Sentences with phrase «in atmospheric carbon»

The anthropogenic increase in atmospheric carbon dioxide concentration is reducing the pH of the oceans.

The likely disasters are most likely to be caused by the «environmentalists» and their allies, not by alleged increases in atmospheric carbon dioxide levels caused by human activities.

The continued rise in atmospheric carbon dioxide concentrations has been shown to fuel photosynthesis (and thus growth and reproductive success) in some plants.

The team says these factors combined to cause a sudden drop in atmospheric carbon dioxide, which would have cooled the planet sufficiently to cause the ice age.

Your third concern, that there is no acceleration in the atmospheric carbon dioxide concentration in response to accelerated emissions does not seem to me to be correct.

An observed long - term increase in the number of these clouds may be due in part to the rise in atmospheric carbon dioxide levels, he says.

It's worth noting that the atmosphere only takes a couple of months to heat up or cool down in response to changes in atmospheric carbon dioxide.

This is no small task, for the annual increase in atmospheric carbon dioxide alone is of the order of three billion tonnes.

These episodes were the first times that the Amazon was documented to have lost its ability to take in atmospheric carbon on a net basis.

From CSIRO: «What we learned is that in spite of droughts, floods, volcano eruptions, El Niño and other events, the Earth system has been remarkably consistent in regulating the inter-annual variations in atmospheric carbon dioxide levels,» Tropical ecosystems regulate variations in Earth's carbon dioxide levels Rising temperatures, influenced by natural events such as El Niño,...

But there was a very important difference between then and now: the rate of fluctuations in atmospheric carbon dioxide levels in the past appeared in many cases to have been at a snail's pace compared to recent increases - and today's levels continue to go up exponentially - faster and faster and faster.

We provide corporations that are seeking to reduce their carbon footprint with the business case to engage in environmental sustainability projects that produce reductions in atmospheric carbon, along with water - borne nitrogen and phosphorous.

Environmentalists, many of whom believe that the term «clean coal» is an oxymoron, nonetheless view the project's cancellation as yet another indication that the Bush administration lacks the commitment required to reduce the rate of growth in atmospheric carbon dioxide emissions.

The «A1B» scenario assumes that 50 % of energy over the next century will come from fossil fuels, resulting in atmospheric carbon dioxide concentrations causing drastic climatic consequences.

Initial SAM results show an increase of 5 percent in heavier isotopes of carbon in the atmospheric carbon dioxide compared to estimates of the isotopic ratios present when Mars formed.

But even Genghis Khan couldn't create more than a blip in atmospheric carbon compared to the overwhelming effect of agriculture.

Researchers believe that the last ice age, which began 40 million years ago, was kicked off by the rise of the Himalayas during the collision of tectonic plates and a corresponding plunge in atmospheric carbon dioxide.

Dr. Houghton and colleagues conclude that the greater certainty in atmospheric carbon measurements has led to an increased certainty in the calculated rate of carbon uptake by land and oceans.

By the University of Southampton A decline in atmospheric carbon dioxide (CO2) levels led to a fundamental shift in the behaviour of the Earth's climate system around one million years ago, according to new research led by the University of Southampton.

That may mean that natural factors, such as changes in solar radiation, played a larger role in atmospheric carbon dioxide than reforestation during this time, Pongratz said.

«These events don't begin until at least a century after carbon dioxide in the atmosphere began to decline and the ratio of heavy to light carbon isotopes in atmospheric carbon dioxide begins to increase.»

Last year's powerful El Niño left meteorologists expecting a major surge in atmospheric carbon dioxide emissions.

Even in the unlikely event that we were to stop all emissions in the near future, this permafrost climate feedback would likely continue as a self - sustaining process, cancelling out any future natural draw - down in atmospheric carbon dioxide levels by the oceans or vegetation.

This is reflected in the relentless increase in atmospheric carbon measured by the Mana Loa laboratory in Hawaii, now above 400 parts per million and rising from the pre-industrial level of below 300 part per million.

The lawsuit is thorough in its demands: Plaintiffs want the government to stop permitting and subsidizing carbon energy; to phase out carbon emissions as soon as possible; to seek a drawdown in atmospheric carbon to 350 parts - per - million by the close of the century; and to enact a countrywide plan that will stabilize the climate system.

In fall and winter, the decay of land plants returns that CO2 to the air, all part of a notable annual cycle in atmospheric carbon dioxide concentration:

Now their claiming that converting the UK to organic agriculture could result in massive cuts in atmospheric carbon.

Shouldn't you at least take a look at forcing those models with plausible shifts in atmospheric carbon (not only in CO2, but also in black carbon from fires) due to a human population crash and associated reforestation?

By dividing the total temperature change (as indicated by the best - fit linear trend) by the observed rise in atmospheric carbon dioxide content, and then applying that relationship to a doubling of the carbon dioxide content, Loehle arrives at an estimate of the earth's transient climate sensitivity — transient, in the sense that at the time of CO2 doubling, the earth has yet to reach a state of equilibrium and some warming is still to come.

Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation, Proceedings of the National Academy of Sciences, 113 (13), p. 3465 - 3470.

Back in 2005, and again in 2010, the vast Amazon rainforest, which has been aptly described as the world's lungs, briefly lost its ability to take in atmospheric carbon dioxide.

The purpose of the teleconference was to increase knowledge among scientists and students of the observed increases in atmospheric carbon dioxide in recent decades, and especially to stimulate young scientists to undertake research on carbon dioxide - related problems.

Research published last year by Professors Cox and Friedlingstein showed that these variations in atmospheric carbon dioxide can reveal the sensitivity of tropical ecosystems to future climate change.

Today the difference is 28 degrees Celsius, indicating that polar regions are more sensitive to increases in atmospheric carbon dioxide than the tropics.

Most notably, the models do not generally react too sensitively to increases in atmospheric carbon dioxide.

In particular, the authors» analysis refutes the claim that the models react too sensitively to increases in atmospheric carbon dioxide: «If excessive sensitivity of the models caused the models to calculate too great a temperature trend over the past 15 years, the models that assume a high sensitivity would calculate a greater temperature trend than the others,» Piers Forster explains.

His data, published in 1938, showed a temperature rise that correlated with a rise in atmospheric carbon dioxide.

And though it's hard to say for sure how climate change has contributed to recent, destructive hurricanes, there's no doubt that increases in atmospheric carbon dioxide, thanks largely to human activities, are altering our planet and threatening our futures.