Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report: Working Group III
The United States Global Change Research Program,
in cooperation with the Department of State, request expert review of
the Second Order Draft of the Working Group III Contribution to the
Fifth Assessment Report of the Intergovernmental Panel on Climate Change
(IPCC) Climate Change 2013: The Physical Science Basis.
To be notified when the Second Order Draft of the Working Group III contribution to the Intergovernmental Panel on Climate Change's 5th Assessment report is available for review, please click here
On behalf of the U.S. Department of State, the U.S. Global Change Research Program is coordinating the submission of comments by U.S. experts to inform
development of an integrated set of U.S. Government comments on the
report. Expert comments must be received via the internet-based application by
Midnight, Eastern Daylight Time, 27 March 2013 to be considered for inclusion in the U.S. Government
submission. An expert reviewer may also be asked to participate in the
government review organized within his or her own country. In such a
case, he/she should submit comments either as an individual or as part
of the government review, but not both.
Because the report is still in draft form, distribution
of the materials for review will be through a password-protected website.
The chapters of the draft have undergone extensive revision based on
comments received from many experts in the first round of review. IPCC
practice is that drafts of IPCC reports are not published until they
are final. In making the document available for review by U.S. experts,
we are requiring reviewers to indicate that they understand and will
respect this practice.
To receive a copy of the draft report for review,
you will be asked to register with your first name, last name, institutional
affiliation and email address. You will also be asked to accept a user
agreement before submitting your request.
Background on the IPCC
The IPCC was established as an intergovernmental
body under the auspices of the United Nations Environment Programme
(UNEP) and the World Meteorological Organization
(WMO)in 1988. In accordance with its mandate and as
reaffirmed in various decisions by the Panel, the major activity of
the IPCC is to prepare comprehensive and up-to-date assessments of policy-relevant
scientific, technical, and socio-economic information for understanding
the scientific basis of climate change, potential impacts, and options
for mitigation and adaptation. The IPCC develops a comprehensive assessment
spanning all the above topics approximately every six years. The First
Assessment Report was completed in 1990, the Second Assessment Report
in 1995, the Third Assessment Report in 2001, and the Fourth Assessment
in 2007. Three working group volumes and a synthesis report comprise
the Firth Assessment Report.Working Group I assesses the scientific aspects of the climate system and climate
change;Working Group II assesses the vulnerability of socio-economic and natural systems
to climate change, potential negative and positive consequences, and
options for adapting to it; andWorking Group III assesses options for limiting greenhouse gas emissions and otherwise
mitigating climate change. Principles and procedures for the IPCC and
its preparation of reports can be found at the following Web sites:
Background on the Report
In October 2009, the IPCC approved the outline for the Working Group III contribution to the
5th Assessment Report. Authors were nominated in January of 2010 and selected
in June of 2010. All IPCC reports go through two broad reviews: a ``first-order
draft'' for experts, and a ``second-order draft'' for experts and governments.
The Second Order Draft of the Working Group III contribution to the
5th Assessment Report will be available for review beginning on 25 February
Experts from the United States may choose one
of two different methods to provide their comments on the Second Order
Draft of the Working Group III contribution to the 5th Assessment Report.
They may provide their comments directly to the IPCC or they may provide
them through the U.S. Government and Expert Review coordinated by the
United States Global Change Research Program. Beginning on 25 January,
experts may register to review the draft report at either: http://www.ipcc-wg3.de/ or globalchange.gov/ar5wgiii. Whatever method an expert has chosen, the draft
report will be made available to them on 25 February 2013. Comments
are due to the IPCC Working Group I secretariat by 22 April 2013. In
order to accommodate the review process, comments to the U.S. Government
review, comments through the United States Global Change Research Program
are due by midnight 27 March 2013.
As part of the U.S. Government
Review of the Second Order Draft of the Working Group III Contribution
to the 5th Assessment Report, the U.S. Government is soliciting comments
from experts in relevant fields of expertise. The United States Global
Change Research Program will coordinate collection of U.S. expert comments
and the review of the report by panels of Federal scientists and program
managers in order to develop a consolidated U.S. Government submission.
Expert comments received within the comment period will be considered
for inclusion in the U.S. Government submission. Instructions for review
and submission of comments are available at: globalchange.gov/ar5wgiii. To be considered for inclusion in the U.S.
Government collation, comments must be received by midnight 27 March
2013. Comments submitted for consideration as part of the U.S. Government
Review should be reserved for that purpose, and not also sent to the
IPCC Secretariat as a discrete set of expert comments.