Sentences with phrase «greenhouse warming over»

Absence of evidence for greenhouse warming over the Arctic Ocean in the past 40 years.

A similar cooling trend was reported in the 1993 paper, «Absence of Evidence for Greenhouse Warming over the Arctic Ocean in the Past 40 years».

Absence of evidence for greenhouse warming over the Arctic Ocean in the past 40 years (by title and author only, with a quote)

Now, perhaps you can explain to us how you get 33 degrees of greenhouse warming over blackbody temperatures without significant contributions from positive feedback.

A very rough back of the envelope calculation suggest that energy required to melt that ice is equivalent to 1 - 2 % of the additional energy due to greenhouse warming over the same period.

A large enough number of such roofs could «completely offset warming due to urban expansion and even offset a percentage of future greenhouse warming over large regional scales,» says sustainability scientist Matei Georgescu at Arizona State University, who lead the research.

Not exact matches

China's push to become a major maker of solar panels has driven down global prices by close to 90 percent over the past decade, helping international efforts to curb emissions of planet - warming greenhouse gases.

Global warming is like a tea kettle (the earth) over a flame (greenhouse gasses plus short - lived pollutants) on your stove.

We can't say how much Earth will warm over the coming years unless we know how much more greenhouse gas will end up in the atmosphere

For a start, observational records are now roughly five years longer, and the global temperature increase over this period has been largely consistent with IPCC projections of greenhouse gas — driven warming made in previous reports dating back to 1990.

Greenhouse gases add those watts by acting as a blanket, trapping the sun's heat; they have warmed Earth by roughly 0.75 degree Celsius over the last century.

The researchers detected a «significant regional flux» of methane, a greenhouse gas with about 30 times the warming potential of carbon dioxide over a 100 - year period, coming from an area of gas wells in southwestern Pennsylvania.

In an about - face, the agency agreed that global warming is happening; that humans, by pumping greenhouse gases into the atmosphere, are responsible; and that the American environment is likely to change dramatically over the next century.

But when unburned methane is released into the atmosphere, it is a potent greenhouse gas with a warming potential 28 to 34 times greater than carbon dioxide over a 100 - year timeframe (and up to 84 times more potent over a 20 year timeframe).

Jacobson said the sum of warming caused by all anthropogenic greenhouse gases — CO2, methane, nitrous oxide, chlorofluorocarbons and some others — plus the warming caused by black and brown carbon will yield a planetary warming effect of 2 degrees Celsius over the 20 - year period simulated by the computer.

Previous research has shown the tropical Pacific has warmed over the past century due to increased greenhouse gas emissions.

It says nations will have to impose drastic curbs on their still rising greenhouse gas emissions to keep a promise made by almost 200 countries in 2010 to limit global warming to less than 2 degrees Celsius (3.6 Fahrenheit) over pre-industrial times.

This is unacceptable at a time when leading scientists from all over the world are warning that greenhouse gases must be cut by at least 60 percent over the next half a century to avert the worst consequences of global warming.

In my view, the most important omission related directly to science and technology aspects of the greenhouse gas issue is the failure to point out the tremendous opportunity that exists to limit warming over the next few decades by imposing strong, mandatory controls of short - lived warming agents (so methane, black carbon, and tropospheric ozone).

Although the earth has experienced exceptional warming over the past century, to estimate how much more will occur we need to know how temperature will respond to the ongoing human - caused rise in atmospheric greenhouse gases, primarily carbon dioxide.

It turns out Earth will warm more slowly over this century than we thought it would, buying us a little more time to cut greenhouse gas emissions.

A few of the main points of the third assessment report issued in 2001 include: An increasing body of observations gives a collective picture of a warming world and other changes in the climate system; emissions of greenhouse gases and aerosols due to human activities continue to alter the atmosphere in ways that are expected to affect the climate; confidence in the ability of models to project future climate has increased; and there is new and stronger evidence that most of the warming observed over the last 50 years is attributable to human activities.

Rather than using complex computer models to estimate the effects of greenhouse - gas emissions, Lovejoy examines historical data to assess the competing hypothesis: that warming over the past century is due to natural long - term variations in temperature.

The 700 - degree Fahrenheit (370 - degree Celsius) fumes left over contain at least 30,000 parts per million of carbon dioxide (CO2)-- the primary greenhouse gas responsible for global warming — along with other pollutants.

Scientists can confidently say that Earth is warming due to greenhouse gas emissions caused by humans, but data on climate trends over the Antarctic and the surrounding Southern Ocean only go back to 1979 when regular satellite observations began.

