Presentation by Thomas Stocker during IPCC Outreach Event, Nairobi, Kenya (23 February 2015)

1. © Yann Arthus-Bertrand / Altitude
Thomas Stocker & Qin Dahe
Co-Chairs IPCC Working Group I
Switzerland and China
Science-Policy Interface Seminar:
Key Messages from WGI

3. 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.

4. Warming of the climate system
is unequivocal
IPCC2013,Fig.SPM.1b
Temperature Difference 1901 to 2012 based on trend (°C)

5. Warming of the climate system
is unequivocal
IPCC2013,Fig.SPM.2
Precipitation Difference 1951 to 2010 based on trend (mm/yr per decade)

6. Warming of the climate system
is unequivocal
IPCC2013,Fig.SPM.2
Precipitation Difference 1951 to 2010 based on trend (mm/yr per decade)

7. IPCC2013,Fig.SPM.7a
Global mean surface temperature change from 1986-2005
Continued emissions will cause further warming and
changes in all components of the climate system.

8. RCP 2.6 (annual) RCP 8.5 (annual)
IPCC 2013: Atlas of Global and Regional Climate Projections
Changes in East Africa (2081-2100)

9. 2016-2035
2046-2065
2081-2100

10. 2016-2035
2046-2065
2081-2100

11. IPCC2012,Fig.SPM.4A
A 1-in-20 year hottest day is likely to become a
1-in-2 year event by the end of the 21st century
 10 more frequent

12. 2°C world

13. 4.5°C world2°C world
Today we have a choice.

14. © Yann Arthus-Bertrand / Altitude
www.climatechange2013.org
www.ipcc.ch
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