Sentences with phrase «raising atmospheric carbon»

Volcanoes Individual eruptions can cool temperatures by blocking solar energy with their debris, but repeated or extensive eruptions can warm temperatures by raising atmospheric carbon dioxide.

Individual eruptions can cool temperatures by blocking solar energy with their debris, but repeated or extensive eruptions can warm temperatures by raising atmospheric carbon dioxide.

At a June 2006 Symposium, Dr. Katey Walter said, «The rapid thaw of permafrost can release this carbon nearly instantaneously, raising atmospheric carbon concentrations.»

By emitting billions of tonnes of carbon dioxide into the atmosphere, we've raised atmospheric carbon dioxide to levels not seen in millions of years.

Without any warming, even a huge emission of 1000 GT would not raise atmospheric carbon all that much.

Not exact matches

Posting 87 includes «The roughly 500 billion metric tons of carbon we have produced is enough to have raised the atmospheric concentration of CO2 to nearly 500 ppm.»

The more correct statement is that the planet has never before seen atmospheric carbon raise so much, so quickly, without a mass extinction event.

There is a theory that the rising of the Himalayas and the Tibetan plateau provided the barrier that made the South Asian monsoons possible, and a secondary theory that the increased rainfall on the freshly raised mountain slopes weathered so much rock that the planet's levels of atmospheric carbon dioxide took a dive, to precipitate 30 million years of Ice Ages.

The qualitative result that growth in bioenergy raises atmospheric CO2 does not depend on the parameters: as long as bioenergy generates an initial carbon debt, increasing harvests mean more is «borrowed» every year than is paid back.

And as to his claim that there may be «places around the world where global warming will lead to less crop success and yield, even when taking into account the carbon dioxide fertilization effect,» he appears to be equally ignorant that rising levels of atmospheric CO2 tend to raise the temperature of optimum plant photosynthesis beyond the predicted temperature values associated with global warming, effectively nullifying this worn out claim (Idso & Idso, 2011).

When Arrhenius came out with his theory in 1896 he calculated that doubling atmospheric carbon dioxide will raise global temperature by four - five degrees.

Although some researchers have raised concerns about possible negative effects of rising CO2 on ocean surface pH, there are several lines of evidence demonstrating marine ecosystems are far more sensitive to fluxes of carbon dioxide from ocean depths and the biosphere's response than from invasions of atmospheric CO2.

Scientists have calculated that, were the world ever to burn all its fossil fuels, thus increasing levels of atmospheric carbon dioxide and stoking up planetary temperatures, that would be enough to melt the entire Antarctic continent and raise sea levels by 60 metres.

The coincidence of the current plateau in global surface temperatures with the continuing rise in the atmospheric concentration of carbon dioxide has raised many questions about the climate models and their forecasts of serious anthropogenic global warming.

by Donald C. Morton The coincidence of the current plateau in global surface temperatures with the continuing rise in the atmospheric concentration of carbon dioxide has raised many questions about...

History is repeating itself today, but this time with the stakes raised as atmospheric concentrations of carbon dioxide have now exceeded 400 ppm.

Consider, for example, that Lowe, et al. [in Avoiding Dangerous Climate Change, H.J. Schellnhuber et al. (eds), Cambridge University Press, Cambridge, 2006, p. 32 - 33], based on a «pessimistic, but plausible, scenario in which atmospheric carbon dioxide concentrations were stabilised at four times pre-industrial levels,» estimated that a collapse of the Greenland Ice Sheet would over the next 1,000 years raise sea level by 2.3 meters (with a peak rate of 0.5 mm / yr).

Scheduled speakers include some of the nation's best - known global warming skeptics, including Anthony Watts, a television weatherman; Timothy Ball, a former University of Winnipeg professor who has been sued for libel by Michael Mann, a prominent mainstream climate scientist; and Alan Carlin, a former Environmental Protection Agency analyst who claims he was muzzled when he raised questions about the agency's finding that atmospheric carbon dioxide is a threat to human health and the environment.

«We are only able to state that the slowing in growth that we observed is consistent with the hypothesis that increases in temperature will cause decreases in tree growth,» explained Joseph Wright, a researcher at the Smithsonian Tropical Research Institute in Panama.If this trend persists, tropical forests will likely emit ever increasing amounts of carbon dioxide in the future — effectively raising atmospheric concentrations of greenhouse gases.