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© Yann Arthus-Bertrand / Altitude
Summary for Policymakers Qin Dahe
Thomas Stocker 259 Authors from 39 Countries
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Key SPM Messages
19 Headlines on less than 2 Pages
2
2009: WGI Outline Approved
14 Chapters Atlas of Regional Projections
54,677 Review Comments by 1089 Experts
2010: 259 Authors Selected
Summary for Policymakers ~14,000 Words
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Each of the last three decades has been successively warmer at the Earth’s surface than any preceding decade since 1850.
In the Northern Hemisphere, 1983–2012 was likely the warmest 30-year period of the last 1400 years (medium confidence).
(IPC
C 2
013,
Fig
. SP
M.1
a)
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Warming in the climate system is unequivocal
(IPC
C 2
013,
Fig
. SP
M.1
b)
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Human influence on the climate system is clear
(IPC
C 2
013,
Fig
. SP
M.6
)
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Global surface temperature change for the end of the 21st century is likely to exceed 1.5°C
relative to 1850 for all scenarios
(IPC
C 2
013,
Fig
. SP
M.7
a)
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Global mean sea level will continue to rise during the 21st century
(IPC
C 2
013,
Fig
. SP
M.9
)
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Limiting climate change will require substantial and sustained reductions of greenhouse gas emissions
(IPC
C 2
013,
Fig
. SP
M.1
0)
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© Yann Arthus-Bertrand / Altitude
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