EPA has developed comprehensive technical documentation that describes the data sources and analytical methods for every indicator presented in the Climate Change Indicators in the United States report. A PDF version of the technical documentation is provided below for each indicator, along with an overview that describes EPA's process for selecting and evaluating indicators.

Additional files you can download from other pages:

• PDF versions of EPA's 2016 report and supporting elements
• Printer-friendly PDF versions of each indicator (containing all text and figures)
• PDF versions of previous editions of this report
• High-resolution figures and the numerical data underlying the figures (on each indicator page)

• Technical documentation overview (PDF)(15 pp, 339 K, August 2016)
• Antarctic Sea Ice technical documentation (PDF)(7 pp, 302 K, August 2016)
• Arctic Sea Ice technical documentation (PDF)(11 pp, 382 K, November 2016)
• Atmospheric Concentrations of Greenhouse Gases technical documentation (PDF)(16 pp, 431 K, August 2016)
• Bird Wintering Ranges technical documentation (PDF)(5 pp, 223 K, May 2014)
• Climate Forcing technical documentation (PDF)(7 pp, 248 K, August 2016)
• Cherry Blossom Bloom Dates in Washington, D.C. technical documentation (PDF)(3 pp, 173 K, April 2016)
• Coastal Flooding Documentation (PDF)(6 pp, 202 K)
• Drought technical documentation (PDF)(9 pp, 273 K, August 2016)
• Glaciers technical documentation (PDF)(8 pp, 260 K, August 2016)
• Global Greenhouse Gas Emissions technical documentation (PDF)(8 pp, 226 K, August 2016)
• Great Lakes Water Levels and Temperatures technical documentation (PDF)(7 pp, 268 K, August 2016)
• Heating and Cooling Degree Days technical documentation (PDF)(6 pp, 222 K, August 2016)
• Heat-Related Deaths technical documentation (PDF)(9 pp, 399 K, August 2016)
• Heat-Related Illnesses technical documentation (PDF)(7 pp, 209 K, August 2016)
• Heavy Precipitation technical documentation (PDF)(7 pp, 195 K, August 2016)
• High and Low Temperatures technical documentation (PDF)(10 pp, 244 K, August 2016)
• Ice Breakup in Two Alaskan Rivers technical documentation (PDF)(4 pp, 178 K, August 2016)
• Lake Ice technical documentation (PDF)(9 pp, 270 K, August 2016)
• Land Loss Along the Atlantic Coast technical documentation (PDF)(21 pp, 1 MB, May 2014)
• Leaf and Bloom Dates technical documentation (PDF)(7 pp, 216 K, August 2016)
• Length of Growing Season technical documentation (PDF)(5 pp, 233 K, August 2016)
• Lyme Disease technical documentation (PDF)(9 pp, 309 K, August 2016)
• Marine Species Distribution technical documentation (PDF)(6 pp, 255 K, August 2016)
• Ocean Acidity technical documentation (PDF)(6 pp, 295 K, August 2016)
• Ocean Heat technical documentation (PDF)(5 pp, 195 K, August 2016)
• Ragweed Pollen Season technical documentation (PDF)(5 pp, 208 K, August 2016)
• River Flooding technical documentation (PDF)(5 pp, 184 K, August 2016)
• Sea Level technical documentation (PDF)(11 pp, 301 K, August 2016)
• Sea Surface Temperature technical documentation (PDF)(6 pp, 184 K, August 2016)
• Snow Cover technical documentation (PDF)(6 pp, 210 K, August 2016)
• Snowfall technical documentation (PDF)(7 pp, 212 K, August 2016)
• Snowpack technical documentation (PDF)(6 pp, 223 K, August 2016)
• Streamflow technical documentation (PDF) (PDF)(7 pp, 201 K, March 2017)
• Stream Temperature technical documentation (PDF)(4 pp, 197 K, August 2016)
• Temperature and Drought in the Southwest technical documentation (PDF)(10 pp, 248 K, August 2016)
• Trends in Stream Temperature in the Snake River technical documentation (PDF)(4 pp, 171 K, August 2016)
• Tropical Cyclone Activity technical documentation (PDF)(8 pp, 223 K, August 2016)
• U.S. and Global Precipitation technical documentation (PDF)(6 pp, 183 K, August 2016)
• U.S. and Global Temperature technical documentation (PDF)(9 pp, 242 K, August 2016)
• U.S. Greenhouse Gas Emissions technical documentation (PDF)(6 pp, 249 K, August 2016)
• West Nile Virus technical documentation (PDF)(6 pp, 206 K, August 2016)
• Wildfires technical documentation (PDF)(13 pp, 548 K, August 2016)