Sentences with phrase «total global concentration»

As the agency put it, «Atmospheric concentrations increased by 4.4 molecules for every billion molecules of air, bringing the total global concentration up to 1788 parts per billion.»

Not exact matches

The absolutely essential first step in reducing the atmospheric concentration to 350 ppm is a total global cessation of anthropogenic carbon emissions.

Their results were not global and the did not show a total increase in ghg concentration b / c the omitted water vapor, the strongest and most abundant ghg!

Carbon dioxide emissions pathways defined in, or derived from, the original set of Representative Concentration pathways (RCPs), for the global total carbon dioxide emissions as well as for the carbon dioxide emissions attributable to U.S. electricity production.

This is true because most mainstream scientists have concluded that the world must reduce total global emissions by at the very least 60 to 80 percent below existing levels to stabilize GHG atmospheric concentrations at minimally safe atmospheric GHG concentrations and the United States is a huge emitter both in historical terms and in comparison to current emissions levels of other high emitting nations.

Since 2004, researchers in NOAA's Global Monitoring Division have released the Annual Greenhouse Gas Index: a single value that compares the total warming effect of each year's concentrations of heat - trapping gases to 1990 levels.

Working with a total of 2,196 globally - distributed databases containing observations of NPP, as well as the five environmental variables thought to most impact NPP trends (precipitation, air temperature, leaf area index, fraction of photosynthetically active radiation, and atmospheric CO2 concentration), Li et al. analyzed the spatiotemporal patterns of global NPP over the past half century (1961 — 2010).

That we face a future in which the carbon concentration rises above any plausibly safe level (it will, and quite soon) and must work to ensure that it subsequently peaks, and then drops back, far enough and fast enough to keep total global temperature change within manageable limits.

The total concentration of carbon dioxide, the main greenhouse gas fueling global warming, in our atmosphere is around 385 parts per million.

I did a modeling exercise a few years ago by tabulating different forcings — CO2 concentrations, sulfur emissions, total solar irradiance and the PDO and AMO — giving each a weighting and playing with the weightings until I got a best fit to the 20th century global temperature record.

That is, every national ghg emissions reduction target is implicitly a position on: (a) a safe ghg atmospheric stabilization target; and (b) the nation's fair share of total global ghg emissions that will achieve safe ghg atmospheric concentrations.

Any national ghg emissions reduction is implicitly a position on a safe atmospheric ghg concentration and that nation's fair share of total global emissions that will reach that target.

(Part of the How to Talk to a Global Warming Skeptic guide) Objection: Taking into account the logarithmic effect of CO2 on temperature, the 35 percent increase we have already seen in CO2 concentrations represents about three - quarters of the total...

For instance, about half the total rise in atmospheric CO2 concentration has occurred in just the last 30 years — and of all the global life - support systems, the carbon cycle is closest to no - return.

The forcing from changes in total solar irradiance alone does not seem to account for these observations, implying the existence of this unknown amplifying mechanism.The cosmic ray - ionization mechanism is too weak to influence global concentrations of CCN or their change over the last century or during a solar cycle in any climatically significant way.

First some countries much more than others are contributing to global atmospheric ghg concentrations on a per capita and total tons basis.

An adequate global climate change solution will need to limit total global ghg emissions to levels which will prevent atmospheric concentrations of ghgs from accumulating to dangerous levels and to do this any solution will also need to allocate total global emissions levels among all nations.

We'd have to drop total global emissions to zero now and for the rest of the century just to lower concentrations enough to stop temperatures from rising.