Sentences with phrase «average atmospheric emission»

But the average atmospheric emission absorbed by the surface is not emitted from the bottom millimeter, or the bottom meter.

Not exact matches

If humanity does not act to reduce global greenhouse gas emissions, atmospheric carbon dioxide levels will continue to climb and Earth's average temperature will escalate.

The work is an estimate of the global average based on a single - column, time - average model of the atmosphere and surface (with some approximations — e.g. the surface is not truly a perfect blackbody in the LW (long - wave) portion of the spectrum (the wavelengths dominated by terrestrial / atmospheric emission, as opposed to SW radiation, dominated by solar radiation), but it can give you a pretty good idea of things (fig 1 shows a spectrum of radiation to space); there is also some comparison to actual measurements.

If we multiply that over ten years, and figure that the top billion or so of world population is responsible for the lion's share (say 80 %) of the emissions, could we then conclude that, on average, every member of that top billion (presumably including all on this forum) had contributed the energy equivalent of one Hiroshima bomb (or more) toward atmospheric global warming over the last decade?

The processes (absorption of light, collisional energy transfer and emission) can be separated because the average time that an isolated CO2 molecule takes before it emits a photon is much longer that the time for collisional de-excitation (~ tens of microseconds at atmospheric pressure, less, higher in the atmosphere).

Future projections show that, for most scenarios assuming no additional GHG emission reduction policies, atmospheric concentrations of GHGs are expected to continue climbing for most if not all of the remainder of this century, with associated increases in average temperature.

Taking account of their historic responsibility, as well as the need to secure climate justice for the world's poorest and most vulnerable communities, developed countries must commit to legally binding and ambitious emission reduction targets consistent with limiting global average surface warming to well below 1.5 degrees Celsius above preindustrial levels and long - term stabilization of atmospheric greenhouse gas concentrations at well below below 350 p.p.m., and that to achieve this the agreement at COP15 U.N.F.C.C.C. should include a goal of peaking global emissions by 2015 with a sharp decline thereafter towards a global reduction of 85 percent by 2050,

Human emissions equate to an increase of 4.5 ppmv, yet atmospheric CO2 only increases on average by 2.2 ppmv.

And although emissions were recently near the top of the range that has been covered6, the changes in atmospheric CO2 concentration follow long - term average emissions rather than short - term variations.

Using this data set we find that atmospheric carbon dioxide emissions have increased by over 40 % from 1990 to 2008 with an annual average increase of 3.7 % over the five - year period 2003 — 2007.

Requires the President, if the NAS report finds that emission reduction targets are not on schedule or that global actions will not maintain safe global average surface temperature and atmospheric GHG concentration thresholds, to submit a plan by July 1, 2015, to Congress identifying domestic and international actions that will achieve necessary additional GHG reductions.

-- In the event that the Administrator or the National Academy of Sciences has concluded, in the most recent report submitted under section 705 or 706 respectively, that the United States will not achieve the necessary domestic greenhouse gas emissions reductions, or that global actions will not maintain safe global average surface temperature and atmospheric greenhouse gas concentration thresholds, the President shall, not later than July 1, 2015, and every 4 years thereafter, submit to Congress a plan identifying domestic and international actions that will achieve necessary additional greenhouse gas reductions, including any recommendations for legislative action.

Urban pollution concentrations depend on the magnitude of local emissions sources and the prevailing meteorological ventilation of the area — i.e., the height of the atmospheric layer through which the pollutants are being mixed and the average wind speed through that layer.

One can also review the Arctic atmospheric window emission temperatures and find that it is also higher than it really should be — the Arctic windows are emitting at 268K or -5 C which is quite a bit higher than the average temperature).

Although there have been jumps and dips, average atmospheric temperatures have risen little since 1998, in seeming defiance of projections of climate models and the ever - increasing emissions of greenhouse gases.»

Since the beginning of the 1980's, humanity has poured some 860 billion CO2 tonnes into the atmosphere; atmospheric CO2 levels keep climbing (see yellow boxes); yet, the average tropical atmospheric temperature has essentially not budged (see red dotted baseline) over 3 + decades of modern consumer / industrial human emissions.

org, US reductions need to be much greater than average reduction levels required of the entire world as a matter of equity because the United States emissions are among the world's highest in terms of per capita and historical emissions and there is precious little atmospheric space remaining for additional ghg emissions if the world is serious about avoiding dangerous climate change.

This is probably a point where you and I agree: namely that human CO2 emissions have a correlation with atmospheric CO2 levels on a multi-annual basis, even though the relation is not clear on a year - to - year basis, where between 15 % and 90 % of the emitted CO2 «remains» in the atmosphere., with this averaging out to around 50 % over the longer tem.

The researchers discovered a temperature increase of just 1 degree Celsius in near - surface air temperatures in the tropics leads to an average annual growth rate of atmospheric carbon dioxide equivalent to one - third of the annual global emissions from combustion of fossil fuels and deforestation combined.

There is a very clear relationship between the 12 month change in atmospheric carbon (GigatTonnes C ~ = 2.3 * ppmv), 12 month change in temperature, and carbon emissions, especially apparent on the 12 month averages of these things.

On a year - to - year basis there is absolutely no correlation between human CO2 emissions and atmospheric CO2 levels: the amount of human CO2 «staying» in the atmosphere swings between 15 and 88 percent of that emitted by humans, with a multi-year average of just under 50 %.

Increased generation from Victoria's brown coal plants with their relatively low thermal efficiencies has also lowered the average national thermal efficiency of power generation, leading to a corresponding rise in atmospheric emissions.

Half of the human emissions «disappear» right away, since on average the atmospheric concentration increase is about half the human emission; so the «residence time» of this fraction is 0.

A doubling of the pre-industrial levels of atmospheric CO2 of roughly 280 parts per million, which could occur within decades unless people curb greenhouse - gas emissions, could eventually boost global average temperatures by around 9 degrees C.»