Geography Topic 2 - Climate Change

  • Created by: Riya.b123
  • Created on: 21-02-19 10:32
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  • CLIMATE CHANGE
    • Causes of Climate Change
      • Milankovitch cycle - Affects how far Earth is from sun - changes amount of solar radiation Earth receives
      • Sunspots - When few - solar output is reduced
      • Volcanic Activity - volcanic eruptions transmit large quantities of material into atmosphere
      • Natural Greenhouse Effect - gases in atmosphere trap outgoing heat to keep Earth at right temperature
      • Human Activities
        • Farming - Livestock & rice produce emit alot of methane
        • Deforestation - Plants stop taking in CO2
    • Evidence For Climate Change
      • Since last glacial period ended - climate has been warming
      • Ice Cores - Scientists drill into ice sheets & analyse gases trapped to tell what the temperature was - reliable & detailed
      • Sea Ice Positions - Form around poles in winter & melt during summer - scientists observe - reliable
      • Diaries & Paintings - Show what climate was like in the past - not very reliable
    • Global Effects of Climate Change
      • Environmental - Temperatures expected to rise - Glaciers & sea ice to  shrink - distribution of biodiversity could decrease - habitats destroyed
      • Economic - farming affected - water shortages affect ability to generate power - money spent of predicting extreme events
      • Social - threat from wildfires - Malnutrition - water struggle - places could be impossible to inhabit
    • Effect On The UK
      • Temperature & rainfall increase - droughts & flooding more frequent - sea level rise
      • Increased tourism - productivity of crops - fishing industry at risk
      • Deaths from illnesses - water availability - flooding can damage homes & businesses

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