Sentences with phrase «given increase of greenhouse gases»

According to Tselioudis, representing this detail correctly in climate models is critical to determining how much warming will result from a given increase of greenhouse gases.

Not exact matches

Given the increasing demand for energy around the world and the dearth of international action to reduce greenhouse gas emissions, we may be headed for a true global disaster.

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.

While a strong El Niño has given global temperatures a boost, the bulk of that heat comes from the manmade global warming driven by increasing amounts of carbon dioxide and other greenhouse gases in the atmosphere.

«We know natural patterns contribute to global temperature in any given year, but the very warm temperatures so far this year indicate the continued impact of increasing greenhouse gases,» Stephen Belcher, the head of the Met Office's Hadley Center, said.

Given that the trend in global SSTs has been attributed to increases in greenhouse gases in the atmosphere (17 — 19), it follows that the best explanation for this ecosystem aberration is anthropogenic warming that has passed a threshold of natural variability.

This is the difference between countries» pledged commitments to reduce emissions of heat - trapping greenhouse gases after 2020 and scientifically calculated trajectories giving good odds of keeping global warming below the threshold for danger countries pledged to try to avoid in climate talks in 2010 (to «hold the increase in global average temperature below 2 °C above pre-industrial levels»).

Further to 12 and eric's response: I'm sorry if I wasn't clear enough: in the second sentence by Stefan that I quoted, «this» can only sensibly refer back to the whole of the first sentence, giving the reading That carbon dioxide and other greenhouse gases are increasing rapidly in the atmosphere due to human activity is a measured fact not even disputed by staunch «climate skeptics.

Here's a quote: «Given the projected 21st century rise in greenhouse gas concentrations and increased fresh water input to the high latitude ocean, we can not rule out a significant slowing of the Atlantic conveyor in the next 100 years.

At Jim Hansen's now famous congressional testimony given in the hot summer of 1988, he showed GISS model projections of continued global warming assuming further increases in human produced greenhouse gases.

The IPCC 2001 report states «Several recent reconstructions estimate that variations in solar irradiance give rise to a forcing at the Earth's surface of about 0.6 to 0.7 Wm - 2 since the Maunder Minimum and about half this over the 20th century... All reconstructions indicate that the direct effect of variations in solar forcing over the 20th century was about 20 to 25 % of the change in forcing due to increases in the well - mixed greenhouse gases.»

In the meantime, it gives clear insights into what scientists see happening to the planet's climate as human industrial activities, as well as land - use changes, pump increasing amounts of carbon dioxide and other greenhouse gases into the air.

Increasing greenhouse gasses have a direct effect on the probability distribution of surface temperatures at any given location.

In 2006, the European Union (EU), which consists of 27 members, committed to reducing its global warming emissions by at least 20 percent of 1990 levels by 2020, to consuming 20 percent of its energy from renewable sources by 2020, and to reducing its primary energy use by 20 percent from projected levels through increased energy efficiency.1 The EU has also committed to spending $ 375 billion a year to cut greenhouse gas emissions by at least 80 percent by 2050 compared to 1990 levels.2 The EU is meeting these goals through binding national commitments which vary depending on the unique situation of a given country but which average out to the overall targets.

The IPCC statement that most of the observed increase in global average temperature since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations» is very much dependent on what weighting was given to natural (mainly solar) forcing over this period.

They generally use correlations between the response of climate models to increasing greenhouse gas (GHG) concentrations and a quantity in principle observable in the present climate (e.g., an amplitude of natural fluctuations) to constrain ECS given measurements of the present - day observable.

For instance, US Senator James Imhofe of Kansas called climate change «the greatest hoax ever» (Johnson, 2011) To claim that climate change science is the greatest hoax ever is at minimum, if not a lie, reckless disregard for the truth given the number of prestigious scientific organizations that have publicly supported the consensus view, the undeniable science supporting the conclusion that if greenhouse gases increase in the atmosphere some warming should be expected, the clear link between rising greenhouse gas concentrations in the atmosphere and increases in fossil fuel use around the world, as well undeniable increases in warming being that have been experienced at the global scale.

The increased temperature results in increased emissions (to the 4th power of T) to tend restore the energetic balance — if ever an imbalance existed given the temperature that greenhouse gases are emitted at.

While what I have described is a bit simplistic, it gives the gist of why the CO2 emissions are significant: not only is CO2 a greenhouse gas, but its effect causes other significant changes to take place, such as increased uptake of water vapour into the atmosphere.

They do not know with precision how much a given quantity of emissions will lead to increased concentrations of greenhouse gases in the atmosphere.

While there have been negotiations under way on the new agreement, there has also been an attempt to increase national commitments on greenhouse gas (ghg) emissions reductions in the short - term because mainstream science is telling nations that much greater reductions in emissions are necessary in the next few years to maintain any hope of keeping warming below 20 C, a warming limit that all nations have agreed should not be exceeded to give some hope of preventing catastrophic warming.

CO2 is a greenhouse gas, and for a given increase in opacity the outgoing radiation to space will decrease at a given temperature (which has been observed in studies of radiant spectra).

Firstly, we know more about how rising temperatures will reduce the effectiveness of carbon sinks: the science now tells us that for any given level of emissions, concentrations of greenhouse gases (GHGs) and temperatures will increase by more than the RCEP report anticipated.

So, if we take what the best science gives us, we find that pretty close to half of the warming that is currently indicated by the extant global temperature datasets may be from influences other than anthropogenic greenhouse gas increases — perhaps a bit less, perhaps a bit more.

We will be able to give probabilistic estimates of the climate's transient sensitivity to greenhouse gas increases and will have an improved understanding of the response of sea ice, precipitation, and temperature extremes to warming.

The reason the air and water are warmer than they would be with no greenhouse gases (and thus have increased radiation both directions) is that the lapse rate combined with the high altitude of outgoing radiation to space gives a higher near surface temperature than otherwise.

As the «2 °C threshold» came to define the global climate effort, it became common to characterize any given emissions pathway or greenhouse gas budget by its probability of causing a temperature increase of 2 °C or more.

First, there is an increase of greenhouse gases from 1970 to 1996 that gives rise to recognizable bands in the observed spectrum.

While these uncertainties prevent the establishment of a high - confidence, one - to - one linkage between atmospheric greenhouse gas concentrations and global mean temperature increase, probabilistic analyses can assign a subjective probability of exceeding certain temperature thresholds for given emissions scenarios or concentration targets (e.g., Meinshausen, 2005; Harvey, 2007).

Increasing concentrations of greenhouse gases are expected to induce temperature decreases and a contraction of the upper atmosphere, resulting in a corresponding density decrease at a given height.

Climate model simulations are used to predict how much warming should be expected for any given increase in the atmospheric concentration of carbon dioxide and other greenhouse gases.

«Given our understanding of both the climate system as embodied in the current range of models, and the known forcings both natural and anthropogenic, it is very likely that not more than half of the observed increase in global average temperatures since the mid-20th century is due to causes other than the observed increase in anthropogenic greenhouse gas concentrations.»

Ahmedabad, India, leads the pack as cities in developing nations race ahead of their richer counterparts in adopting eco-friendly transit solutions, according to the Institute for Transportation and Development Policy (ITDP), which last week gave the western Indian city its 2010 Sustainable Transport Award.The award has been given out since 2005 to a city that best «uses transport innovations to increase mobility for all residents, while reducing transportation greenhouse [gas] and air pollution emissions and increasing cyclist and pedestrian safety and access.»