Sentences with phrase «major change in carbon dioxide»

«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.

Not exact matches

«In the end, a failure to plan adequately for climate change by taking the full cost of carbon dioxide emissions into account will prove far more costly,» said Missirian, a fourth - year sustainable development major.

Second, genetic evidence shows a change in Methanosarcina at that time, allowing it to become a major producer of methane from an accumulation of carbon dioxide in the water.

The team studied storm development from the Pliocene era, roughly three million years ago, and chose that time period because it was the last time the Earth had as much carbon dioxide as it does now, and the changes in climate from it can play a major role in storm formation and intensity.

The study argued that changes in the sun's radiation output played a major role in influencing shifts in Arctic air temperatures — a view at odds with mainstream climate science, which fingered atmospheric carbon dioxide as a bigger player.

In Berlin this March, the signatories to the Climate Change Convention will hear renewed calls from their science advisers for major cuts in emissions of carbon dioxide to stave off climate changIn Berlin this March, the signatories to the Climate Change Convention will hear renewed calls from their science advisers for major cuts in emissions of carbon dioxide to stave off climate cChange Convention will hear renewed calls from their science advisers for major cuts in emissions of carbon dioxide to stave off climate changin emissions of carbon dioxide to stave off climate changechange.

Reasoning that, because it fluctuated daily, water vapour was continually recycling itself in and out of the atmosphere, he turned his attention to carbon dioxide, a gas resident for a long time in the atmosphere whose concentration was only (at that time) dramatically changed by major sources such as volcanoes or major drawdowns such as unusual and massive episodes of mineral weathering or the evolution of photosynthetic plants: events that occur on very long, geological timescales.

, makes it crystal clear, in quantified terms, that the emissions of carbon dioxide from burning coal are a major part of the problem and need to be addressed if we are to make the necessary changes to address global warming.

«I am posting this information in advance of publication because of its potential importance to pending EPA regulations or congressional legislation which assume that carbon dioxide is a major driver of climate change.

In a collection of four strategy documents which together proclaim themselves «the most systematic response to climate change of any major developed country», the UK government plots out exactly how it plans to meet its legally binding targets for cutting carbon dioxide emissions.

9/19/16 — Taxing carbon released from burning fossil fuels could be a key part of a comprehensive effort to reduce emissions of carbon dioxide, a major contributor to human - caused climate change, two economists have argued in Issues.

«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.

Indeed, strong observational evidence and results from modeling studies indicate that, at least over the last 50 years, human activities are a major contributor to climate change.Direct human impact is through changes in the concentration of certain trace gases such as carbon dioxide, chlorofluorocarbons, methane, nitrous oxide, ozone, and water vapor, known collectively as greenhouse gases.

16 Scientists that think that an increase in carbon dioxide is a major factor in global warming Until the late 1800s carbon dioxide in the atmosphere remained about the same Measured carbon dioxide levels in bubbles trapped in Antarctic ice CHANGING LEVELS OF CARBON Dcarbon dioxide is a major factor in global warming Until the late 1800s carbon dioxide in the atmosphere remained about the same Measured carbon dioxide levels in bubbles trapped in Antarctic ice CHANGING LEVELS OF CARBON dioxide is a major factor in global warming Until the late 1800s carbon dioxide in the atmosphere remained about the same Measured carbon dioxide levels in bubbles trapped in Antarctic ice CHANGING LEVELS OF CARBON Dcarbon dioxide in the atmosphere remained about the same Measured carbon dioxide levels in bubbles trapped in Antarctic ice CHANGING LEVELS OF CARBON dioxide in the atmosphere remained about the same Measured carbon dioxide levels in bubbles trapped in Antarctic ice CHANGING LEVELS OF CARBON Dcarbon dioxide levels in bubbles trapped in Antarctic ice CHANGING LEVELS OF CARBON dioxide levels in bubbles trapped in Antarctic ice CHANGING LEVELS OF CARBON DCARBON DIOXIDEDIOXIDE

Increases in carbon dioxide and other greenhouse gases have almost certainly played a major role in the observed temperature increases of the 20th Century, according to the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report.

Phytoplankton play a major role in removing carbon dioxide from the atmosphere worldwide, and studying how they grow, including their nitrogen sources, helps scientists better understand their possible responses to climate change.

Simply changing the carbon dioxide content of the atmosphere by 30 percent has major impacts in the adiabatic lapse rate and the rate at which radiated heat is passed from the planet.

Below is one of the «Key Findings» from the report Global Climate Change Impacts in the United States produced by the U.S. Climate Change Global Change Research Program (USGCRP), which was used as a major support for the U.S. Environmental Protections Agency's «Endangerment Finding» that human carbon dioxide emissions are a threat to health and welfare.

E.g., research assumes greenhouse gas emissions cause warming without explicitly stating humans are the cause»... carbon sequestration in soil is important for mitigating global climate change» (4a) No position Does not address or mention the cause of global warming (4b) Uncertain Expresses position that human's role on recent global warming is uncertain / undefined «While the extent of human - induced global warming is inconclusive...» (5) Implicit rejection Implies humans have had a minimal impact on global warming without saying so explicitly E.g., proposing a natural mechanism is the main cause of global warming»... anywhere from a major portion to all of the warming of the 20th century could plausibly result from natural causes according to these results» (6) Explicit rejection without quantification Explicitly minimizes or rejects that humans are causing global warming»... the global temperature record provides little support for the catastrophic view of the greenhouse effect» (7) Explicit rejection with quantification Explicitly states that humans are causing less than half of global warming «The human contribution to the CO2 content in the atmosphere and the increase in temperature is negligible in comparison with other sources of carbon dioxide emission»»

Reasoning that, because it fluctuated daily, water vapour was continually recycling itself in and out of the atmosphere, he turned his attention to carbon dioxide, a gas resident for a long time in the atmosphere whose concentration was only (at that time) dramatically changed by major sources such as volcanoes or major drawdowns such as unusual and massive episodes of mineral weathering or the evolution of photosynthetic plants: events that occur on very long, geological timescales.