The Greenhouse Effect, Simplified – Climate Change: Vital Signs of …
A simplified animation of the greenhouse effect. Credit: NASA/JPL-Caltech (Download en español.)
Causes | Facts – Climate Change: Vital Signs of the Planet
The Greenhouse Effect. Increasing Greenhouses Gases Are Warming the Planet. Scientists attribute the global warming trend observed since the mid-20 th century to the human expansion of the "greenhouse effect" 1 — warming that results when the atmosphere traps heat radiating from Earth toward space. Life on Earth depends on energy coming from ...
Scientists assess potential for super greenhouse effect in Earth's ...
2018年3月22日 · Scientists investigate whether continued warming on Earth could cause a super greenhouse effect in tropical regions to “run away” as it might have on Venus.
Carbon Dioxide - Climate Change: Vital Signs of the Planet
Carbon dioxide (CO 2) is an important heat-trapping gas, also known as a greenhouse gas, that comes from the extraction and burning of fossil fuels (such as coal, oil, and natural gas), from wildfires, and natural processes like volcanic eruptions.
Climate Change: Vital Signs of the Planet
Changes observed in Earth’s climate since the mid-20th century are driven by human activities, particularly fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth’s atmosphere, raising Earth’s average surface temperature.
Methane - Climate Change: Vital Signs of the Planet
Methane (CH 4) is a powerful greenhouse gas, and is the second-largest contributor to climate warming after carbon dioxide (CO 2). A molecule of methane traps more heat than a molecule of CO 2, but methane has a relatively short lifespan of 7 to 12 years in the atmosphere, while CO 2 can persist for hundreds of years or more.
Carbon dioxide controls Earth's temperature – Climate Change: …
2010年10月17日 · Water vapor and clouds are the major contributors to Earth's greenhouse effect, but a new atmosphere-ocean climate modeling study shows that the planet's temperature ultimately depends on the atmospheric level of carbon dioxide.
Amplified greenhouse effect shifts north's growing seasons
2013年3月10日 · An amplified greenhouse effect is driving the changes, according to Myneni. Increased concentrations of heat-trapping gasses, such as water vapor, carbon dioxide and methane, cause Earth's surface, ocean and lower atmosphere to warm.
Science fact, not fiction – Climate Change: Vital Signs of the Planet
2011年1月6日 · The greenhouse effect explains how certain heat-trapping (a.k.a. “greenhouse”) gases in our atmosphere keep our planet warm, by trapping infrared rays that Earth would otherwise reflect back out into space.
Just 5 questions: Aerosols - Climate Change: Vital Signs of the Planet
2009年12月7日 · It turns out that most aerosols are cooling — that is to say, they reflect the sun’s energy back out into space. There is only one aerosol — soot, also known as black carbon — that actually helps contribute to global warming by boosting the warming effects of greenhouse gases in the atmosphere.