Feedback Mechanisms

Feedback Mechanisms

1. Positive

   • A situation where an initial change causes an increase in the original change
   • Raised temps
     • increased rate of decamp so more CO2
     • Melts snow and ice therefore albedo is decreased
     • More CH4 released
     • Forest areas drier. More fires that last longer

2. Negative

   • A situation where an initial change causes a reaction that decreases the original change.
   • Higher temps means more photosynthesis which would lower CO2 levels
   • Warming increases evap which creates more low level cloud

3. An environmental factor may cause other features to change. Positive or negative impact.