"The scope of this report is to offer a summary of recent literature on the past and projected effects of climate change on hydrology and water resources (chapter 2) and then to summarize implications for key resource areas featured in Reclamation planning processes (chapter 3). In preparing the synthesis, the literature review considered documents pertaining to general climate change science; climate change as it relates to hydrology, water resources, and environmental resources; and application of climate change science in Western United States and region-specific planning assessments. [...] Chapter 1 provides context for document scope and intent. The synthesis is meant to tell a representative story covering significant climate change literature from the last couple of decades, but it does not provide an exhaustive citation of all the literature. Chapters 2 and 3 offer Reclamation region-specific 'starting-point' narratives for including climate change background in planning documents associated with NEPA and ESA compliance. Chapter 4 discusses graphical resources in Appendix B that show a central-tendency of projected climate changes over the each Reclamation region. It is significant to note that there are many ways to graphically package the projected climate information--this is only one way. Chapter 5 is a bibliography of all cited references. Appendix A provides a tabulated summary of all cited and related literature and an associated comprehensive bibliography. Appendix B provides map resources which describe geographic climate change information evident in current climate projections. The data used to generate Appendix B are at: http://gdo-dcp.ucllnl.org/downscaled_cmip3_projections/ dcpInterface.html. Appendix C offers a glossary."