The Climate Science Special Report, Volume I of the Fourth National Climate Assessment (NCA4), assesses the physical science of climate change and provides the foundation for Volume II of NCA4.
Keep up with the process and progress of Vol. II of NCA4.
Read the National Global Change Research Plan 2012–2021: A Triennial Update, a report on the Program's progress since 2012.
USGCRP's annual report looks back (and ahead) at building the knowledge base needed to respond to global change.
Indicators communicate key aspects and related effects of the changing climate.