Since each of the infrared -
absorbing atmospheric gases has its own unique absorption spectrum, the total infrared absorption capacity of the atmosphere is then due to the real - time concentration and distribution of all the gases in the atmosphere, from the surface to the stratosphere.
Since each of the infrared -
absorbing atmospheric gases has its own unique absorption spectrum, the total infrared absorption capacity of the atmosphere is then due to the real - time concentration and distribution of all the gases in the atmosphere, from the surface to the stratosphere.
Peacock, of the National Center for Atmospheric Research in Boulder, Colo., usually studies how the ocean's water
absorbs atmospheric gases.
New NASA research is one of the first studies to estimate how much and how quickly the ocean
absorbs atmospheric gases and contrast it with the efficiency of heat absorption.
Not exact matches
Transits can reveal atmospheres because as a planet passes in front of its star,
atmospheric gases can
absorb certain frequencies of the light passing through.
As
atmospheric carbon dioxide increases, the greenhouse
gas is
absorbed into ocean water, making it more acidic.
Plants are the original carbon capture and storage solution: as
atmospheric carbon dioxide levels rise, plants
absorb more of the
gas to fuel photosynthesis, and more carbon is stored in the soil.
Such a large temperature difference indicates that the planet's atmosphere
absorbs and re-radiates starlight so quickly that the
gas circling around it in the outer atmosphere cools off quickly — unlike Jupiter, which appears to have a relatively even temperature within planetary bands of
atmospheric circulation.
These rising
atmospheric greenhouse
gas concentrations have led to an increase in global average temperatures of ~ 0.2 °C decade — 1, much of which has been
absorbed by the oceans, whilst the oceanic uptake of
atmospheric CO2 has led to major changes in surface ocean pH (Levitus et al., 2000, 2005; Feely et al., 2008; Hoegh - Guldberg and Bruno, 2010; Mora et al., 2013; Roemmich et al., 2015).
Using
atmospheric devices on a 150 - foot tower in the Morgan - Monroe State Forest, IU researchers measured how much water vapor and
gases were being
absorbed and released by the forest.
What has happened to
atmospheric concentrations of CO 2 and other infrared -
absorbing gases so far and what have these
gases to do with human activity?
The climate models as described here won't produce glacial / interglacial cycles if run for a long time, and that is because they treat the
atmospheric content of trace IR -
absorbing gases (CO2, methane and N2O) as external forcings.
The radiative transfer problem is best addressed numerically with a sufficient number of vertical layers to resolve the
atmospheric temperature and
absorber distributions and with a sufficient number of spectral intervals to resolve the spectral dependence of the contributing
gases — as is being done in most GCMs.
Briefly put, the process can be defined as a CO2 molecule
absorbing a ~ 650 cm - 1 photon (equivalent to a thermal energy of about 900 K), and losing that energy to the surrounding bath of
atmospheric gases.
The elevation of the
atmospheric temperature is due to a shift in the radiative equilibrium, i.e. more back radiation
absorbed by added
gases, selective to IR radiation.
This works for biofuels, as growing crops
absorb atmospheric CO2 and convert it to sugars, oils, etc., leading to no net change in
atmospheric CO2 when the fuel is burned — but it does not work for coal, oil or natural
gas, however.
The majority (99.9 %) of
atmospheric gases nitrogen, oxygen and argon do not
absorb IR.
Thus, the phase change of water from liquid to
gas, after
absorbing photons, is a feedback, the absorption of photons and the emission of photons
atmospheric water vapor is a forcing, but the photons released when gaseous water become liquid water is a feedback.
When Oreskes quotes, ««Human activities... are modifying the concentrations of
atmospheric constituents... that
absorb or scatter radiant energy... [M] ost of the observed warming over the last 50 years is likely to have been due to the increase in greenhouse
gas emissions», her quotation is accurate and she actually emphasizes the word likely.
Sasano proceeded to explain the color - coding system of the iconic maps showing where regions were either
absorbing or emitting the trace
atmospheric gas.
An international team of researchers report in Nature Communications that they made a computer model of the planet's
atmospheric conditions: they included natural and human - triggered aerosols, volatile organic compounds, greenhouse
gases and other factors that influence temperature, one of which is albedo: the scientist's word for the capacity of terrain to
absorb or reflect solar radiation.
«It is possible that an increase in concentration of
atmospheric gases which
absorb the outgoing infrared radiation could result in a rise in average global temperature,» William McCollam, Jr., then president of EEI, admitted to Congress in 1989.
Iron — a nutrient naturally carried into the ocean by wind — encourages plankton growth, which can
absorb atmospheric CO2, a greenhouse
gas.
In 1928, George Simpson published a memoir on
atmospheric radiation, which assumed water vapour was the only greenhouse
gas, even though, as Richardson pointed out in a comment, there was evidence that even dry air
absorbed infrared radiation.
Students know the different
atmospheric gases that
absorb the Earth's thermal radiation and the mechanism and significance of the greenhouse effect.
Earth's Greenhouse Effect is described as all about radiant effects: Wiki: «The greenhouse effect is a process by which thermal radiation from a planetary surface is
absorbed by
atmospheric greenhouse
gases, and is re-radiated in all directions.
These so - called greenhouse
gases absorb infrared radiation, emitted by the Earth's surface, the atmosphere and clouds, except in a transparent part of the spectrum called the «
atmospheric window», as shown in Figure 1.2.
