Thank for your interest in the letter, U.S. Scientists' and Economists' Call for Swift and Deep Cuts in Greenhouse Gas Emissions. Below are additional resources and references regarding the letter. If you have any questions, please contact Jean Sideris at ssi@ucsusa.org or 617.547.5552

Resources:
Watch the UCS webinar on How to Avoid Dangerous Climate Change: A Target for U.S. Emissions Reductions

Intergovernmental Panel on Climate Change (IPCC)

UCS short summaries on the IPCC Fourth Assessment Report
WG1: Science
WG2: Impacts 
WG3: Mitigation 

UCS Analysis of Federal Climate Bills

References:
The references and resources listed below correspond to references mentioned in the footnotes of the letter, and are listed in footnote order.

[1] Climate Change 2007: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change.
For impacts on North America see North America in: Climate Change 2007: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change.
For additional reasons for concern see section 5.2 of Intergovernmental Panel on Climate Change Fourth Assessment Report Climate Change 2007: Synthesis Report.

[2] Technical Summary in: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change.

[3] Human-Induced Changes in the Hydrology of the Western United States, Science, 10.1126/science.1152538
 
[4] Synthesis report of the Northeast Climate Impacts Assessment (NECIA)

[5] Technical Summary in: Climate Change 2007: Mitigation. Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change

[6]Reducing U.S. Greenhouse Gas Emissions: How Much at What Cost? McKinsey & Company.
The Economics of Climate Change: The Stern Review.

[7] How to Avoid Dangerous Climate Change: A Target for U.S. Emissions Reductions.
Multi-gas emission pathways to meet climate targets. Climatic Change.
2007 Bali Climate Declaration by Scientists