An overview of the global climate change

While greenhouse gases absorb long wave radiation then emit heat energy in all directions, greenhouse walls physically trap heat inside of greenhouses and prevent it from escaping to the atmosphere.

Climate change will also alter the stability of food supplies and create new food security challenges for the United States as the world seeks to feed nine billion people by Over the past century, global average sea level has risen by about 8 inches. Joint planning with stakeholders across sectors, regions, and jurisdictions can help identify critical risks arising from interaction among systems ahead of time.

The energized molecules of gas then emit heat energy in all directions. Proactive management strategies, such as the use of projected stream temperatures to set priorities for fish conservation, can help reduce disruptions to tourist economies and recreation.

Increases in the frequency and intensity of extreme weather events, such as heat waves, droughts, and floods, can increase losses to property, cause costly disruptions to societyand reduce the availability and affordability of insurance.

Some climate changes currently have beneficial effects for specific sectors or regions. This report includes chapters on Mitigation, Adaptation, and Decision Support that offer an overview of the options and activities being planned or implemented around the country as local, state, federal, and tribal governments, as well as businesses, organizations, and individuals begin to respond to climate change.

The greenhouse effect is a natural occurrence that maintains Earth's average temperature at approximately 60 degrees Fahrenheit. In an increasingly interconnected world, U. Many Indigenous peoples are reliant on natural resources for their economic, cultural, and physical well-being and are often uniquely affected by climate change.

The amount of future climate change, however, will still largely be determined by choices society makes about emissions. Region Impacts close Northeast Communities are affected by heat waves, more extreme precipitation events, and coastal flooding due to sea level rise and storm surge.

While mitigation and adaptation efforts have expanded substantially in the last four years, they do not yet approach the scale considered necessary to avoid substantial damages to the economy, environment, and human health over the coming decades.

Such changes are projected to continue, and without substantial and sustained reductions in global greenhouse gas emissions, extinctions and transformative impacts on some ecosystems cannot be avoided in the long term. Such efforts are beginning at the federal, regional, state, tribal, and local levels, and in the corporate and non-governmental sectors, to build adaptive capacity and resilience to climate change impacts.

Northwest Changes in the timing of streamflow related to earlier snowmelt reduce the supply of water in summer, causing far-reaching ecological and socioeconomic consequences.


For example, salt marshes, reefs, mangrove forests, and barrier islands defend coastal ecosystems and infrastructure, such as roads and buildings, against storm surges. Global temperature degrees F changes from to In the atmosphere, some of the long wave radiation is absorbed by certain gases called greenhouse gases.

Actions to plan for and adapt to more frequent, widespread, and severe coastal flooding, such as shoreline protection and conservation of coastal ecosystems, would decrease direct losses and cascading impacts on other sectors and parts of the country.

More frequent and intense extreme weather and climate-related events, as well as changes in average climate conditions, are expected to continue to damage infrastructure, ecosystems, and social systems that provide essential benefits to communities.

Regional economies and industries that depend on natural resources and favorable climate conditions, such as agriculture, tourism, and fisheries, are vulnerable to the growing impacts of climate change.

Overview of Climate Change Science

Rising sea levels intensify coastal flooding and storm surge, and thus exacerbate threats to public safety during storms. The impacts of climate change are already being felt in communities across the country.

Concentration units are parts per million ppm or parts per billion ppbindicating the number of molecules of the greenhouse gas per million or billion molecules of air.

Aging and deteriorating water infrastructure, typically designed for past environmental conditions, compounds the climate risk faced by society. Some of the sun's incoming long wave radiation is reflected back to space by aerosols.

A wider range of scenarios, from 8 inches to more than 6 feet byhas been used in risk-based analyses in this report. Changes in global temperature degrees Fahrenheit from to. Global climate change is a major threat to coral reefs (Phinney et al., and references therein), with reefs already exhibiting climate warming effects in terms of coral bleaching due to zooxanthellae expulsion (Brown, ; Hughes et al., ).

NOAA is a source of timely and authoritative scientific data and information about climate. Our goals are to promote public understanding of climate science and climate-related events, to make our data products and services easy to access and use, to provide climate-related support to the private sector and the Nation’s economy, and to serve people making.

Oct 02,  · Climate change is a fundamental threat to sustainable development and the fight against poverty. The World Bank Group is concerned that without bold action now, the warming planet threatens to put prosperity out of reach of millions and roll back decades of development.

An overview of the greenhouse effect and other contributors to abrupt climate change. Graphic: Global warming from to A visualization of global temperature.

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Aug 23,  · Climate change is a fundamental threat to sustainable development and the fight against poverty. The World Bank Group is concerned that without bold action now, the warming planet threatens to put prosperity out of reach of millions and roll back decades of development.

This report is an authoritative assessment of the science of climate change, with a focus on the United States. It represents the second of two volumes of the Fourth National Climate Assessment, mandated by the Global Change Research Act of OVERVIEW.


An overview of the global climate change
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Global Climate Change