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
- Causes of Climate Change
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