Conversely, as
atmospheric concentrations of carbon dioxide, methane, chlorofluorocarbons, and other
absorbing gases continue to increase, in large part owing to human activities, surface temperatures should rise because of the capacity of such
gases to trap infrared radiation.
Careful and comprehensive scientific assessments have clearly demonstrated that the Earth's climate system is changing rapidly in response to growing
atmospheric burdens of greenhouse
gases and
absorbing aerosol particles (IPCC, 2007).
Nations collectively to begin to reduce sharply global
atmospheric emissions of greenhouse
gases and
absorbing aerosols, with the goal of urgently halting their accumulation in the atmosphere and holding
atmospheric levels at their lowest practicable value;
Traditional anthropogenic theory of currently observed global warming states that release of carbon dioxide into atmosphere (partially as a result of utilization of fossil fuels) leads to an increase in
atmospheric temperature because the molecules of CO2 (and other greenhouse
gases)
absorb the infrared radiation from the Earth's surface.
Like carbon dioxide, many non-CO2
atmospheric gases absorb in the infrared and contribute to climate forcing.
And that to use it as an example or reason why we are thus NOT affecting the earth through a multi million year change in long lived
atmospheric greenhouse
gases — which
absorb and re radiate thermal radiation, slowly increasing the energy balance of the earth — is irrational.
Much of this IR is at wavelengths at which other
atmospheric constituents do not interact, so if CO2 is exposed to a warmer surface like the earth, it will
absorb radiation that would otherwise pass through into the cold of space AND likewise if CO2 is exposed to the cool of outer space it will emit vast quantities of IR at wavelengths which other
gases can not emit.
Because a cool ocean
absorbs atmospheric heat more readily, that has partially offset the
atmospheric warming caused by greenhouse
gases.
«THERE IS a good, but by no means certain, chance that the world's average climate will become significantly warmer during the next century, because of the increasing
atmospheric concentrations of infrared -
absorbing and re-radiating, so - called «greenhouse»»
gases.»
The position statement opens with the following: «Careful and comprehensive scientific assessments have clearly demonstrated that the Earth's climate system is changing rapidly in response to growing
atmospheric burdens of greenhouse
gases and
absorbing aerosol particles (IPCC, 2007).
86) There are no experimentally verified processes explaining how CO2 concentrations can fall in a few centuries without falling temperatures — in fact it is changing temperatures which cause changes in CO2 concentrations, which is consistent with experiments that show CO2 is the
atmospheric gas most readily
absorbed by water.
They claim that the
atmospheric absorbing gases that radiate can not heat the surface since they are cooler than the surface, due to the 2nd law of thermodynamics.
In addition, they found that in scenarios where the ocean current slows down due to the addition of heat, the ocean
absorbs less of both
atmospheric gases and heat, though its ability to
absorb heat is more greatly reduced.
But trees both
absorb and secrete
atmospheric gases, and research such as this is intended to discover more about the intricate link between living things and the air we breathe, and, ultimately, the climates that permit life on Earth to survive.
As the Atlantic Meridional Overturning Circulation (AMOC) slows down, the ocean
absorbs less of both
atmospheric gases and heat, though its ability to
absorb heat is more greatly reduced.
Fortunately, as depicted in Figure 2 (orange «thermal down surface» arrow), some of this energy does stay in the atmosphere, where it is sent back toward Earth by clouds, released by clouds as they condense to form rain or snow, or
absorbed by
atmospheric gases composed of three or more atoms, such as water vapor (H2O), carbon dioxide (CO2), nitrous oxide (N2O), and methane (CH4).
Yet before writing tha book, Sorenson decided to go ahead and publish his 2011 article because, as he says, «Eunice Foote deserves credit for being the first to recognize that certain
atmospheric gases, such as carbon dioxide would
absorb solar radiation and generate heat... [three] years before Tyndall's research that is conventionally credited with this discovery.»
I do need to check whether all of the 78 W / m ^ 2 is said to be
absorbed in the absorption wavelengths of GHGs or whether some of this is component is
absorbed in the absorption wavelenghts of other
gases and / or by
atmospheric aerosols.
Indeed, the
atmospheric CO 2 - concentrations are specified from IR
gas analyzer measuring the amount of IR light
absorbed in air samples (Keeling et al. 1976).
But let's put these unconventional views aside for a moment, and accept that certain
atmospheric gases (e.g., CO2, for one) DO
absorb more heat radiation than their more neutral cohorts (e.g., nitrogen and oxygen mostly).
Beginning (near the turn of the 20th century) with the theoretical studies of Svante Arrhenius about how infrared
absorbing gases help determine the surface temperature of the earth; then spurred by the reexamination of those models in the 1950's, by Roger Revelle, and in the 1960's, by Jule Charney; and then James Hansen's modeling of the unique green - house -
gas (GHG) forcing of the very hot
atmospheric temperature of Venus — climatologists and geophysicists began to vigorously reexamine such models in greater detail.
The atmosphere is a great
absorber at those discrete frequencies corresponding to an energy transition of an
atmospheric gas.
But now, to make sense of the precise link between greenhouse
gases and climate change, researchers must first understand in much greater detail how the oceans and the land
absorb atmospheric carbon, and in what quantities.