Since 1989, the U.S. Global Change Research Program (USGCRP) has submitted annual reports to Congress called Our Changing Planet. The reports describe the status of USGCRP research activities, provide progress updates, and document recent accomplishments
In particular, Our Changing Planet highlights progress and accomplishments in interagency activities. These highlights represent the broad spectrum of USGCRP activities that extend from Earth system observations, modeling, and fundamental research through synthesis and assessment, decision support, education, and public engagement. Highlights describe the state of science at the time of publication of each yearly report, and may not reflect more recent advances in understanding. The date of publication of the source report is noted on each highlight page.
A next-generation modeling system supports assessment of changing climate risks.
NOAA, the USGS, and Princeton University scientists contributed to the development of a new modeling system for seasonal-to-multidecadal climate predictions and projections, SPEAR (Seamless System for Prediction and Earth System Research), at NOAA’s Geophysical Fluid Dynamics Laboratory.[1] SPEAR combines a set of newly developed components that...
Surveys of adaptation efforts adopted by businesses highlight opportunities for building resilience to complex climate events and other stressors.
Increases in the frequency and intensity of extreme climate and weather events put U.S. businesses at risk through closures, infrastructure damage, supply chain disruptions, and physical impacts on health and safety. The interaction among extreme events and other social and environmental stressors that affect U.S. businesses can lead to compound, simultaneous risks with impacts across multiple sectors that cause significant...
Studies of vulnerability to hurricane impacts in agriculture and forestry support efforts to reduce risks from future storms.
Three storms in the 2017 hurricane season caused catastrophic damage to communities, livelihoods, and infrastructure in the U.S. Southeast and Caribbean, including billions of dollars in losses in the agriculture and forestry sector. Climate change and other stressors are expected to increase damages and disruptions from hurricanes in the future, driving research to improve understanding of sector-specific vulnerabilities to storms and how best to...
Mapping forest carbon stocks with in situ, airborne, and satellite data supports forest management in the western United States.
The Carbon Monitoring System (CMS), a NASA-led effort also involving the USDA Forest Service (USDA-FS), NOAA, the USGS, and non-governmental scientists, focuses on improving the monitoring of carbon stocks and fluxes (or the movement of carbon between the oceans, atmosphere, land, and ecosystems) to support carbon management activities. A CMS study is helping the USDA-FS and other...
Recent studies are improving the ability to quantify ecosystem carbon dynamics and greenhouse gas exchange in changing Arctic and boreal landscapes.
Northern high latitudes are warming at more than twice the global average, driving permafrost thaw, changes in surface water extent, increased wildfire, and other changes that affect how much carbon is stored in and emitted to the atmosphere by soils, vegetation, and inland waters.[1] Measuring the flow of carbon between ecosystems, landscapes, and the...
Experimental warming of a peatland ecosystem showed a rapid shift towards net carbon loss to the atmosphere.
Peatlands cover only about 3 percent of Earth’s land surface but store around 30 percent of global soil carbon. As the climate warms, these carbon stocks are vulnerable to release into the atmosphere as the greenhouse gases carbon dioxide and methane, contributing to a cycle of further warming and carbon release. The SPRUCE (Spruce and Peatland Responses Under Changing Environments...
An interagency field campaign gathered data on interactions between the tropical ocean and atmosphere to improve weather and climate prediction.
Over the tropical ocean, interactions between winds and warm sea water form low-hanging clouds (known as shallow convective clouds) that act as the building blocks for storms. These clouds and air–sea interactions influence weather and climate conditions all over the world, but are poorly represented in models, in part due to a lack of detailed observations that are needed to understand and accurately simulate their behavior. In...
A multiyear observing campaign is tracking changing snowpack in the western United States, laying the groundwork for a future snow satellite mission.
Snowpack plays a critical role in the water cycle and helps regulate Earth’s climate. Storage of snow in the winter feeds spring snowmelt, bringing water to crops, people, and ecosystems downstream. Snowpack also feeds hydropower generation in the Southwest and Northwest, and snow-related tourism and recreation are important...
New ocean sensors will expand the ability of the global Argo Program to monitor and forecast changes in ocean chemistry and marine ecosystem health.
The international Argo Program maintains a global fleet of nearly 4,000 ocean floats that help scientists understand how the ocean is changing over time. Underwater sensors provide data on trends related to climate change, including ocean temperature and heat content, salinity and freshwater content, sea level, and large-scale ocean circulation. Now, the program is innovating...
Interagency observations and analyses show that emissions of the second-most important ozone-depleting substance are back on the decline after a recent surge.
Atmospheric measurements show that concentrations of ozone-depleting gases are declining in response to global controls on their production and use enacted under the Montreal Protocol of 1987 and its amendments. The decline since the early 1990s in the atmospheric concentration of trichlorofluoromethane (CFC-11), once widely used as a foaming agent and refrigerant, has been an important component of ozone layer...