Sentences with phrase «of higher atmospheric carbon dioxide»

There are no deleterious consequences of higher atmospheric carbon dioxide levels.

The impact of higher temperature and marine productivity is evaluated in the model as a result of higher atmospheric carbon dioxide and oceanic nutrient concentrations.

«They are using this information to test state - of - the - art climate models under conditions of high atmospheric carbon dioxide concentrations, similar to those expected by the end of this century.»

The future impacts of anthropogenic global change on marine ecosystems are highly uncertain, but insights can be gained from past intervals of high atmospheric carbon dioxide partial pressure.

The Triassic was also a hothouse world: a time of high atmospheric carbon dioxide, rapid climate shifts, and fast - moving extinctions.

This would then lead to large, unpredictable changes in ocean ecosystem structure and productivity, on top of other large unpredictable changes to be expected from ocean acidification, the other great oceanic consequence of high atmospheric carbon dioxide concentrations from fossil fuel burning.

Not exact matches

The researchers believe the greening is a response to higher atmospheric carbon dioxide inducing decreases in plant stomatal conductance — the measure of the rate of passage of carbon dioxide entering, or water vapor exiting, through the stomata of a leaf — and increases in soil water, thus enhancing vegetation growth.

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

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

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.

The OCO mission aimed to make unique and high quality measurements of the atmospheric column of carbon dioxide at high spatial resolution.

The atmospheric concentration of carbon dioxide, a critical greenhouse gas, is higher than it has been for at least 650,000 years.

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.

Within that range of atmospheric density, even higher concentrations of carbon dioxide wouldn't have been adequate to counteract the faint young sun, suggesting that methane, ethane or other strong greenhouse gases kept Earth from freezing.

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

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.

The definition uses atmospheric databases called HITRAN (high - resolution transmission molecular absorption) and HITEMP (high - temperature spectroscopic absorption parameters) that characterize planetary atmospheres in light of how both carbon dioxide and water are absorbed.

The higher concentrations of atmospheric carbon dioxide throughout the PETM decreased the nutritional value of plant material, however, leading to a temporary decrease in the size of some herbivorous insects and mammals.

A report published last year by the National Institutes of Health attributes greater pollen to higher atmospheric carbon dioxide — the result of industrial and automotive pollution.

For example, they describe the unexpectedly high amounts of beetle herbivory in soybeans in response to elevated atmospheric carbon dioxide, as evidenced by FACE experiments.

A new study by Stanford University atmospheric scientist Mark Jacobson has revealed that worsening air pollution and higher carbon dioxide emissions go hand - in - hand - the results suggest intensifying global warming will increase the number of smog - related deaths.

And, the IPCC projection is probably too high because it was driven by a collection of climate models which new science indicates produce too much warming given a rise in atmospheric carbon dioxide levels.

The year as a whole gave miserable summer weather to many, and there has been no upward trend of temperatures since the highs of 1998, despite steadily rising atmospheric carbon dioxide levels.

in response to the increase of atmospheric carbon dioxide, the excess of precipitation over evaporation increases, and surface salinity is reduced in high latitudes as noted in section 8.

Some regions may even shift from being a carbon sink to being an atmospheric carbon dioxide source, 50,51,52 though large uncertainties exist, such as whether projected disturbances to forests will be chronic or episodic.31 Midwest forests are more resilient to forest carbon losses than most western forests because of relatively high moisture availability, greater nitrogen deposition (which tends to act as a fertilizer), and lower wildfire risk.50, 51,53

From the University of California — Riverside, and the department of sulfurous odors, comes this «it must be carbon dioxide» moment: «Also associated with this event are high levels of carbon dioxide in the atmosphere, which are linked to elevated ocean and atmospheric temperatures.

Pierrehumbert RT 2004: High levels of atmospheric carbon dioxide necessary for the termination of global glaciation Nature 429, 646 - 649.

Victor argues that policymakers should instead focus on a suite of «vital signs» that are more tightly linked to carbon emissions, including atmospheric carbon - dioxide concentrations, ocean heat content, and high - latitude temperature changes.

Global - average atmospheric concentrations of carbon dioxide rose to 389 parts per million in 2010, 39 % higher than at the start of the industrial era in 1750.

