Sentences with phrase «higher concentrations of carbon»

What had not been studied before was how climate change, in concert with higher concentrations of carbon dioxide, would affect ocean chemistry and biology.

Although higher concentrations of carbon dioxide reduce the pH of the ocean to some degree, it still remains slightly alkaline; pH values range from 8.2 (in the Norwegian Sea of the North Atlantic) to 7.9 (in the Eastern Pacific and Arabian Sea)[Doney 2006].

Faster plant growth due to higher concentrations of carbon dioxide may offset increased emissions from forest die - off in the tropics, asserts a new study based on climate modeling.

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.

However, while some species have continued to exhibit elevating rates of flower activity in response to higher concentrations of carbon dioxide, others, like certain canopy trees and lianas, have shown more stabilized flowering in recent years.

Three years later, Matthew Rillig, an ecologist at the Carnegie Institution of Washington, decided to see whether soil exposed to higher concentrations of carbon dioxide would have more glomalin and, as a result, more clumps.

The increased production in these crops is driven by higher precipitation predicted to occur in the central U.S., combined with higher concentrations of carbon dioxide, which reduces a plant's water requirements.

Higher concentrations of carbon dioxide in the atmosphere equals less vital nutrients in crops like rice and soybeans

New research shows that hotter weather coupled with higher concentrations of carbon dioxide in the air prompt flowering plants to produce pollen that is far more noxious than pollen of the past.

Because this meteorite has high concentrations of carbon manifested as diamond and graphite, Almahata Sitta is a type of meteorite called a ureilite.

«A higher concentration of carbon dioxide in our atmosphere would aid photosynthesis, which in turn contributes to increased plant growth,» Rep. Lamar Smith (R — Texas) wrote in an op - ed last year.

That deep water is not only rich in nutrients, it also has relatively high concentrations of carbon dioxide, both because it is cold (cold water can absorb and hold more carbon dioxide than warm water) and because the decomposition of organic matter that sinks into the depths releases carbon dioxide.

Pink salmon that begin life in freshwater with high concentrations of carbon dioxide, which causes acidification, are smaller and may be less likely to survive, according to a new study from UBC.

Regions where the sea naturally contains very high concentrations of carbon dioxide serve as «windows to the future.»

A higher concentration of carbon dioxide together with warmer temperatures = better plant growth?

Not exact matches

The Chevron cleaners contain a high concentration of PEA, which is known for its ability to dissolve tough carbon deposits.

The proportion of diesel vehicles registered in Leipzig however rose from 19 to 26 % between 2010 and 2016 — with negative consequences: While black carbon and the number concentration of ultrafine particles decreased, the concentration of gaseous nitrogen oxides (NOx) is stagnant and is still too high.

Part of the problem is that the benefits of better plant growth, thanks to higher carbon dioxide concentrations (plants use CO2 for photosynthesis) are more than offset by the impact of higher temperatures and differing precipitation.

Sediment cores show that in the past, higher iron concentrations in the equatorial Pacific did not enhance growth of carbon - storing algae

Five cultures each were kept under control conditions (15 °C) and at elevated water temperature (26 °C) in combination with three different concentrations of carbon dioxide (CO2): a control value with today's conditions, the conditions of the Intergovernmental Panel on Climate Change's «worst case scenario» and the highest possible degree of acidification.

Matyas Ripszam has also examined the effects of higher temperature and different concentration of organic carbon content on the distribution of pollutants in modelled real - life marine ecosystems, so called mesocosms.

When carbon dioxide dissolves in seawater, it forms carbonic acid, and in high enough concentrations carbonic acid is corrosive to the shells and skeletons of many marine organisms.

«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.»

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

Although the concentration of carbon dioxide in the atmosphere is much higher, at around 385 parts per million, methane is a worry as it is much better than carbon dioxide at locking in heat from solar radiation.

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.

Pere Masqué, also co-author of the study, adds that, «in addition to nutrients, SGD can play a crucial role as a source of other dissolved compounds flowing into the Mediterranean Sea, as well as in all the oceans worldwide, such as carbon, iron and other micronutrients, given the magnitude of the calculated fluxes and the high concentration of these compounds in groundwater.»

