LiveScience Topic:
Global Warming: News, Facts, Causes & Effects

Global warming is the term used to describe a gradual increase in the average temperature of the Earth's atmosphere and its oceans, a change that is believed to be permanently changing the Earth’s climate. There is great debate among many people, and sometimes in the news, on whether global warming is real (some call it a hoax). But climate scientists looking at the data and facts agree the planet is warming. While many view the effects of global warming to be more substantial and more rapidly occurring than others do, the scientific consensus on climatic changes related to global warming is that the average temperature of the Earth has risen between 0.4 and 0.8 °C over the past 100 years. The increased volumes of carbon dioxide and other greenhouse gases released by the burning of fossil fuels, land clearing, agriculture, and other human activities, are believed to be the primary sources of the global warming that has occurred over the past 50 years. Scientists from the Intergovernmental Panel on Climate carrying out global warming research have recently predicted that average global temperatures could increase between 1.4 and 5.8 °C by the year 2100. Changes resulting from global warming may include rising sea levels due to the melting of the polar ice caps, as well as an increase in occurrence and severity of storms and other severe weather events.

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cloud cover and climate change
A new study is being touted as the death knell for the existence of global warming. Not so fast, climate researchers say.
The ice-covered ocean at the North Pole is yielding secrets to scientists aboard the Coast Guard research ship Healy. During summer melts, remote piloted vehicles, cameras, sounders and scanners probe for subtle clues to Earth’s changing climate.
The ice-covered ocean at the North Pole is yielding secrets to scientists aboard the Coast Guard research ship Healy. During summer melts, remote piloted vehicles, cameras, sounders and scanners probe for subtle clues to Earth’s changing climate.
View the beauty and mystery of the ocean realm captured on video around the globe.
arctic ice melt, arctic sea ice melt, arctic sea ice, arctic climate change, climate change, global warming, arctic sea ice decline, satellite record arctic sea ice
Reduced ice cover is part of a years-long trend.
polar bears swimming
Warmer temperatures from climate change are forcing polar bears to swim longer distances to find stable sea ice.
polar bears swimming
Melting sea ice is increasing polar bear cubs' mortality rates because their mothers are forced to swim longer distances in search of steady ice or land.
bts, nsf, behind the scenes, national science foundation, Climate Change, Plan for the Future, predict, regional scale, supercomputers, El Nino, La Nina, ocean, land, atmosphere,
How Understanding Climate Change will help us Plan for the Future
tropical-beach-ocean-scene
Findings could help better understand global warming today.
Looking Ahead at Local Climate
Responding to the challenge of climate change requires understanding more about climate variability and the changes expected.
Gray whale breaching.
Gray whales survived many cycles of climate change over millions of years, thanks to a surprising ability to adapt.
Pirate attacks keep ships that record weather data out of the area.
Ross ice shelf, sea level rise, glacier, antarctica, melting, iceberg
Like an ice cube in a glass of warm water, warmer ocean temperatures below the surface could quickly erode Antarctic and Greenland glaciers.
Tammar Wallaby, wallaby,
The bacteria in the wallaby's gut digests plant material without producing as much methane as the gut bacteria of other mammals
Cumulus Clouds
Forget hurricanes and floods, routine weather alone can mean money.
An image of the sunspot with the Earth shown to scale. The image has been colorized for aesthetic reasons. This image with 0.1 arcsecond resolution from the Swedish 1-m Solar Telescope represents the limit of what is currently possible in terms of spati
A dip in solar activity has been forecast for at least the next decade, what effect will it have on global temperatures?
Sea level rise is swamping coasts; Rodanthe in the Outer Banks of North Carolina is pictured.
The rate of sea level rise off the East Coast of the US is faster than it's been in the last 2,000 years.
 
The cause of the collapse of a Viking colony in Greenland has long been debated.
Studying ice cores shows how ancient ice contains records of Earth’s past climate. Over 400,000 years, levels of carbon dioxide have risen and fallen, varying from colder in the Ice Ages to warmer in interglacial periods.
Studying ice cores shows how ancient ice contains records of Earth’s past climate. Over 400,000 years, levels of carbon dioxide have risen and fallen, varying from colder in the Ice Ages to warmer in interglacial periods.
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