (GHSs) and aerosols, land cover and solar radiation alter the energy balance of the climate system. Carbon Dioxide = human caused (agriculture and fossil fuel use). Grew by 80% between 1970-2004.  Observed patterns of warming and their changes are stimulated only by models that include anthropogenic forcings.  Human infthences have very likely contributed to sea level rise during the latter half of the 20 century, likely
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