Sentences with phrase «higher atmospheric levels»

So, if you think that through, then for that to be true, in a period in which atmospheric CO2 levels have risen in proportion to human emissions, something else would also have had to be emitting large amounts of CO2 while at the exact same time that we are completely unaware of, and much more strangely, something we don't know about would have to be removing large amounts of CO2, otherwise we would have higher atmospheric levels of CO2 than we currently do.

But there is no scientifically valid evidence that CAGW will occur regardless of what is done or not done, and considerable evidence that higher atmospheric levels of CO2 and slightly higher global temperatures would be beneficial, not harmful.

This is because warmer temperatures and other changes in the atmosphere related to a changing climate, including higher atmospheric levels of methane, spur chemical reactions that lead to ozone.

The carbon they refer to is Carbon dioxide, / CO2 a gaseous product of the burning of practically any combustible product of this planet and a gas which if the planet lacked or was not present at a sufficiently high atmospheric level and had remained so for countless millenniums past, no sentient life or plant life would exist today.

Not exact matches

As shown in previous studies, the litter from the polluted site, which had endured high levels of atmospheric nitrogen oxides and ozone, had higher nitrogen content than litter from the clean site.

The relatively pleasant global climate of the past 10,000 years is largely thanks to higher levels of atmospheric carbon dioxide

Record emissions of carbon dioxide mean atmospheric concentrations have reached levels that lead to the highest temperature increases

India, another huge source of atmospheric pollution, recently allowed European scientists to measure its high - level aerosols, an experiment that also includes flights into Nepal and Bangladesh.

Also associated with this event are high levels of carbon dioxide in the atmosphere, which are linked to elevated ocean and atmospheric temperatures.

Overall, dippers had higher mercury levels than most other songbirds tested in western North America, which may be due to more atmospheric deposition of mercury in snow at these high elevations.

In the samples studied by the scientists, there are also high levels of atmospheric contamination from lead during the Roman Empire, when large quantities of this metal were extracted in the south of the Iberian Peninsula, as well as during the past 300 years, coinciding with the Industrial Revolution and the reactivation of mining activity in southern Spain.

The seven - day rainfall total from Harvey was as much as 40 percent higher than rainfall from a similar storm would have been decades ago, before human activity caused atmospheric carbon dioxide levels to spike, according to a study published yesterday in Geophysical Research Letters.

The ice core data also shows that CO2 and methane levels have been remarkably stable in Antarctica — varying between 300 ppm and 180 ppm — over that entire period and that shifts in levels of these gases took at least 800 years, compared to the roughly 100 years in which humans have increased atmospheric CO2 levels to their present high.

If it all thaws out, we may see the highest levels of atmospheric methane in 10,000 years.

«We found high levels of PCBs in a region of the world where we wouldn't expect to find them,» says Rosalinda Gioia, an atmospheric pollution researcher at Lancaster University, UK, and the lead author of the report of the high levels in Environmental Science & Technology.

«Wheat's photosynthetic pathway evolved 100 million years ago when atmospheric carbon dioxide levels were up to 10 times higher than they are today,» he said.

Although plants grown in high levels of carbon dioxide — say, double the current atmospheric concentrations — initially grow rapidly, the growth tapers off within weeks and the plants wind up with a low protein content.

Consequently, the atmospheric CO2 levels were higher in the presence of the soil fungi than without.

Once atmospheric CO2 levels rise and plants begins to photosynthesise at a higher rate, the fungi may not be able to provide nitrates quickly enough to meet the plants» demands.

Turning up the heat seems to increase the rate at which the plants produce methane, Keppler says, which could explain why atmospheric levels of methane were high hundreds of thousands of years ago when global temperatures were balmy.

This dynamic time for East Antarctic glaciers occurred when atmospheric temperatures and atmospheric CO2 levels were similar to or higher than present day.

Dr Tina Van De Flierdt, co-author from the Department of Earth Science and Engineering at Imperial College London, says: «The Pliocene Epoch had temperatures that were two or three degrees higher than today and similar atmospheric carbon dioxide levels to today.

«Modern atmospheric carbon dioxide levels are today equivalent to those about three million years ago, when sea level was at least six meters higher because the ice sheets were greatly reduced.

A well - known example are dinosaurs: Many theories about animal gigantism offer high levels of atmospheric oxygen as an explanation.

The tropical rainforest was able to persist under elevated temperatures and high levels of atmospheric carbon dioxide,.......

