Global warming is primarily a problem of too much carbon dioxide (CO2) in the atmosphere—which acts as a blanket, trapping heat and warming the planet.

The chart shows the probability distribution of global warming projections when the IPCC Fifth Assessment Report’s climate model ensemble, known as CMIP5, is run with the RCP8.5 forcing trajectory.

Global warming, the phenomenon of increasing average air temperatures near the surface of Earth over the past one to two centuries.

Climate has changed when the planet received more or less sunlight due to subtle shifts in its orbit, as the atmosphere or surface changed, or when the Sun’s energy varied. Global Warming. Throughout its long history, Earth has warmed and cooled time and again. NASA’s Operation Icebridge mission NASA’s Operation IceBridge images Earth's polar ice in unprecedented detail to better understand processes that connect the polar regions with the global … The "greenhouse effect" is the warming that happens when certain gases in Earth's atmosphere trap heat. Scientists have determined that a number of human activities are contributing to global warming by adding excessive amounts of greenhouse gases to the atmosphere. Greenhouse gases such as carbon dioxide accumulate in the atmosphere and trap heat that normally would exit into outer space. According to the National Climate Assessment, human influences are the number one cause of global warming, especially the carbon pollution we cause by burning fossil fuels and the pollution-capturing we prevent by destroying forests. How to use global warming in a sentence. NASA’s Operation Icebridge mission NASA’s Operation IceBridge images Earth's polar ice in unprecedented detail to better understand processes that connect the polar regions with the global … Climate scientists have since the mid-20th century gathered detailed observations of various weather phenomena (such as temperatures, precipitation , and storms) and of related influences on climate (such as ocean currents and the atmosphere’s … As we burn fossil fuels like coal, oil and natural gas for energy or cut down and burn forests to create pastures and plantations, carbon accumulates and overloads our atmosphere. Global warming refers to the long-term rise in the average temperature of the Earth's climate system. On average, CMIP5 models hind-cast about twice as much warming in the lower atmosphere over the past 40 years as actually occurred. It is a major aspect of climate change, and has been demonstrated by the instrumental temperature record which shows global warming of around 1 °C since the pre-industrial period, although the bulk of this (0.9°C) has occurred since 1970. Global warming is the current increase in temperature of the Earth's surface (both land and water) as well as it's atmosphere. Global warming definition is - an increase in the earth's atmospheric and oceanic temperatures widely predicted to occur due to an increase in the greenhouse effect resulting especially from pollution. An interactive exploration of how global warming is affecting sea ice, glaciers and continental ice sheets worldwide. An interactive exploration of how global warming is affecting sea ice, glaciers and continental ice sheets worldwide. These gases let in light but keep heat …