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"Figure SPM-2 - Reasons for Concern
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Risks per Degree of Climate Change
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Figure SPM-2: Reasons for
concern about projected climate change impacts.
The risks of adverse impacts from climate change increase
with the magnitude of climate change. The top part of the figure displays the
observed temperature increase relative to 1990 and the range of projected temperature
increase after 1990 as estimated by Working Group I of the IPCC for scenarios
from the Special Report on Emissions Scenarios.
The bottom panel displays conceptualizations of five reasons
for concern regarding climate change risks evolving through 2100. White indicates
neutral or small negative or positive impacts or risks, yellow indicates negative
impacts for some systems or low risks, and red means negative impacts or risks
that are more widespread and/or greater in magnitude.
The assessment of impacts or risks takes into account
only the magnitude of change and not the rate of change. Global mean annual
temperature change is used in the figure as a proxy for the magnitude of climate
change, but projected impacts will be a function of, among other factors, the
magnitude and rate of global and regional changes in mean climate, climate variability
and extreme climate phenomena, social and economic conditions, and adaptation."
Source
& © : IPCC
TAR SPM of WG II
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