Introduction What are greenhouse gases? As the shortwave energy that in the visible and ultraviolet portion of the spectra heats the surface, longer-wave infrared energy heat is reradiated to the atmosphere. Many greenhouse gases occur naturally in the atmosphere, such as carbon dioxide, methane, water vapor, and nitrous oxide, while others are synthetic. Atmospheric concentrations of both the natural and man-made gases have been rising over the last few centuries due to the industrial revolution.
Both CO2 and CH 4 vary between glacial and interglacial phases, and concentrations of these gases correlate strongly with temperature.
However, various proxies and modeling suggests larger variations in past epochs; million years ago CO2 levels were likely 10 times higher than now. No volcanic carbon dioxide emission of comparable scale has occurred since.
In the modern era, emissions to the atmosphere from volcanoes are approximately 0. Major greenhouse gas trends. Since the beginning of the Industrial Revolutionthe concentrations of most of the greenhouse gases have increased.
Many observations are available online in a variety of Atmospheric Chemistry Observational Databases. Anthropogenic greenhouse gases[ edit ] See also: Climate change and ecosystems This graph shows changes in the annual greenhouse gas index AGGI between and Since about human activity has increased the concentration of carbon dioxide and other greenhouse gases.
As a result of this balance, the atmospheric mole fraction of carbon dioxide remained between and parts per million for the 10, years between the end of the last glacial maximum and the start of the industrial era.The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without its atmosphere..
If a planet's atmosphere contains radiatively active gases (i.e., greenhouse gases) they will radiate energy in all ph-vs.com of this radiation is directed towards the surface, warming it.
Greenhouse gases absorb reflected solar energy, making the Earth's atmosphere warmer. A lot of the sun’s energy reaches the ground directly, and a portion is reflected by the ground back into space.
A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range.
Increasing greenhouse gas emissions cause the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide and ozone. Greenhouse gas definition, any of the gases whose absorption of solar radiation is responsible for the greenhouse effect, including carbon dioxide, methane, ozone, and the fluorocarbons.
See more. Sep 27, · The point is, if the greenhouse effect is too strong, Earth gets warmer and warmer. This is what is happening now. Too much carbon dioxide and other greenhouse gases in the air are making the greenhouse effect stronger.
The greenhouse effect, combined with increasing levels of greenhouse gases and the resulting global warming, is expected to have profound implications, according to the near-universal consensus of.