This consensus document was prepared under the auspices of the Climate Change Research Centre at the University of New South Wales in Sydney, Australia.
The 2007 IPCC report, compiled by several hundred climate scientists, has unequivocally concluded that our climate is warming rapidly, and that we are now at least 90% certain that this is mostly due to human activities. The amount of carbon dioxide in our atmosphere now far exceeds the natural range of the past 650,000 years, and it is rising very quickly due to human activity. If this trend is not halted soon, many millions of people will be at risk from extreme events such as heat waves, drought, floods and storms, our coasts and cities will be threatened by rising sea levels, and many ecosystems, plants and animal species will be in serious danger of extinction.
The next round of focused negotiations for a new global climate treaty (within the 1992 UNFCCC process) needs to begin in December 2007 and be completed by 2009. The prime goal of this new regime must be to limit global warming to no more than 2ºC above the pre-industrial temperature, a limit that has already been formally adopted by the European Union and a number of other countries.
Based on current scientific understanding, this requires that global greenhouse gas emissions need to be reduced by at least 50% below their 1990 levels by the year 2050. In the long run, greenhouse gas concentrations need to be stabilised at a level well below 450 ppm (parts per million; measured in CO2-equivalent concentration). In order to stay below 2ºC, global emissions must peak and decline in the next 10 to 15 years, so there is no time to lose.
As scientists, we urge the negotiators to reach an agreement that takes these targets as a minimum requirement for a fair and effective global climate agreement.
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The 2007 Bali Climate Declaration has been signed by the following scientists:
Name |
Title |
Country |
Richard Allan |
Dr |
United Kingdom |
Richard Anthes |
Dr |
USA |
Waleed Abdalati |
Head, Cryospheric Sciences Branch |
USA |
Becky Alexander |
Assistant Professor |
USA |
Ian Allison |
Dr |
Australia |
Caspar Ammann |
Research Scientist |
USA |
Leif Anderson |
Professor |
Sweden |
Jean-Claude Andre |
Dr |
France |
Natalie Andronova |
Research Scientist |
USA |
David Archer |
Professor University of Chicago |
USA |
Mike Archer |
Professor. Dean of Science |
Australia |
Vincenzo Artale |
Senior Research Scientist |
Italy |
Paulo Artaxo |
Professor |
Brazil |
Karen Assmann |
Dr |
Norway |
Dorothee Bakker |
Dr |
United Kingdom |
Edouard Bard |
Professor College de France |
France |
Tim Barnett |
Research Marine Physicist |
USA |
J. Ray Bates |
Professor |
Ireland |
Richard Bellerby |
Dr |
Norway |
Rasmus E. Benestad |
Dr |
Norway |
Terje Berntsen |
Senior Scientist |
Norway |
Nathan Bindoff |
Professor Physical Oceanography |
Australia |
Robert Bindschadler |
Chief Scientist, Hydrospheric/Biospheric Laboratory |
USA |
Roxana Bojariu |
Head, Climate Research Group |
Romania |
Sandrine Bony |
Research Scientist |
France |
Laurent Bopp |
Dr |
France |
Alberto Borges |
Dr |
Belgium |
Philippe Bousquet |
Assistant Professor |
France |
Pascale Braconnot |
Dr |
France |
Raymond S. Bradley |
Professor. Director. Climate System Research Center |
USA |
Guy Brasseur |
Senior Scientist |
USA |
Francois-Marie Breon |
Professor |
France |
Christopher Bretherton |
Director. Program on Climate Change |
USA |
Victor Brovkin |
Dr |
Germany |
Erik Buitenhuis |
Dr |
United Kingdom |
Pep Canadell |
Executive Director Global Carbon Project |
Australia |
Mark Cane |
Professor |
USA |
Carlo Carraro |
Professor |
Italy |
Anny Cazenave |
Senior Scientist |
France |
Marie-Lise Chanin |
Director of Research Emeritus |
France |
Sylvie Charbit |
Dr |
France |
Robert J. Charlson |
Professor |
USA |
John Church |
Chief Research Scientist |
Australia |
Garry Clarke |
Emeritus Professor of Geophysics |
