The second "State of the Climate Cycle Report" (SOCCR2) aims to elucidate the fundamental physical, chemical, and biological aspects of the carbon cycle and to discuss the challenges of accounting for all major carbon stocks and flows for the North American continent. This assessment report has broad value, as understanding the carbon cycle is not just an academic exercise. Rather, this understanding can provide an important foundation for making a wide variety of societal decisions about land use and natural resource management, climate change mitigation strategies, urban planning, and energy production and consumption. To help assure the quality and rigor of SOCCR2, this report provides an independent critique of the draft document.

The second "State of the Climate Cycle Report" (SOCCR2) aims to elucidate the fundamental physical, chemical, and biological aspects of the carbon cycle and to discuss the challenges of accounting for all major carbon stocks and flows for the North American continent. This assessment report has broad value, as understanding the carbon cycle is not just an academic exercise. Rather, this understanding can provide an important foundation for making a wide variety of societal decisions about land use and natural resource management, climate change mitigation strategies, urban planning, and energy production and consumption. To help assure the quality and rigor of SOCCR2, this report provides an independent critique of the draft document.

Climate change poses many challenges that affect society and the natural world. With these challenges, however, come opportunities to respond. By taking steps to adapt to and mitigate climate change, the risks to society and the impacts of continued climate change can be lessened. The National Climate Assessment, coordinated by the U.S. Global Change Research Program, is a mandated report intended to inform response decisions. Required to be developed every four years, these reports provide the most comprehensive and up-to-date evaluation of climate change impacts available for the United States, making them a unique and important climate change document. The draft Fourth National Climate Assessment (NCA4) report reviewed here addresses a wide range of topics of high importance to the United States and society more broadly, extending from human health and community well-being, to the built environment, to businesses and economies, to ecosystems and natural resources. This report evaluates the draft NCA4 to determine if it meets the requirements of the federal mandate, whether it provides accurate information grounded in the scientific literature, and whether it effectively communicates climate science, impacts, and responses for general audiences including the public, decision makers, and other stakeholders.

"The Second State of the Carbon Cycle Report (SOCCR2) provides a current state-of-the-science assessment of the carbon cycle in North America (i.e., the United States, Canada, and Mexico) and its connection to climate and society"--Page 1.

To hide its dramatic findings, the government quietly released its mandated Climate Assessment Report on Black Friday 2018. Now, this full color reproduction is the definitive edition of ”the most comprehensive assessment of the effects of climate change on the United States” (The New York Times), which every citizen should own. The US Global Change Research Program (USGCRP) is mandated by law "at least every four years ... to submit to the president and the Congress an assessment regarding the findings of ... the effects of global change, and current and major long-term trends in global change." The report was released by the Trump administration without fanfare in the wake of a series of some of the most devastating hurricanes in American history, as well as the horrific California wildfires. As the report says, "The assumption that current and future climate conditions will resemble the recent past is no longer valid." Detailing not only the destructive toll of global warming on the environment, but also the related health issues leading to tens of thousands of deaths per year, and economic losses of tens of billions of dollars, the report concludes that "The evidence of human-caused climate change is overwhelming and continues to strengthen, that the impacts of climate change are intensifying across the country, and that climate-related threats ... are rising."

A practical guide to understanding, using and producing downscaled climate data, for researchers, graduate students, policy makers and practitioners.