Feedbacks
Low-latitude





in Climate Processes

warming


L
a
t
it
u
d
i
n
a
l

m
o
Positive feedback
i
s
t
u
r
e
Global

Negative feedback
t
r
a
n
coupling
s
p
o
r
t
Increased
High-latitude
scrub growth
warming
Increased
Less
evaporation
Earlier
sea ice
snow melt
Decreased
albedo
Terrestrial
Atmospheric
Marine
Decreased
coupling heating coupling
albedo
Increased
net radiation
Increased
More
net radiation
summer
clouds
Positive feedbacks intensify the original process.
Negative feedbacks lead to a compensating process. Source: Hugo Ahlenius/ GRID-Arendal, Global Outlook for Ice and Snow, 2008.
Present changes, causes and observed impacts 23
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