Sentences with phrase «change in carbon dioxide»

Over this period, changes in temperature did drive changes in carbon dioxide (CO2).

Researchers say even small changes in carbon dioxide levels right now could prevent this from happening.

Of particular interest, changes in carbon dioxide fail to explain the greatest proportion of these ancient temperatures.

One of the central tasks of climate science is to predict the sensitivity of climate to changes in carbon dioxide concentration.

Writing Task The Lesson Level Learning Goal for this task is: Construct and present an oral and written argument supported by empirical evidence and scientific reasoning to support the claim that activities such as deforestation or reforestation can cause changes in the carbon dioxide in the atmosphere.

«We estimate that the amount of carbon sequestered in the growing forests was about 10 to 50 percent of the total carbon that would have needed to come out of the atmosphere and oceans at that time to account for the observed changes in carbon dioxide concentrations,» said Nevle, a visiting scholar in the Department of Geological and Environmental Sciences at Stanford.

The observed change in carbon dioxide amplitude is larger than that simulated by models used by the Intergovernmental Panel on Climate Change (IPCC).

When there is evidence for the growth of a large ice sheet on Antarctica or on Greenland or the growth of sea ice in the Arctic Ocean, we see evidence for a dramatic change in carbon dioxide levels over the last 20 million years.

Percentage change in carbon dioxide emissions since 1990 (left) and 2005 (right), in the US, UK and Germany.

Waiting with bated breath: Opportunistic orientation to human odor in the malaria mosquito, Anopheles gambiae, is modulated by minute changes in carbon dioxide concentration.

«We argue that it was the establishment of the modern deep ocean circulation — the ocean conveyor — about 2.7 million years ago, and not a major change in carbon dioxide concentration in the atmosphere that triggered an expansion of the ice sheets in the northern hemisphere,» says Stella Woodard, lead author and a post-doctoral researcher in the Department of Marine and Coastal Sciences.

A new study shows how this climate system responds to various pressures, such as changes in carbon dioxide and ice cover, in one of the best models used to project future climate change.

A recent trend in GCMs is to extend them to become Earth system models, that include such things as submodels for atmospheric chemistry or a carbon cycle model to better predict changes in carbon dioxide concentrations resulting from changes in emissions.

As MGS skimmed the planet from pole to pole, it tracked changes in carbon dioxide ice deposits near the south pole of Mars.

Evans said they expect to see seasonal changes in carbon dioxide, related to temperature; changes related to freshwater sources, such as glacier melt and stream outfalls; and changes connected to areas of large development.

A simple top - down analysis, based on global scale changes in carbon dioxide and methane, provides some insight into the potential impact of U.S. shale gas production and displacement of coal on global climate.

There is no net change in carbon dioxide.

Researchers believe such dramatic changes in the carbon dioxide system in surface waters have not been observed for more than 20 million years of Earth history.

Rather, the ice core record shows clearly that changes in temperature precede changes in carbon dioxide throughout the glacial - interglacial cycle (Mudelsee, 2001), and that for the last half million years the climate system has oscillated in a self - limiting way between glacials and interglacials by about 6 deg.

We know that the climate is far too complex to pretend to «stabilize» through marginal changes in carbon dioxide (CO2) emissions.

And we don't have to go back all that far to get changes in carbon dioxide in the atmosphere and quite unknowable albedo effects.

This is a change in flux in response to an instantaneous change in carbon dioxide but after the stratosphere has responded to that change by cooling (panel b in fig. 2) assuming that the system was in equilibrium prior to the doubling of carbon dioxide.

And «our work indicates that moderate changes in carbon dioxide levels of 100 to 200 parts per million were associated with major climate transitions and large changes in temperature» — indicative of a very sensitive climate.

«We're learning a lot of new things from it about how sensitive the earth's system, and particularly the Arctic, is to really small changes in carbon dioxide and other parameters,» Brigham - Grette said.

Yes the correlation is strong, but it is from lagging temperatures 800 years (i.e., temperatures changes occured 800 years prior to changes in carbon dioxide emissions).

«We estimate that the amount of carbon sequestered in the growing forests was about 10 to 50 percent of the total carbon that would have needed to come out of the atmosphere and oceans at that time to account for the observed changes in carbon dioxide concentrations,» said Richard Nevle, visiting scholar in the Department of Geological and Environmental Sciences at Stanford.

Myth 1 — Ice core records show that changes in temperature drive changes in carbon dioxide, and it is not carbon dioxide that is driving the current warming

He said that «changes in the carbon dioxide level [of the atmosphere] are a result of changes in temperature, not a cause.»

Changes in carbon dioxide levels may make it easier for new plants to take over the landscape, such as more shrubs growing in the Arctic.

Although plant activity can increase with warmer temperatures and higher carbon dioxideconcentrations, the change in carbon dioxide amplitude over the last 50 years is larger than expected from these effects.

«A warm climate is more sensitive to changes in carbon dioxide.»

Stated another way, since the cloud coverage is in some sense a feedback from the warming due to carbon dioxide, wouldn't a change in carbon dioxide also lead to an incorrect change in the feedback of cloud formation?

-LSB-...] The Earth's temperature is therefore relatively insensitive to changes in carbon dioxide concentrations, a doubling leading to a dF of only 4.4 W / m2.»

One of the central tasks of climate science is to predict the sensitivity of climate to changes in carbon dioxide concentration.

He uses a method that is clearly intended to examine the long - term response of temperature to changes in carbon dioxide, and which is never used by the IPCC (nor should it be) to make predictions about current temperature trends.

I agree that a main problem with proposing «other» or «natural» causes for the variations that have been observed is that there is absolutely no support out there to suggest that «natural» changes can explain the observed temperature trends UNLESS you include the greenhouse effect from the changes in carbon dioxide in the atmosphere.

Changes in carbon dioxide levels may not have a direct impact, but related «feedback

«Such a change in the carbon dioxide level might, therefore, produce major consequences on the climate — possibly even triggering catastrophic effects such as have occurred from time to time in the past,» Hornig said.

The first of these concerns the terrestrial and oceanic processes that release greenhouse gases into the atmosphere and then absorb them, and the second is a calculation about what a change in carbon dioxide levels really means for average global temperatures.