Climate Change & Carbon Cycle Notes PDF

Positive feedback = enhances and leads to a continuation of the Outcome Negative feedback =...

Positive feedback = enhances and leads to a continuation of the Outcome Negative feedback = reduces the outcome , leading to Stability and equilibrium being restored Water and Carbon importance ? All living need water to Survive. - organisms ↳ Drinking ↳ irrigation ↳ Power and energy CO2 in the atmosphere increases ↓ extra CO Causes Plants to increase growth ↓ Plants remove and store more CO2 from the atmosphere ↓ CO2 in the atmosphere reduces temperatures rise L Plants increasesgreenhor respire more a ↳ Amount of CO2 in ↑ atmosphere increases How related to climate ? are they change water Cycle feedback loop : · Ice reflects radiation from the Sun So less heat is absorbed by the surface. As the Melts heat absorbed by · ice , less is reflected and is instead the ocean. ↳ this warms the water and further melts the ice coverage. ↳ affects the between type and magnitude of water transfers land , ocean and atmosphere · Local and regional impacts could have profound effects on life on earth by Patterns ofPrecipitation the of freshwater. affecting and availability ↳ political and economic implications also considerable - > no sea ice = quicker trade routes , Carbon Cycle : Warmer temps have I opposite effects on the carbon Cycle A Higher temperatures have for plants increased the growing Season and this has increased the absorption of Carbon from the atmosphere * Higher temperatures have started to melt the Permafrost (Siberia). - Organic Matter trapped in Permafrost the acts as an important Carbon store ↳ more carbon stored in Permafrost than Currently in the atmosphere. - When the Permafrost Melts , Organic Matter decomposes and the bacteria Produces Carbon dioxide and methane as a waste Product ↳ these gasses bubble Up to the surface and enter the atmosphere. -Currently , the arctic acts as a net Carbon Store. ↳ if Permafrost continues to melt the arctic May become a net carbon source ↳ higher temps and melting Permafrost will become part of a highly destructive Positive feedback loop Water/carbon Cycle * Plankton use the Sun to Photosynthesise ↳ Primary Producers in the aquatic ecosystems Sustaining the food web - Phytoplankton releases DMS Promoting the formation of clouds (condensation ( ↳ temps Sun could result cloudiness. ↳ warmer less and more lead to in more global cooling sunshine might global cooling ↳ This Complex feedback loop is NEGATIVE FEEDBACK Climate Change - a lasting and Significant Change in the distribution Global Climate Change : 1 Systems driven by the Sun 2 Natural respond to But the Planet back into balance Systems. 30 Climate has changed and will continue to Change 4. Should be concerned with this exaggerated effect" on the natural Oscillations (Changes)