2. IPCC 5. Assessment Report (2008-2014):
2 Coordinating Lead Authors
15 Lead Authors
4 Review Editors
1 Working Group Vice Chair
The substantial contribution of scientists
from The Russian Federation to IPCC AR5
is acknowledged
3. IPCC Synthesis Report
21 Headline Statements
printed on only 2 Pages
7579 printed pages
31 printed pages
3 Comprehensive Reports
2 Special Reports
IPCC Synthesis Report
Summary for Policymakers
4. Human influence on the
climate system is clear.
Continued GHG emissions will
cause further warming and
amplify existing risks.
Changes in climate have
caused impacts in natural
and human systems.
Multiple pathways exist to likely
limit warming to below 2°C.
5.
6. Warming of the climate system is unequivocal and,
since the 1950s, many of the observed changes
are unprecedented over decades to millennia.
IPCC2014,Fig.SYRSPM.1a,b
7. Human influence on the climate system is
clear, and recent anthropogenic emissions of
greenhouse gases are the highest in history.
IPCC2014,Fig.SYRSPM.1c,d
8. [GHG] effects, together with those of other anthropogenic
drivers, [...] are extremely likely to have been the dominant
cause of the observed warming since the mid-20th century.
IPCC2014,Fig.SYRSPM.3
0.0 0.5 1.0−0.5 (°C)
9. IPCC2013,Fig.SPM.7a,modified
Global mean surface temperature change from 1986-2005
Further warming will increase the likelihood of severe,
pervasive and irreversible impacts for people and ecosystems.
11. Risks are unevenly distributed and are generally
greater for disadvantaged people and communities
in countries at all levels of development.
IPCC2014,Fig.SYRSPM.9a
12. Global mean warming
All CO2 emissions since 1750
Any climate target implies
a limited carbon budget
13. Cumulative emissions of CO2 largely determine global mean
surface warming by the late 21st century and beyond.
IPCC2014,Fig.SYRSPM.10
14. Risks
today
Unique & threatened systems
Extreme weather events
Distribution of impacts
Global aggregate impacts
Large-scale singular events
1 5● ● ●
1
2
3
4
5
IPCC2014,Fig.SYRSPM.10
15. Risks
at 2°C
Unique & threatened systems
Extreme weather events
Distribution of impacts
Global aggregate impacts
Large-scale singular events
1 5● ● ●
1
2
3
4
5
IPCC2014,Fig.SYRSPM.10
18. Substantial emissions reductions over the next few
decades can reduce climate risks [...] and contribute to
climate-resilient pathways for sustainable development.
IPCC2014,Fig.SYRSPM.12
All IPCC Assessment Reports are available at www.ipcc.ch
Figure SYR SPM.9 | (a) Projected global redistribution of maximum catch potential of ~1000 exploited marine fish and invertebrate species. Projections compare the 10-year averages 2001–2010 and 2051–2060 using ocean conditions based on a single climate model under a moderate to high warming scenario, without analysis of potential impacts of overfishing or ocean acidification.
AR5: TCR = 1.0 to 2.5 °C (likely range; high confidence); extremely unlikely larger than 3°C
AR5: ECS = 1.5 to 4.5 °C (likely range; high confidence); extremely unlikely less than 1°C (high confidence); very unlikely greater than 6°C (medium confidence)
likely: -40 to -70% reductions by 2050
more likely than not: -25 to -55% reductions by 2050
likely: -40 to -70% reductions by 2050
more likely than not: -25 to -55% reductions by 2050
likely: -40 to -70% reductions by 2050
more likely than not: -25 to -55% reductions by 2050