Canada |
Martin Claussen |
Professor. Director. Max Planck Inst. |
Germany |
William D. Collins |
Professor and Senior Scientist |
USA |
Paul Crutzen |
Professor |
Germany/USA |
Kurt M. Cuffey |
Professor |
USA |
Valerie Daux |
Dr |
France |
Anthony Del Genio |
Physical Scientist |
USA |
Kenneth Denman |
Senior Scientist |
Canada |
Robert E. Dickinson |
Professor |
USA |
Paul Dirmeyer |
Research Scientist |
USA |
Helge Drange |
Professor |
Norway |
Kerry Emanuel |
Professor |
USA |
Matthew England |
Professor and ARC Federation Fellow |
Australia |
Ian Enting |
Professor |
Australia |
Jean-Louis Fellous |
Earth observation satellite expert |
France |
Jonathan Fink |
Director. Global Institute of Sustainability |
USA |
Andreas Fischlin |
Director Terrestrial Systems Ecology. ETH Zurich |
Switzerland |
Jacqueline Flückiger |
Research Scientist |
Switzerland |
Chris E. Forest |
Research Scientist |
USA |
Piers Forster |
Reader in Climate Change Physics |
UK |
Joos Fortunat |
Professor |
Switzerland |
Roger Francey |
Senior Scientist |
Australia |
Helen Amanda Fricker |
Associate Research Geophysicist |
USA |
Pierre Friedlingstein |
Dr |
France |
Andrew D. Friend |
Dr |
United Kingdom |
Qiang Fu |
Professor |
USA |
Andrey Ganopolski |
Scientist |
Germany |
Catherine Gautier |
Professor |
USA |
Alexander Gershunov |
Research Climatologist |
USA |
Sarah Gille |
Associate Professor |
USA |
Nathan Gillet |
Dr |
UK |
Valerie Gros |
Dr |
France |
Nicolas Gruber |
Professor |
Switzerland |
Hoshin Gupta |
Professor |
USA |
Kimio Hanawa |
Professor |
Japan |
Bogi Hansen |
Professor |
Faroe Islands |
Mohamed H.A. Hassan |
Professor |
Italy |
Klaus Hasselmann |
Prof. Emeritus |
Germany |
Gerald Haug |
Professor |
Switzerland |
Didier Hauglustaine |
Directeur de Recherche CNRS |
France |
A. D. J. Haymet |
Professor |
USA |
Gabriele Hegerl |
Dr and Reader Geosciences |
UK,USA |
Martin Heimann |
Professor. Director. Max-Planck-Inst. |
Germany |
Christoph Heinze |
Professor in Chemical Oceanography |
Norway |
Ann Henderson-Sellers |
Professor |
Australia |
Jens Hesselbjerg Christensen |
Head of Climate Research Programme |
Denmark |
Bruce Hewitson |
Professor |
South Africa |
Kip Hodges |
Director. School of Earth & Space Exploration |
United States |
Georg Hoffman |
Dr |
France |
Marika Holland |
Scientist |
USA |
David M Holland |
Professor |
USA |
Elisabeth A. Holland |
Senior Scientist, National Centre for Atmospheric Research |
USA |
Greg Holland |
Senior Scientist Severe Weather Research and Applications |
USA |
Lesley Hughes |
Professor |
Australia |
James W. Hurrell |
Senior Scientist |
USA |
Stan Jacobs |
Senior Research Scientist |
USA |
Eystein Jansen |
Professor. Director |
Norway |
Truls Johannessen |
Professor of Chemical Oceanography |
Norway |
Ian Joughin |
Senior Engineer |
USA |
Masa Kageyama |
Dr |
France |
Robert Kandel |
Emeritus Senior Scientist |
France |
Georg Kaser |
Professor |
Austria |
Ralph Keeling |
Professor of Geochemistry |
USA |
Robert M. Key |
Research Oceanographer |
United States |
Jeffrey Kiehl |
Senior Scientist |
USA |
Miko Kirschbaum |
Senior Scientist |
New Zealand |
Christine Klaas |
Dr |
Germany |
Albert Klein Tank |
Dr |
Netherlands |
Reto Knutti |
Professor |
Switzerland |
Rupa Kumar Kolli |
Dr |
India |
René Laprise |
Professor. Director ESCER Centre |
Canada |
Corinne Le Quere |
Professor |
United Kingdom |
Herve Le Treut |
Director. Laboratoire de Meteorologie Dynamique |
France |
Peter Lemke |
Professor |
Germany |
Conway Leovy |
Professor Emeritus |
USA |
Sydney Levitus |
Director. World Data Center for Oceanography |
USA |
Ulrike Lohmann |
Professor |
Switzerland |
Diana Liverman |
Professor |
United Kingdom |
Dan Lubin |
Research Physicist |
USA |
Joachim Luther |
Professor |
Germany |
Amanda H. Lynch |
Professor and ARC Federation Fellow |
Australia |
Jose Antonio Marengo |
Senior Scientist |
Brazil |
Jochem Marotzke |
Professor. Director. Max Planck Inst. |
Germany |
