Sentences with phrase «atmospheric emissions under»

Not exact matches

Continued use of fossil fuels into the 21st century is predicted to lead to atmospheric CO2 levels > 900 ppm by 2100 (under Representative Concentration Pathway (RCP) 8.5; Meinshausen et al., 2011), though the precise level is highly dependent on the emission scenario (Pachauri et al., 2014).

In other words, shells of these marine organisms may simply dissolve as soon as atmospheric CO2 reaches the levels that are expected to occur in about 50 years under the IS92a business - as - usual CO2 emissions scenario.

The first is climate inertia — on very many levels, from fossil lock - in emissions (decades), ocean - atmospheric temperature inertia (yet more decades), Earth system temperature inertia (centuries to millennia) to ecological climate impact inertia (impacts becoming worse over time under a constant stress)-- all this to illustrate anthropogenic climate change, although already manifesting itself, is still very much an escalating problem for the future.

But in reality, even with > 3 % / year emissions increase since 2000 (damn Yankees who refuse to stop buying SUVs & Chinese to stop building power plants), atmospheric CO2 is still under 380 ppmV in 2006.

By 2100, global atmospheric CO2 levels reach 550 and 970 ppm under the lower and higher emissions scenarios, respectively.

The devotees of both sides of the mainstream climate debate i.e. on the one hand those who warn against the dangers of global warming, which they attribute mainly to atmospheric emissions of carbon dioxide, and on the other those who assert that the theory of anthropogenic global warming is a fraud, resort to hysteria when they sense that their ideas are under threat.

You could help clairify things by answering the following question: If atmospheric layers A and B each contain greenhouse gases, under what conditions will we find that the rate of absorption by layer B of layer A's thermal emission equal the rate of absorption by layer A of layer B's emission?

-- 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.

Abstract - Although carbon dioxide emissions are by far the most important mediator of anthropogenic climate disruption, a number of shorter - lived substances with atmospheric lifetimes of under a...

Australia will unconditionally reduce our emissions by 5 % below 2000 levels by 2020, and by up to 15 % by 2020 if there is a global agreement which falls short of securing atmospheric stabilisation at 450 ppm CO2 - eq and under which major developing economies commit to substantially restrain emissions and advanced economies take on commitments comparable to Australia's.

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 %.

«I think the EPA has gone far beyond its mission under the Obama administration, and I think re-concentrating the agency on its core mission of protecting the environment and improving our environmental quality, rather than a huge climate regime, which has very little to do with reducing greenhouse gas emissions or atmospheric concentrations globally but has a lot to do with slowing down the economy through raising energy prices.

In a new study published in the Journal of Climate, the Community Earth System Model Large Ensemble (CESM - LENS) of simulations is used to explore how various characteristics of the mid-latitude atmospheric circulation (zonal flow, synoptic blockings, jet stream meanders) evolve along the course of the 21st century under the RCP8.5 scenario of anthropogenic emissions.