Sentences with phrase «gases change the concentrations»

Not exact matches

But when asked by Sen. Bob Corker (R - TN) if human activity has contributed to climate change, Tillerson said that «the increase in the greenhouse gas concentrations in the atmosphere are having an effect,» and that «our ability to predict that effect is very limited.»

WHEREAS, in furtherance of a united effort to address the reality and ramifications of climate change, nations of the world assembled in Rio de Janiero in 1992 and proposed the United Nations Framework Convention on Climate Change («UNFCC») in an effort to stabilize concentrations of climate - altering gases in the atmosphere, which UNFCC was adopted in 1994, and has since been ratified by 197 nations, including the United Schange, nations of the world assembled in Rio de Janiero in 1992 and proposed the United Nations Framework Convention on Climate Change («UNFCC») in an effort to stabilize concentrations of climate - altering gases in the atmosphere, which UNFCC was adopted in 1994, and has since been ratified by 197 nations, including the United SChange («UNFCC») in an effort to stabilize concentrations of climate - altering gases in the atmosphere, which UNFCC was adopted in 1994, and has since been ratified by 197 nations, including the United States;

WHEREAS, there are significant long - term risks to the economy and the environment of the United States from the temperature increases and climatic disruptions that are projected to result from increased greenhouse gas concentrations and the resultant climate change;

Drivers of Climate Change Atmospheric concentrations of many gases — primarily carbon dioxide, methane, nitrous oxide and halocarbons (gases once used widely as refrigerants and spray propellants)-- have increased because of human activities.

Biello: A lot of scientists that I've spoken to think we have no chance of meeting 450 ppm given that we haven't done hardly anything to change our course and there are other scientists who say that we have already well past kind of the safe point for concentration of the greenhouse gases in the atmosphere.

Climate change is not driven just by increased greenhouse gas concentrations; other mechanisms — both natural and human - induced — also play a part.

The draft report by the U.S. Global Change Research Program says it is likely the world will forfeit its ability to meet «rapid emission reduction» scenarios needed to stabilize greenhouse gas concentrations «within a few years.»

But critics like Fugere said that Exxon Mobil may be missing the bigger picture, especially in light of the most recent findings from the Intergovernmental Panel on Climate Change, which hold that the world is already witnessing the harsh realities of climate change and that conditions will worsen unless steps are taken quickly to reduce greenhouse gas concentrations (ClimateWire, MarcChange, which hold that the world is already witnessing the harsh realities of climate change and that conditions will worsen unless steps are taken quickly to reduce greenhouse gas concentrations (ClimateWire, Marcchange and that conditions will worsen unless steps are taken quickly to reduce greenhouse gas concentrations (ClimateWire, March 31).

Even if emissions were immediately reduced enough to stabilize greenhouse gas concentrations at current levels, climate change would continue for centuries.

About half of this near - term warming represents a «commitment» to future climate change arising from the inertia of the climate system response to current atmospheric concentrations of greenhouse gases.

However, solar variability alone can not explain the post-1970 global temperature trends, especially the global temperature rise in the last three decades of the 20th Century, which has been attributed by the Inter-Governmental Panel on Climate Change (IPCC) to increased concentrations of greenhouse gases in the atmosphere.»

On climate action: «The APS reiterates its 2007 call to support actions that will reduce the emissions, and ultimately the concentration, of greenhouse gases, as well as increase the resilience of society to a changing climate.

Climate change caused by rising concentrations of greenhouse gases in the atmosphere is causing more extreme rainfall and snowfall — and floods

«There is a certain ironic satisfaction in seeing a study funded by the Koch Brothers — the greatest funders of climate change denial and disinformation on the planet — demonstrate what scientists have known with some degree of confidence for nearly two decades: that the globe is indeed warming, and that this warming can only be explained by human - caused increases in greenhouse gas concentrations,» he wrote.

The study does a «very nice job» of using different approaches to show that climate change is a dominant force, says Thomas Lovejoy, president of the H. John Heinz III Center for Science, Economics, and the Environment in Washington, D.C. «I think the single most important public policy [issue] here is agreeing on what the limit should be on greenhouse gas concentration,» he says.

They rapidly detect and continuously respond to extremely small changes in the concentrations of gases including ammonia, carbon dioxide, and nitrogen oxide.

He acknowledged that the words «climate change» can be controversial among some people, but added, «As far as greenhouse gas emissions and concentrations in the atmosphere, I don't think there's any controversy.

Taking factors such as sea surface temperature, greenhouse gases and natural aerosol particles into consideration, the researchers determined that changes in the concentration of black carbon could be the primary driving force behind the observed alterations to the hydrological cycle in the region.

This represents a shift in the usual analysis of climate change, particularly in international negotiations, which tend to focus on how much concentrations of greenhouse gases in the atmosphere will rise by a particular date.

Although the process is energy - and water - intensive, there is hope it could play a role in reducing the concentration of greenhouse gases in the atmosphere and minimizing the impact of climate change on the rest of the world.

Increasing concentrations of greenhouse gases are changing the climate.

Already, the planet's average temperature has warmed by 0.7 degree C, which is «very likely» (greater than 90 percent certain) to be a result of the rising concentrations of greenhouse gases in the atmosphere, according to the U.N. Intergovernmental Panel on Climate Change.

It increases the ability to predict how changes in land use or climate warming could affect the sources and global concentrations of greenhouse gases in the atmosphere.