The CCSM indicated that ocean waters warmed significantly at higher latitudes because of rising atmospheric levels of carbon dioxide (CO2), a greenhouse gas.

When NASAâ $ ™ s James Hansen sounded the alarm in Congress 20 years ago, he predicted that rising concentrations of atmospheric carbon dioxide, or CO2, would drive global temperatures higher by 0.34 degrees Celsius during the 1990s.

In another journal, Geohealth, Dr Myers and a different set of colleagues warn that higher atmospheric carbon dioxide levels are also associated with lower iron content in food crop staples.

Increased weed and pest pressure associated with longer growing seasons and warmer winters will be an increasingly important challenge; there are already examples of earlier arrival and increased populations of some insect pests such as corn earworm.64 Furthermore, many of the most aggressive weeds, such as kudzu, benefit more than crop plants from higher atmospheric carbon dioxide, and become more resistant to herbicide control.72 Many weeds respond better than most cash crops to increasing carbon dioxide concentrations, particularly «invasive» weeds with the so - called C3 photosynthetic pathway, and with rapid and expansive growth patterns, including large allocations of below - ground biomass, such as roots.73 Research also suggests that glyphosate (for example, Roundup), the most widely - used herbicide in the United States, loses its efficacy on weeds grown at the increased carbon dioxide levels likely to occur in the coming decades.74 To date, all weed / crop competition studies where the photosynthetic pathway is the same for both species favor weed growth over crop growth as carbon dioxide is increased.72

The last time atmospheric carbon dioxide levels were this high, millions of years ago, the planet was very different.

Higher temperatures today are largely sustained by increased atmospheric concentrations of greenhouse gases, especially carbon dioxide.

Yesterday it was announced by the World Meteorological Organization (an arm of the United Nations), with front page coverage by the global media, that the atmospheric concentration of carbon dioxide (CO2) last year reached a new high value (396 parts per million, ppm) and got there in record time (2.9 ppm / yr).

Climate scientists know that the planet is warming, and dangerously, as a consequence of ever higher carbon dioxide levels in the atmosphere thanks to changes humans have made to the planet's atmospheric chemistry — and they know it can get worse.

This visualization provides a high - resolution, three - dimensional view of global atmospheric carbon dioxide concentrations from September 1, 2014 to August 31, 2015.

For more than a century, climate scientists have known that higher levels of carbon dioxide in the atmosphere mean higher atmospheric temperatures.

While we don't know sea level rise in the 21st century, in the long run, sea level was 50 m higher at atmospheric CO2 level of 2x prehistoric (note: we're adding greenhouse gases in addition to carbon dioxide).

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.

The atmospheric concentration of carbon dioxide has increased by more than 30 % since the start of the industrial age and is higher now than at any time in at least the past 650,000 years.

During this period, a higher than normal levels of atmospheric carbon dioxide lead to hotter planet, and in response fossil evidence of shows that an early ancestor of the horse, Sifrhippus, shrunk to the size of a house cat.

Because of the combination of high absorption, a regional distribution roughly aligned with solar irradiance, and the capacity to form widespread atmospheric brown clouds in a mixture with other aerosols, emissions of black carbon are the second strongest contribution to current global warming, after carbon dioxide emissions.

Even if this hypothesis was at first founded upon assumptions for the absorption of carbon dioxide which are not strictly correct, it is still an open question whether an examination of the «protecting» influence of the higher atmospheric layers upon lower ones may not show that a decrease of the carbon dioxide will have important consequences, owing to the resulting decrease in the radiation of the upper layers and the increased temperature gradient at the earth's surface.

Measured atmospheric concentrations of carbon dioxide are currently 100 ppm higher than pre-industrial levels.

From record - high temperatures to atmospheric concentrations of carbon dioxide not seen in a million years or more to a landmark international agreement to limit global warming, no other year has seen such a stark contrast of climate indicators.

If you write that the atmospheric concentration of carbon dioxide is «widely accepted as being about 350 parts per million», and walk away, it doesn't do much good for me to answer that it is known with high confidence to be between 385 and 390 parts per million (in 2009, on a global annual average).

Data clearly point to a high risk in the Southwest and Great Plains, as we continue to add carbon dioxide into our atmosphere,» Toby Ault, associate professor of earth and atmospheric sciences at Cornell University, said.