Sentences with phrase «caused by human emissions»

If we add in the warming effects of the other long - lived greenhouse gases, the best estimate rises to 1.22 °C surface warming caused by human emissions (we've only observed ~ 0.8 °C warming because much of that has been offset by human aerosol emissions).

For short time variations (1 month to years), the incluence is about 3 ppmv / °C, mainly caused by upper ocean absorption / desorption, superposed over the overall CO2 trend caused by human emissions.

As they stand at present the models assume a generally static global energy budget with relatively little internal system variability so that measurable changes in the various input and output components can only occur from external forcing agents such as changes in the CO2 content of the air caused by human emissions or perhaps temporary after effects from volcanic eruptions, meteorite strikes or significant changes in solar power output.

Professor Murry Salby's lecture carries this two steps further in a) postulating an alternate hypothesis for natural changes in atmospheric CO2 levels and b) effectively falsifying the claim that C12 / C13 isotope measurements provide «smoking gun proof» for the postulation that increased CO2 levels are being caused by human emissions.

Nevrtheless, the entire increase in mass in the atmosphere is caused by the human emissions, because the natural cycle now shows a deficit of halve the human emissions.

Given the many uncertainties involved it seems pretty cavalier to assume that the earth's carbon cycle has been determined and that the increase in CO2 is unequivocally caused by human emissions.

It is faithfully reported as 66 % of climate scientists practicing in the field who believe half or more of the current warming is caused by human emissions of greenhouse gases.

The SCC assumes that the increase in atmospheric CO2 is caused by human emissions.

Still 100 % of the increase (in mass) is caused by human emissions... We can use that to calculate the deep ocean — atmosphere exchanges:

The derivatives since 1960: The variability in sink rate is caused by temperature variability, the offset and slope of dCO2 / dt is caused by human emissions.

The claim is often made that climate realists (a.k.a. skeptics) can not point to peer - reviewed papers to support their position that there is no evidence of «dangerous global warming:» caused by human emissions of so - called «greenhouse» gases, including carbon dioxide.

In the meantime expect an extreme heat super-interglacial caused by human emissions.

An upper limit that could ever be reached (assuming the increase is caused by human emissions) would seem to be based on the total amount of fossil fuels remaining on our planet.

What fraction of the global warming was caused by human emissions of CO2?

I believe that the data strongly supports the fact that the underlying trend in CO2 is caused by human emissions.

The models currently assume a generally static global energy budget with relatively little internal system variability so that measurable changes in the various input and output components can only occur from external forcing agents such as changes in the CO2 content of the air caused by human emissions or perhaps temporary after effects from volcanic eruptions, meteorite strikes or significant changes in solar power output.

All five research groups came to the conclusion that last year's heat waves could not have been as severe without the long - term climatic warming caused by human emissions.

For instance, the long - term warming effects of CO2 and other greenhouse gases are largely buffered by the ocean, which absorbs more than 90 percent of the excess heat caused by human emissions of CO2 and other greenhouse gases.

Do you assert the coral died because the ocean wasn't alkaline enough and that this was caused by human emissions alone?

These facts help explain why, in spite of the Earth's air temperature increasing to a level that the IPCC claims is unprecedented in the the past millennium or more, a recent study by Randall et al. (2013) found that the 14 % extra carbon dioxide fertilization caused by human emissions between 1982 and 2010 caused an average worldwide increase in vegetation foliage by 11 % after adjusting the data for precipitation effects.

But if they can be linked to warmer conditions globally, then these would be most likely caused by solar variations or cosmic rays, a recovery from the LIA and certainly not due to increases in CO2 levels, which aren't caused by human emissions anyway.

That precisely ALL of the modern warming is caused by human emissions?

Logically, if the warming back then was caused by human emissions of CO2 it would not have stopped in 1996 — 1998 because humans didn't stop emitting CO2.

(2) Prudence requires us to mitigate global warming, even if we are not sure it is being caused by human emissions (and we are sure, and this new skeptical study does not reduce that high level of certainty).

But temperatures are running so far ahead of those during the last strong El Niño, in 1997 and 1998, that scientists said the records would not be occurring without an underlying trend caused by human emissions of greenhouse gases.

Is the prevailing opinion that that upward trend is primarily caused by human emissions of greenhouse gases or am I looking at a natural phenomenon that humans are now adding to?