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

Lead author of the study, Sabrina Wenzel of DLR explains: «the carbon dioxide concentrations measured for many decades on Hawaii and in Alaska show characteristic cycles, with lower values in the summer when strong photosynthesis causes plants to absorb CO2, and higher - values in the winter when photosynthesis stops.

«We could see that the concentration of carbon dioxide and solar radiation was higher during the cold period between the two warm periods compared with the cold period before the first warming 15,000 years ago.

For the study, five cultures were kept under a constant temperature and three different concentrations of carbon dioxide (CO2): a control value with today's conditions, the conditions that could be reached until the end of this century according to the most critical calculations of the Intergovernmental Panel on Climate Change (IPCC), and the highest possible degree of acidification.

Researchers at the University of Gothenburg have now revealed that the concentration of nitrogen in plants» tissue is lower in air with high levels of carbon dioxide, regardless of whether or not the plants» growth is stimulated.

Being part of the mining area Herrerias in Andalusia, deep waters of Pit Lake Guadiana show extremely high concentration of dissolved carbon dioxide (CO2).

The models showed that thinner carbon nanotubes with a relatively high concentration of nitrogen would perform best, as oxygen atoms readily bond to the carbon atom nearest the nitrogen.

«The health hazards associated with high contaminant concentrations can therefore be avoided while at the same time reducing energy consumption in buildings by about fifty percent, which is highly significant in terms of existing carbon emission targets,» says Schütze.

Or efforts to offset warming by injecting carbon dioxide into underground rocks could make aquifers more acidic, increasing their ability to leach dangerous metals out of rocks, and leading to higher concentrations of these metals in springs and rivers.

Higher carbon dioxide levels change the concentration of ions (electrically charged atoms and molecules) in the fishes» blood, altering the way that the neuroreceptors work.

Geoengineering methods that don't remove carbon dioxide from the atmosphere don't undo the other effects of high atmosphere carbon - dioxide concentrations such as ocean acidification, and our ability to adequately control geoengineering with sunlight - reflecting particles is not certain.

This is expected to have a cooling effect on surface temperatures, which would offset the warming effect of high carbon dioxide concentrations.

It has been known that high levels of carbon dioxide in the air causes health and environmental hazards, but a new study shows that high concentration of Carbon dioxide might actually be helping plant cycles, resulting to a greener earth.

Based on accumulating measurements of microbes in the subglacial environment, he calculates that the concentration of cell and organic carbon in the Earth's ice sheets, or «cryosphere», may be hundreds of times higher than what is found in all the planet's freshwater systems.

Palm trees grew on the North Slope of Alaska and carbon dioxide levels were 3 to 12 times higher than today's concentrations.

One of the strategies of CCS is to directly inject a high dissolved inorganic carbon (DIC) concentration (or high partial pressure of carbon dioxide, pCO2) solution into the ocean.

Relative growth rates, carbon, nitrogen, and the C: N ratio in tissue samples were influenced by higher concentrations of NH 4 +.

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.

The metabolic effects of a ketogenic diet imply a higher - than - usual oxidation of fats, which leads in turn to reduced respiratory exchange ratio values.20, 97 Metabolic carbon dioxide output may be calculated as the product of alveolar ventilation multiplied by the fractional alveolar carbon dioxide concentration.

Greenhouse gases (which prevent dispersal of heat generated by the planet's surface, after this receiving solar radiation) of higher concentration on Earth are carbon dioxide (CO2), methane (CH 4), nitrous oxide (N2O), Compounds of chlorofluorocarbon (CFC) and water vapor (H2O).

Student scores on concentration tests were low in classrooms with high rates of carbon dioxide.

The combination of insolation at high latitude, solar irradiance, cloud cover, and carbon dixoide concentrations all combine to influence glacial cycles.

By 2100, the ocean uptake rate of 5 Gt C yr - 1 is balanced by the terrestrial carbon source, and atmospheric CO2 concentrations are 250 p.p.m.v. higher in our fully coupled simulation than in uncoupled carbon models2, resulting in a global - mean warming of 5.5 K, as compared to 4 K without the carbon - cycle feedback.