Valerie Masson-Delmotte |
Dr |
France |
Ben Matthews |
Dr |
Belgium |
Cecilie Mauritzen |
Senior Scientist |
Norway |
Bryant McAvaney |
Senior Principal Research Scientist |
Australia |
James J. McCarthy |
Professor of Oceanography |
USA |
Jeffrey J. McDonnell |
Professor and Richardson Chair in Watershed Science |
USA |
Trevor J. McDougall |
Dr |
Australia |
Tony McMichael |
Professor |
Australia |
Ben McNeil |
Queen Elizabeth II Research Fellow |
Australia |
Nicolas Metzl |
Dr |
France |
Elisabeth Michel |
Dr |
France |
Guy Midgley |
Dr |
South Africa |
Arthur J. Miller |
Research Oceanographer |
USA |
Gunnar Myhre |
Senior Scientist |
Norway |
Neville Nicholls |
Professor |
Australia |
Richard D. Norris |
Professor and Curator, SIO Geological Collections |
USA |
Daniel Olago |
Dr. Senior Lecturer University of Nairobi |
Kenya |
Michael Oppenheimer |
Professor |
USA |
Bette Otto-Bliesner |
Senior Scientist |
USA |
Jonathon Overpeck |
Director Institute for the Study of Planet Earth |
USA |
Didier Paillard |
Dr |
France |
Wm. Richard Peltier |
University Professor of Physics |
Canada |
Andy Pitman |
Professor |
Australia |
Serge Planton |
Senior Scientist |
France |
Gian-Kasper Plattner |
Dr |
Switzerland |
Jan Polcher |
Directeur de Recherche du CNRS |
France |
Michael J. Prather |
Fred Kavli Professor |
USA |
Stefan Rahmstorf |
Professor of Physics of the Oceans |
Germany |
Philip Rasch |
Senior Scientist |
USA |
Michael Raupach |
Dr |
Australia |
Chris Reason |
Professor. Oceanography |
South Africa |
James Renwick |
Science Leader, Climate Variability & Change |
New Zealand |
Ulf Riebesell |
Professor |
Germany |
Stephen R. Rintoul |
Dr |
Australia |
Johan Rockström |
Associate Professor |
Sweden |
Terry L. Root |
University Faculty, Senior Fellow |
USA |
Lynn M. Russell |
Professor of Atmospheric Chemistry |
USA |
Toshiro Saino |
Professor |
Japan |
Christoph Schär |
Professor in Atmospheric Sciences, ETH Zurich |
Switzerland |
John Schellnhuber |
Professor |
Germany |
Gavin Schmidt |
Research Scientist, NASA GISS |
USA |
Stephen H. Schneider |
Professor |
USA |
Birgit Schneider |
Dr |
France |
Michael Schulz |
Senior Scientist |
France |
Richard Seager |
Senior Research Scientist |
USA |
Jeffrey P. Severinghaus |
Professor of Geosciences |
USA |
Drew Shindell |
Senior Scientist and Lecturer |
USA |
W James Shuttleworth |
Professor. Director NSF SAHRA Center |
USA |
Murugesu Sivapalan |
Professor |
USA |
John P. Smol |
Professor |
Canada |
Olga Solomina |
Dr |
Russia |
Richard Somerville |
Professor |
USA |
Will Steffen |
Professor |
Australia |
Thomas Stocker |
Professor |
Switzerland |
Kristof Sturm |
Associate Professor |
Sweden |
John Sulston |
Dr |
United Kingdom |
Didier Swingedouw |
Dr |
France |
Lynne D. Talley |
Professor |
USA |
Karl E. Taylor |
Dr |
USA |
Fichefet Thierry |
Professor |
Belgium |
Helmuth Thomas |
Associate Professor. Canada Reseach Chair |
Canada |
Jerry Tjiputra |
Dr |
Indonesia |
Kevin Trenberth |
Dr. Head, Climate Analysis Section |
USA |
Peter A. Troch |
Professor |
USA |
Carol Turley |
Dr |
United Kingdom |
A.S Unnikrishnan |
Senior Scientist |
India |
Francisco P. J. Valero |
Director Atmospheric Research Laboratory |
USA |
Rob Van Dorland |
Dr |
The Netherlands |
Ricardo Villalba |
Director IANIGLA |
Argentina |
Martin Visbeck |
Professor |
Germany |
Andrea Volbers |
Dr |
Norway |
Thorsten Wagener |
Assistant Professor |
USA |
John Wahr |
Professor |
USA |
Warren M. Washington |
Senior Scientist |
USA |
Bob Wasson |
Professor |
Australia |
Andrew Watson |
Professor |
United Kingdom |
Ian G. Watterson |
Dr |
Australia |
Andrew Weaver |
Professor |
Canada |
Peter J. Webster |
Professor |
USA |
Ray F. Weiss |
Professor |
USA |
James W.C. White |
Professor |
USA |
Jürgen Willebrand |
Professor Emeritus |
Germany |
Larry Winter |
Deputy Director NCAR |
USA |
Carl Wunsch |
Professor of Physical Oceanography |
USA |
Xubin Zeng |
Professor |
USA |
Guang J. Zhang |
Research Meteorologist |
USA |