As the region warms due to increased greenhouse - gas emissions, ice melts, reducing Antarctica's elevation over centuries or thousands of years.

In fact, even if the world does cool over the next few years as some predict, it in no way undermines the certainty about long - term warming due to greenhouse gas emissions.

It suggests that Earth will warm more slowly over this century than we thought it would, buying us a little more time to cut our greenhouse gas emissions and prevent dangerous climate change.

Understanding how carbon flows between land, air and water is key to predicting how much greenhouse gas emissions the earth, atmosphere and ocean can tolerate over a given time period to keep global warming and climate change at thresholds considered tolerable.

BOULDER — Drastic, economy - changing cuts to greenhouse gas emissions will spare the planet half the trauma expected over the next century as the Earth warms.

The effects of wind changes, which were found to potentially increase temperatures in the Southern Ocean between 660 feet and 2,300 feet below the surface by 2 °C, or nearly 3.6 °F, are over and above the ocean warming that's being caused by the heat - trapping effects of greenhouse gases.

The key conclusions were that: It is «unequivocal» that global warming is occurring; the probability that this is caused by natural climatic processes is less than 5 %; and the probability that this is caused by human emissions of greenhouse gases is over 90 %.

Stable atmospheric concentrations of greenhouse gases would lead to continued warming, but if carbon dioxide emissions could be eliminated entirely, temperatures would quickly stabilize or even decrease over time.

The letter notes that «Stable atmospheric concentrations of greenhouse gases would lead to continued warming, but if carbon dioxide emissions could be eliminated entirely, temperatures would quickly stabilize or even decrease over time.

To have any hope of slowing the pace and holding down the upper level temperatures that global warming will bring over this century, the human population of the world will need to make large reductions of the additional billions of tons of greenhouse gases they are projected to be pumping into the atmosphere, each year.

Warming fueled by greenhouse gas emissions continues to rewrite the record books: Over the past several weeks, heat records continued to fall at global, national, and local scales.

Upper ocean temperatures have warmed significantly in most regions of the world over recent decades, with anthropogenic greenhouse gas forcing very likely being the main contributor21.

This continues the trend of warming winters over the past few decades as the climate warms from increasing greenhouse gases, with the eastern two - thirds of the country warming the most during the winter.

The observed fact that temperatures increases slower over the oceans than over land demonstrates that the large heat capacity of the ocean tries to hold back the warming of the air over the ocean and produces a delay at the surface but nevertheless the atmosphere responds quit rapidly to increasing greenhouse gases.

Our general circulation model simulations, which take into account the recently observed widespread occurrence of vertically extended atmospheric brown clouds over the Indian Ocean and Asia3, suggest that atmospheric brown clouds contribute as much as the recent increase in anthropogenic greenhouse gases to regional lower atmospheric warming trends.

The basic fact that rising concentrations of greenhouse gases result in global warming has been understood since it was predicted from physical laws over a century ago; specification of the magnitude and geographical distribution of the warming are elucidated by the twentieth century observations and calculations.

While there is still plenty of work to be done on the implications, the scientific debate over whether rising greenhouse gas levels are the principal cause of this warming has effectively been dead for years, despite the heroic efforts of some sections of the media to keep it on life - support.»

The abstract includes the statement: «Evidence is presented that the recent worldwide land warming has occurred largely in response to a worldwide warming of the oceans rather than as a direct response to increasing greenhouse gases (GHGs) over land.»

Scientists have modelled the expected temperature drop over the 21st century due to waning solar activity — and they found that the change is likely to be dwarfed by the much bigger warming effect of greenhouse gases in the atmosphere.

CO 2 equivalents: The GWP value (Global Warming Potential) of a gas is defined as the cumulative impact on the greenhouse effect of 1 tonne of the gas compared with that of 1 tonne of CO 2 over a specified period of time.

«This study confirms that, even when using different approaches, the observed warming seen over the last 50 years is dominated by man - made emissions of greenhouse gases.

But over the long term, as the planet continues to warm from the increase in greenhouse gases, extended streaks of heat are

This single - year snapshot of the planet's warmth fits with the pattern of ever - warmer temperatures that has been in place over the past century, particularly since the early 1980s as the warming fueled by an accumulation of greenhouse gases clearly emerged.

According to the U.S. Environmental Protection Agency, the greenhouse gas methane is highly efficient at trapping heat in the atmosphere and a significant contributor to global warming, over 80 times more potent than carbon dioxide.

Contemporary global mean sea level rise will continue over many centuries as a consequence of anthropogenic climate warming, with the detailed pace and final amount of rise depending substantially on future greenhouse gas emissions.