Please enable JavaScript.
Coggle requires JavaScript to display documents.
10. Feedback between water and carbon cycles (Water and carbon cycles…
10. Feedback between water and carbon cycles
Feedback
Positive feedback
effects on natural systems that
accelerate and amplify
changes
system might start to
spin out of control
Arctic Permafrost Thawing
Negative feedback
system adjusts itself to
lesson or cancel out
the initial disruption.
maintains equilibrium but
putting the brakes on
opposite direction to initial change
Water and carbon cycles
methane feedback
methane is 50 times more toxic than CO2 and is being released as ice caps melt
occurring in high latitudes such as Russia and Canada
Cryosphere feedback
arctic ice melting
Terrestrial carbon feedback
vegetation and drainage problems
peatlands
rainforests
Marine carbon feedback
through inorganic processes (carbon pump) large amounts of CO2 absorbed by ocean
Destroying
plankton
, basic of the food chain and
supplies 60% of the worlds oxygen
Arctic Permafrost Thawing
example of positive feedback
System threshold
"A warming and changing earth's climate is unmistakable"
:silhouettes:
US National Oceanic and Atmospheric Administration
.
Earth's climate is
currently 0.8 degree warmer than it was 200 years ago
- scientists believe if we
increase by 2 degrees we will cross the global carbon cycle system threshold.
widespread and irreversible changes
local level -
desertification will lead to crossing the threshold for water cycle
as well as carbon cycle.