An assessment of observed and projected climate trends in the United States forms the foundation for comprehensive analyses of climate-related vulnerabilities and risks.  

USGCRP oversaw the production of the Climate Science Special Report (CSSR) as Volume I of the Fourth National Climate Assessment. CSSR assesses the state of knowledge on human-caused climate change, with a primary focus on the United States, including observed and future projected changes in temperatures, precipitation patterns, extreme...

A report on the status of America’s forests and rangelands provides a baseline for monitoring future change and its effect on ecosystem services and livelihoods.  

Expanding populations, increased urbanization, land use change, and climate change continue to affect American forests and rangelands. Climate change and natural disturbances will alter forest and rangeland ecosystems and affect their ability to provide ecosystem services such as water quality protection, removal of pollutants from the atmosphere, and outdoor recreation. The most recent...

USGCRP efforts support building global change research capacity in developing countries.

USGCRP provides support to help sustain the core operations of three international science organizations: the World Climate Research Program (WCRP), which is the primary coordination mechanism for international research on the climate system; System for Analysis, Research and Training (START), which provides opportunities for research, education, and training to scientists, policymakers, and practitioners in developing countries; and Future Earth...

The oceans have absorbed almost all of the excess heat generated by increasing atmospheric greenhouse gas concentrations and a large fraction of anthropogenic carbon dioxide, with profound implications for ecosystems and the climate system. Ship-based hydrographic surveys are the only current means for simultaneously measuring physical, biological, and biogeochemical properties of the global oceans from the surface to the seafloor and are a crucial resource for understanding ocean change and its role in the climate system. Building on global hydrographic surveys underway since the...