The IPCC released the Summary for Policymakers (SPM) of the report in November 2011. The full
report released today provides the basis for the key conclusions first presented in the SPM. It offers a
greater understanding of the human and economic costs of disasters and the physical and social
patterns that cause them. It enables policy-makers to delve into the detailed information behind the
findings to examine the material on which the IPCC based its assessments.
Teamwork across disciplines
The report is the outcome of cross-disciplinary teamwork between scientists studying the physical
aspects of climate change, scientists with expertise in impacts, adaptation and vulnerability as well as
experts in disaster risk management.
“The report integrates these three areas of expertise as an IPCC product which has high policyrelevance to countries and communities across the globe,” said R.K. Pachauri, Chairman of the IPCC.
“The authors assess scientific and technical information from around the world to provide and
communicate knowledge on what we know with confidence, as well as identifying areas on which
greater scientific evidence is essential to gain deeper understanding,” he said.
The environmental and social factors that influence the risk of disasters vary from region to region, but
many of the effective strategies for dealing with disaster risk in a changing climate are similar.
“The most effective measures tend to be those that aid sustainable development, provide a diverse
portfolio of options, and represent “low regrets” strategies in the sense that they yield benefits across
a wide range of climate futures,” said Field.
The SREX has assessed a wealth of new studies, and new global and regional modelling results that
were not available at the time of the Fourth Assessment Report in 2007, its last major assessment of
climate change science. Some important conclusions delivered by the SREX therefore include:
x Medium confidence in an observed increase in the length or number of warm spells or heat
waves in many regions of the globe.
x Likely increase in frequency of heavy precipitation events or increase in proportion of total
rainfall from heavy falls over many areas of the globe, in particular in the high latitudes and
tropical regions, and in winter in the northern mid-latitudes.
x Medium confidence in projected increase in duration and intensity of droughts in some regions
of the world, including southern Europe and the Mediterranean region, central Europe, central
North America, Central America and Mexico, northeast Brazil, and southern Africa.
“The SREX provides an unprecedented level of detail regarding observed and expected changes in
weather and climate extremes, based on a comprehensive assessment of over 1,000 scientific
publications,” said Qin Dahe, Co-Chair of Working Group I.
Regional differences
“The report also provides improved differentiation of observed and projected changes in extremes of
temperature, precipitation and drought across the continents of the globe,” said Thomas Stocker, the
other Co-Chair of Working Group I.
Some examples include:
x While there is high confidence that heatwaves have become more severe in southern Europe
and the Mediterranean, the scientists have reported less confidence in changes observed in
central and northern Europe.
x Similarly for projected changes in heavy precipitation in Africa, the scientists have assessed
with high confidence that heavy precipitation will increase in East Africa, but report low
confidence in projected changes in southern Africa and the Sahara.
x The assessment of projected changes in dryness across South America indicates medium
confidence that dryness will increase in northeast Brazil, while confidence is low in all other
regions of South America.
Increasing exposure of people and economic assets has been the major cause of long-term increases
in economic losses from climate-related disasters. Furthermore, the assessment indicates that in
many regions of the world, socio-economic factors will be among the main drivers of future increases
in related losses
Many countries, including developing countries, face severe challenges in coping with climate-related
disasters. For them the report is a rich source of knowledge.
“There are many options currently available that could improve preparation for effective response to
extreme climate events and disasters, and enhance recovery from them, said Vicente Barros, the
other Co-Chair of Working Group II. “This report identifies lessons learned from extensive experience
in disaster risk management and from the growing focus on climate change adaptation.”
SREX will now be presented in the coming weeks to stakeholders around the world. The report’s
authors will explain the report in events in developed and developing countries, to scientific experts, to
local-scale practitioners and other stakeholders as well as international organizations.
In April and May, the report will be presented to policy-makers in half a dozen locations in Latin
America, Asia and Africa, with the support of the Norwegian government and the Climate &
Development Knowledge Network.
Events are also planned with UN agencies in Geneva, the policy community in Brussels and the
insurance industry in London.
The report’s 592 pages cite thousands of scientific studies and have been subjected to three rounds
of review by experts and governments to ensure that the findings are firmly based in the underlying
scientific and technical information.
On publication the IPCC will also release earlier drafts of the report that were subject to formal review,
comments by expert and government reviewers on those drafts, and responses by the authors to the
comments. The IPCC will also publish some material used by the authors from sources other than
peer-reviewed journals.
A total of 220 authors from 62 countries worked on the report, for which 18,784 outside expert and
government review comments were received in the three rounds of formal review.
“The IPCC is deeply committed to producing reports that are policy-relevant but not policy prescriptive
through a transparent process,” Pachauri said.
Notes for editors
The report was originally proposed in 2008 by Norway and the UN International Strategy for Disaster
Reduction.
The IPCC was established in 1988 by the World Meteorological Organization (WMO) and the United
Nations Environment Programme (UNEP) to assess scientific information related to climate change,
to evaluate its environmental and socio-economic consequences and to formulate realistic response
strategies.
The IPCC has produced a series of Assessment Reports (in 1990, 1995, 2001 and 2007). The Fifth
Assessment Report will appear in four stages in 2013 and 2014. It has also produced several Special
Reports (of which Managing the Risks of Extreme Events and Disasters to Advance Climate Change
Adaptation (SREX) is the latest), Technical Papers, Methodologies and other key documents.
Together these have become the standard references for policymakers and scientists.
The IPCC assesses the most recent scientific, technical and socio-economic information produced
worldwide relevant to understanding climate change and its effects. It does not conduct any research
itself or monitor climate-related data. The work of the IPCC is carried out by thousands of scientists
on a voluntary basis.
In 2007 the IPCC was awarded the Nobel Peace Prize with U.S. Vice-President Al Gore.
The IPCC is currently organized in three Working Groups and the Task Force on National
Greenhouse Gas Inventories. Working Group I assesses the physical science basis of climate change
(what causes it and what will happen next); Working Group II deals with climate change impacts,
adaptations and vulnerability (what is climate change doing to the Earth and human society); and
Working Group III examines the mitigation of climate change (what can we do about it).
The Special Report on Managing the Risks of Extreme Events and Disasters to Advance Climate
Change Adaptation (SREX) was produced by Working Groups I and II. Working Group I’s Co-Chairs
are Qin Dahe of the China Meteorological Administration, Beijing, China, and Thomas Stocker of the
University of Bern, Switzerland. Working Group II’s Co-Chairs are Vicente Barros of the University of
Buenos Aires, Argentina, and Chris Field of the Carnegie Institution for Science, Stanford, USA
For further information please contact:
Jonathan Lynn, Head of Communications, IPCC, E-mail: jlynn@wmo.int , Tel: +41 22 730 8066.
