Impacts associ-
ated with global
o o o
temperature
+1
°
2
3 4
+
5
o
+ + +
change Global mean annual temperature change relative to 1980 - 1999
WATER
Increased water availability in moist tropics and high altitudes
Decreased water availability and increase in droughts in mid-altitudes and semi-arid low latitudes

People affected:
Additional people
0.4 to 1.7 billion 1.0 to 2.0 billion 1.1 to 3.2 billion
with increased
water stress
ECO-
Increased amphibian About 20 to 30% of species at increasingly Major extinctions around the globe
extinction high risk of extinction
SYSTEMS
Increased coral bleaching Most corals bleached Widespread coral mortality
Increasing species range shifts and wildfire risk Terrestrial biosphere tends toward a net carbon source
~15% of ecosystems affected ~40% of ecosystems affected
FOOD
Low latitutes:
Crop productivity decreases
for some cereals All cereals decrease
Mid to high latitudes:
Crop productivity increases
for some cereals Decreases in some regions
COASTS Increased damage from floods and storms
About 30% loss of coastal wetlands
Additional people at risk
of coastal flooding each year: 0 to 3 million 2 to 15 million
HEALTH
Increased burden from malnutrition, diarrhoeal, cardio-respiratory and infectious diseases

Increased morbidity and mortality from heatwaves, floods and droughts
Changed distribution of some disease vectors Substantial burden on health services
SINGULAR
Local retreat of

Long term commitment Leading to reconfiguration
ice in Greenland to several metres of sea-level of coastlines worldwide and
EVENTS
and West Antarctic rise due to ice sheet loss inundation of low-lying areas
Ecosystem changes due to weakening of the meridional
overturning circulation
Impacts will vary by extent of adaptation, rate of temperature change and socio-economic pathway
28 Planet in Peril
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