Difficulties in Predicting GCC

• Difficulties i predicting GGC:

  • unreliable historic data
  • delay between cause and effect
  • incomplete understanding
  • different places experience different impacts of GGC
• Data collection:

  • historic data
  • proxy data
  • Ice core data
  • satellite data (Low Earth Orbit satellites)
  • aerial surveys with lasers
  • balloon
  • ROVs/AUVs
  • Argo floats
• Proxy data:

  • dendrochronology - the width of a tree ring shows the growth rate and may indicate the temperature and nutrient levels at the time - varies regionally
  • coral rings - some produce large coral heads with annual growth rings. Indicates past sea temperatures
  • pollen grains - preserved in lake sediments. Indicates the climate that was present. The date can be determined using radio-carbon dating