If coal mining emitted anywhere near that level it would dwarf all other sources of methane and atmospheric levels would be much higher (easily 5 ppm, maybe higher).

April will be the first time in human history where levels of atmospheric carbon dioxide were higher than 400 parts per million for an entire month, one scientist who monitors the levels said.

A 2015 USDA report (Brown et al. 2015) on how climate affects agriculture delineates the sensitivities of specialty crops to many climate components (e.g., temperatures, atmospheric CO2 levels, water supply, cloud and light conditions, high winds and other extreme conditions).

However, current levels of atmospheric CO2 are higher than those in the last 3 million years (Zhang et al. 2013), and these levels are likely to drive changes to climate (Solomon et al. 2009).

The evidence here is more circumstantial, but Danish researcher Lars - Georg Hersoug notes that atmospheric levels of the gas have risen during the same period and that in the United States, obesity has increased most rapidly on the East Coast, where CO2 concentrations are highest.

At altitudes of 5000 m and higher, life is not easy here: the atmospheric pressure is much lower than at sea level, and oxygen is scarce.

His research in atmospheric chemistry, climate change and energy has involved him in shaping science and environmental policy at the highest levels nationally and internationally.

If greenhouse gases were responsible for global temperature increases in recent decades, atmospheric physics require that higher levels of our atmosphere would show greater warming than lower levels.

«Although Irene never reached the highest category levels of intensity, it did cause enough havoc to at least merit consideration,» said atmospheric scientist Eugene McCaul of NASA's Marshall Space Flight Center.

Others include poisoning of water supplies, high levels of atmospheric ash, crop damage, and disruption to transport.

Production values aren't sky - high, but there are atmospheric moments, particularly when it goes dark and you're given a flashlight (I just wish it could be held it in both orientations), and levels have been designed intelligently to play to the strengths of VR.

When snowfall is high in Siberia, the resultant cold air enhances atmospheric disturbances, which propagate into the upper level of the atmosphere, or stratosphere, warming the polar vortex.

No matter how scurrilous the actions of the oil companies, will the plaintiffs be able to show that the actions have resulted in higher atmospheric CO2 levels, rising seas, and significant increased infrastructure costs for the plaintiffs?

This is inconsistent with the idea that higher levels of atmospheric greenhouse gases will result in increased Atlantic hurricane activity.»

If coal mining emitted anywhere near that level it would dwarf all other sources of methane and atmospheric levels would be much higher (easily 5 ppm, maybe higher).

Very stormy background due to chaotic distribution of cold and hot regions (icebergs from disintegrated ice sheets, and high levels of atmospheric CO2), due to global deglaciation.

Cosmic ray ionisation plays a minor role at ground level but it is the predominant ionising agent in higher atmospheric layers, already above a few kilometres.

If greenhouse gases were responsible for global temperature increases in recent decades, atmospheric physics require that higher levels of our atmosphere would show greater warming than lower levels.

The whole issue is that any level above what is often called the «effective radiating level» (say, at ~ 255 K on Earth) should start to cool as atmospheric CO2 increases, since the layers above this height are being shielded more strongly from upwelling radiation... except not quite, because convection distributes heating higher than this level, the stratosphere marks the point where convection gives out and there is high static stability.

As the atmospheric opacity is increased (e.g., 2xCO2), the physical location of the TAU = 1 level will rise to a higher altitude, but the outgoing flux will still come from the TAU = 1 level since radiation doesn't care about the geometric scale), and the TAU = 1 level will still correspond to the same temperature (since the solar input energy is unchanged).

Also these trends this century are against a background of higher than estimated man made CO2 emmisions and also that the forcing factor of this affect must have already been at its highest level during the 21st century and can only decline as total atmospheric CO2 increases.

Growing trees that then release their carbon 100 years from now might reduce the size of the transient atmospheric high level, without changing the long climate tail.

Put it this way if atmospheric levels of CO2 were fixed at to - day's level (380ppm) indefinitely when would we see global temperatures 0.5 deg C higher than to - day.

Their argument is that tropical Cumulonimbus (thunderstorm) clouds procuce less high - level cirrus - cloud outflow when sea surface temperatures (SST's) are warmer and atmospheric water vapor is higher.

The physics underlying the lapse rate will insure dew point temperatures at some level in the atmospheric column, although the level will increase with global warming (the resulting high (er) clouds may give a positive feedback).