Highlights

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.

USGCRP agencies mobilized support for research on the health implications of climate change.

As part of its mandate to promote international cooperation in global change research, USGCRP engages with the Belmont Forum, an international partnership that catalyzes funding for research in support of resilience and sustainability. USGCRP member agencies (including NOAA, NSF, USDA, and the National Institutes of Health) participated in the scoping, call text writing, review, and funding of nine research proposals on climate, environment, and health supported...

Scientists lower an array of instruments into the ocean from the side of their research vessel.

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 close-up view of an ocean float sitting upright near a shoreline, revealing its antennae and body of sensors.

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...

A map showing below average background methane levels in the Northeast, Southeast, and Northwest United States; close to normal levels in the Great Plains, Midwest, and partial Southwest regions; and above average levels in the San Juan Basin.

A coordinated observing campaign uncovered the causes of an unexpected methane plume spotted by satellite.

Methane is a potent greenhouse gas emitted by both...

An aerial view of the Polarstern during the day, drifting with Arctic sea ice.

The Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) project concluded a yearlong expedition into the Arctic ice pack, collecting data that aims to advance understanding, modeling, and prediction of Arctic environmental change.

Sea ice cover in the Arctic Ocean has shrunk dramatically over the past four decades as temperatures in the region have warmed at over twice the rate as the rest of the globe. This trend is expected to continue, resulting in nearly sea-ice free late...

The U.S. research centers that develop climate and Earth system models and the U.S. scientific community are key participants in long-running collaborative efforts to improve knowledge on climate change. A number of major interagency activities supporting improvements in climate modeling took place in 2019.

Most prominently, the World Climate Research Programme Coupled Model Intercomparison Project (CMIP) is currently in its sixth phase (CMIP6). The earlier phases of CMIP experiments have provided the research community...

A bar chart showing an increase in weather and climate disasters causing more than one billion U.S. dollars in direct losses from 1980 to 2020. Event types shown are drought, flooding, freeze, severe storm, tropical cyclone, wildfire, and winter storm.

Climate indicators show trends over time in key aspects of our environment, such as greenhouse gas levels in the atmosphere, temperatures across land and sea, and the extent of Arctic sea ice, as well as metrics of social or economic exposure to the impacts of climate variability and change. Indicators are based on long-term, consistently collected data and can be used to assess risks and vulnerabilities from a changing climate and to inform response actions. USGCRP’s Indicators Interagency Working Group (IndIWG) leverages existing agency research, data, and indicators in support of...

USGCRP’s International Activities Interagency Working Group (IAIWG) convened its first international and interagency workshop in December 2018, bringing together representatives from System for Analysis, Research and Training (START), Future Earth, and the World Climate Research Programme (WCRP). These three international programs receive funding through USGCRP to support their activities and to advance USGCRP’s international mandate. USGCRP was represented by ten Federal agencies as well as USGCRP staff. The workshop’s goals were to enhance awareness of mutual priorities, investments, and...

Satellite observations show significant declines in Arctic sea ice cover in recent decades as the climate has warmed,^[1] with impacts on fish and wildlife habitats that are important for subsistence, recreation, and tourist activities in the region. Retreating sea ice also contributes to increased storm surge, coastal flooding, and coastal erosion.^[2] Arctic sea ice plays a key role in moderating climate within and beyond the region, and understanding sea ice change is critical to projections of future...

A national system of physical, ecological, and societal indicators is considered a foundational component of the sustained assessment process, serving to help users understand the changing environment, assess risks and vulnerabilities, and make informed decisions to build resilience to change. A 2019 Federal–academic workshop sought to advance the development of socio-environmental systems indicators of climate change to support adaptation and resilience decisions at various scales in the United States.

This work was supported by the National Socio-Environmental Synthesis Center (...

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Highlights

Supporting international health and climate research

Understanding air–sea processes

Tracking ocean change

Investigating methane emissions in the San Juan Basin

Understanding rapid change in the Arctic

Modeling efforts drive advances in projections of future climate change

An interagency platform highlights important indicators of change

USGCRP enhances cooperation among international global change science organizations

An observing network tracks changes in Arctic sea ice cover

A collaboration explores socio-environmental systems indicators for climate change adaptation and resilience