All five research groups came to the conclusion that last year's heat waves could not have been as severe without the long - term climatic warming caused by human emissions.

The first report concludes that global warming is happening, and is very likely caused by human emissions of greenhouse gases.

«Far more people believe that climate change is happening and is caused by human emissions,» primatologist Jane Goodall told New Scientist.

The key conclusions were that: It is «unequivocal» that global warming is occurring; the probability that this is caused by natural climatic processes is less than 5 %; and the probability that this is caused by human emissions of greenhouse gases is over 90 %.

The average land temperature on earth has risen 2.5 degrees Fahrenheit over the past 250 years — essentially all of it caused by human emission of greenhouses gases.

Not exact matches

Those changes have been driven by human - caused greenhouse gas emissions, which are warming the world and causing Earth's climate to change faster than reefs can keep up.

Just by changing the way we farm, by stopping deep tilling, mono - cropping, and chemical fertilizer use — the Climate Collaborative estimates regenerative carbon farming practices could mitigate as much as 4 billion to 6 billion tons of CO2 equivalents a year or 10 percent to 12 percent of global human - caused emissions.

He will continue to deny climate change caused by human activity; and will use his committee position to attack the EPA move to cut power plant carbon emissions.

The reason is that if climate change would not be human - caused, then humans would not be able to prevent it by scaling down their greenhouse gas emissions.

Emissions from vehicles, power plants, industrial operations, and other human activities are a primary cause of surface ozone, which is one of six main pollutants regulated in the U.S. by the Clean Air Act.

The request also calls for cuts in international climate programs such as SilvaCarbon, a forest assistance program supported by the U.S. Geological Survey and the U.S. Forest Service, and they are all links in a chain that is working toward providing effective measures of human - caused carbon dioxide emissions.

Since levels of greenhouse gases have continued to rise throughout the period, some skeptics have argued that the recent pattern undercuts the theory that global warming in the industrial era has been caused largely by human - made emissions from the burning of fossil fuels.

The scientists looked at the so - called biogenic fluxes or flow of the three greenhouse gases on land that were caused by human activities over the last three decades and subtracted out emissions that existed «naturally» during pre-industrial times.

Scientists can confidently say that Earth is warming due to greenhouse gas emissions caused by humans, but data on climate trends over the Antarctic and the surrounding Southern Ocean only go back to 1979 when regular satellite observations began.

The White House obviously accepts the science behind human - caused climate change, as was made clear again this week by its announcement of plans to cut carbon emissions from U.S.

At least two studies published since 2010 — one report from the United Nations Environment Programme in 2011 and a follow - up published in Science last year — suggested that significantly reducing the emissions of soot and methane could trim human - caused warming by at least 0.5 °C (0.9 ° F) by 2050, compared with an increase of about 1 °C if those emissions continued unabated.

But based on that data, they estimate that emissions from abandoned wells represents as much as 10 percent of methane from human activities in Pennsylvania — about the same amount as caused by current oil and gas production.

This suggests that the research community has a sound understanding of what the climate will be like as we move toward a Pliocene - like warmer future caused by human greenhouse gas emissions.»

Because we are not predisposed to believe climate change is caused by human greenhouse gas emissions, we are able to look at evidence the Intergovernmental Panel on Climate Change (IPCC) ignores.

It is not a good term to use to describe those who are rationally skeptical of the (not yet scientifically validated) premise that AGW, caused principally by the human emissions of CO2, has been the primary cause of past warming and that it represents a serious potential threat for humanity and the environment.

«The main worry is that if deforestation increases, in combination with the increase fragmentation, increase in drought probability [caused by climate change] and the use of fires by humans, carbon emissions could escalate to proportions never experienced before.»

Human aerosol emissions are also offsetting a significant amount of the warming by causing global dimming.

Marine scientists who met in Monaco in October 2008 released a strong statement on January 30, 2009 about ocean acidification accelerating due to increasing carbon emissions caused by human - induced climate change.

Analyses of the ground and aircraft data performed by Setyan et al. (2012), Shilling et al. (2013), and Kleinman et al. (2016) showed that organic aerosol production increased when human - caused emissions from Sacramento mixed with air rich in isoprene, an organic compound wafting from many plants that originate in the area's foothills.