For the RCP8.5 projections, which represents stronger increases in greenhouse gas concentrations than RCP4.5, there was a striking level of consistency in the magnitude of change in AR frequency — all models showed an approximate doubling of the number of future ARs compared to the simulations for 1980 — 2005.

Although computer models used to project climate changes from increasing greenhouse gas concentrations consistently simulate an increasing upward airflow in the tropics with global warming, this flow can not be directly observed.

«Detailed chemical measurements in Antarctic ice cores show that massive, halogen - rich eruptions from the West Antarctic Mt. Takahe volcano coincided exactly with the onset of the most rapid, widespread climate change in the Southern Hemisphere during the end of the last ice age and the start of increasing global greenhouse gas concentrations,» according to McConnell, who leads DRI's ultra-trace chemical ice core analytical laboratory.

And those feedbacks ultimately determine the extent to which that initial warming will be amplified, but they don't even change the fact that you elevate greenhouse gas concentrations in the atmosphere and you'll get a warming of the surface.

«This underscores that large, sustained changes in global temperature like those observed over the last century require drivers such as increased greenhouse gas concentrations,» said lead author Patrick Brown, a PhD student at Duke's Nicholas School of the Environment.

Non-polar glacial ice holds a wealth of information about past changes in climate, the environment and especially atmospheric composition, such as variations in temperature, atmospheric concentrations of greenhouse gases and emissions of natural aerosols or human - made pollutants... The glaciers therefore hold the memory of former climates and help to predict future environmental changes.

In the Central Hardwoods, the effects of a changing climate are expected to include rising temperatures due to a rise in greenhouse gas concentrations, leading to longer growing seasons.

Then again, given the climate change impacts already seen at present greenhouse gas concentrations, the world may not have much choice.

The bottom line is that only drastic cuts in global emissions of CO2, of two - thirds or more, can stop the concentration of the gas rising ever higher and stave off ever more severe climate change.

The researchers warn, however, that the future evolution of the AMO remains uncertain, with many factors potentially affecting how it interacts with atmospheric circulation patterns, such as Arctic sea ice loss, changes in solar radiation, volcanic eruptions and concentrations of greenhouse gases in the atmosphere.

By studying the past climate, scientists can understand better how temperature responds to changes in greenhouse - gas concentrations in the atmosphere.

Instruments on the platforms will monitor changes in the concentrations of gases such carbon dioxide, which is mainly produced when vegetation is burnt during the dry season.

Previous work with strontium cobaltites relied on changes in the oxygen concentration in the surrounding gas atmosphere to control which of the two forms the material would take, but that is inherently a much slower and more difficult process to control, Lu says.

The reason may well be climate change caused by increasing concentrations of atmospheric greenhouse gases — now roughly 390 parts per million, up from 280 ppm in the 1700s.

At the same time, even if California meets its ambitious target, it may not make a huge dent in the atmospheric concentrations of greenhouse gases causing climate change.

«It is true that there are other factors (such as volcanism, the changes in the orbit and the axis of the Earth, the solar cycle), but numerous scientific studies indicate that most of the global warming in recent decades is due to the large concentration of greenhouse gases (carbon dioxide, methane, nitrogen oxide and others) mainly emitted due to human activity.»

In the midst of an unseasonably warm winter in the Pacific Northwest, a comparison of four publicly available climate projections has shown broad agreement that the region will become considerably warmer in the next century if greenhouse gas concentrations in the atmosphere rise to the highest levels projected in the the Intergovernmental Panel on Climate Change (IPCC) «business - as - usual» scenario.

To resolve the energy poverty of billions will likely require burning more fossil fuels, but preventing catastrophic climate change definitely requires reducing concentrations of atmospheric greenhouse gas.

It also means that scientists and other experts are going to have to monitor measures other than just atmospheric concentration of greenhouse gases to catch catastrophic climate change developing.

To me the very fact that we have been inducing major changes in the concentration of greenhouse gases is alarming.

These rising atmospheric greenhouse gas concentrations have led to an increase in global average temperatures of ~ 0.2 °C decade — 1, much of which has been absorbed by the oceans, whilst the oceanic uptake of atmospheric CO2 has led to major changes in surface ocean pH (Levitus et al., 2000, 2005; Feely et al., 2008; Hoegh - Guldberg and Bruno, 2010; Mora et al., 2013; Roemmich et al., 2015).

The heights of the rectangular bars denote best estimate values guided by published values of the climate change agents and conversion to radiative perturbations using simplified expressions for the greenhouse gas concentrations and model calculations for the ice sheets, vegetation and mineral dust.

«The increased use of clean energy sources that do not emit greenhouse gases or conventional air pollutants... would be doubly beneficial to global food security, as they do not contribute to either climate change or increased surface - ozone concentrations,» she said.

ACPI assumes a 1 percent annual increase in the rate of greenhouse gas concentrations through the year 2100, for little change in precipitation and an average temperature increase of 1.5 to 2 degrees centigrade at least through the middle of 21st century.

Changes in important global atmospheric greenhouse gas concentrations from year 0 to 2005 AD (ppm, ppb = parts per million and parts per billion, respectively)(Forster et al. 2007).

Climate change scenarios are based on projections of future greenhouse gas (particularly carbon dioxide) emissions and resulting atmospheric concentrations given various plausible but imagined combinations of how governments, societies, economies, and technologies will change in the future.

The students knew that the CO2 values were changing throughout the day, but none seemed to recognize when concentrations of this gas rose or fell in their air.