Sentences with phrase «atmospheric gas concentrations»

For the «2013 as observed» experiment, the atmospheric model uses observed sea surface temperature data from December 2012 to November 2013 from the Operational Sea Surface Temperature and Sea Ice Analysis (OSTIA) dataset (Stark et al. 2007; Donlon et al. 2012) and present day atmospheric gas concentrations to simulate weather events that are possible given the observed climate conditions.

It was actually submitted by a commenter to this site of the more alarmist persuasion (without the PDO bands), to try to debunk the link between temperature and the sun (silly rabbit — the earth» s temperature is not driven by the sun, but by parts per million changes in atmospheric gas concentrations!).

The reason for scientific concern over global warming rests on basic physics — infrared absorption — and robust measurements of atmospheric gas concentrations.

in wind speed and atmospheric gas concentrations, allowing us to.

Not exact matches

I want to discuss a contemporary moral epidemic: the notion that increasing atmospheric concentrations of greenhouse gases, notably carbon dioxide, will have disastrous consequences for mankind and for the planet.

In addition to the isotope concentration, the air bubbles trapped in the ice cores allow for measurement of the atmospheric concentrations of trace gases, including greenhouse gases carbon dioxide, methane, and nitrous oxide.

We can determine the radiative forcing associated with the long - lived greenhouse gases fairly precisely, because we know their atmospheric concentrations, their spatial distribution and the physics of their interaction with radiation.

Keeping atmospheric concentrations of greenhouse gases below 550 ppm, let alone going back to 350 ppm or below, will not only require a massive shift in human society — from industry to diet — but also, most likely, new technologies, such as capturing CO2 directly from the air.

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.

In particular, the connection between rising concentrations of atmospheric greenhouse gases and the increased warming of the global climate system is more certain than ever.

«Which of those is correct at this stage is unknown, but the droughts being driven by atmospheric greenhouse gas concentrations is in line with some of these global circulation models,» Lewis said.

Other scientists have criticized the planetary boundaries as too generous (for example, allowing too much human appropriation of freshwater flows) or employing the wrong metric (atmospheric concentrations of CO2 rather than cumulative emissions of greenhouse gases).

(For comparison, in 2014, average atmospheric concentration of the gas was about 398.5 ppm and had risen about 2.1 ppm each year in the previous decade.)

Tropospheric ozone — a greenhouse gas and the kind that affects the air we breathe — can increase in concentration because of atmospheric conditions, or can result from human activities.

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.

Already, atmospheric concentrations of just CO2 have reached 400 ppm at times and all greenhouse gases put together are now at 430 ppm.

To verify emissions from the San Juan and Four Corners coal - fired power plants, the Los Alamos team deployed ground - based solar spectrometers and point sensors to measure atmospheric concentrations of gases at a site close to these power plants.

The IPCC suggests that atmospheric concentrations of greenhouse gases should not exceed 450 ppm to meet nations» expressed aspiration to hold temperature rise to 2 degrees C or less.

The atmospheric concentration of carbon dioxide, a critical greenhouse gas, is higher than it has been for at least 650,000 years.

On May 9, instruments atop Hawaii's Mauna Loa volcano pegged the atmospheric concentration of carbon dioxide (CO2)-- the gas that contributes most to global warming — at slightly above 400 parts per million (ppm).

[NASA's OCO - 2 Mission in Pictures (Gallery)-RSB- The concentration of atmospheric carbon dioxide — a heat - trapping «greenhouse gas» — has risen from 280 parts per million (ppm) before the Industrial Revolution to about 400 ppm today.

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.

«Many datasets, for example, the data for the total concentration of atmospheric greenhouse gases, show that human population has been a strong driver of the total impact of humans on our planet Earth.

The bad news is that such record - breaking downpours, blizzards and sleet storms are likely to continue to get worse as atmospheric greenhouse gas concentrations continue to rise, causing global temperatures to continue to warm and making the atmosphere more and more humid.

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.

For example, research in Los Angeles is showing that small methane leaks in homes between the gas meter and heaters and stoves could be leading to higher atmospheric methane concentrations there, he said, whereas other cities may have old, leaking gas pipes.

Cutting - edge techniques enabled the researchers to detect the presence of gases even at part - per - trillion levels, one million times less concentrated than atmospheric CO2 concentrations.

Within that range of atmospheric density, even higher concentrations of carbon dioxide wouldn't have been adequate to counteract the faint young sun, suggesting that methane, ethane or other strong greenhouse gases kept Earth from freezing.

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.

«(A) describe increased risks to natural systems and society that would result from an increase in global average temperature 3.6 degrees Fahrenheit (2 degrees Celsius) above the pre-industrial average or an increase in atmospheric greenhouse gas concentrations above 450 parts per million carbon dioxide equivalent; and

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.

(A) that will contribute to a stabilization of atmospheric greenhouse gas concentrations thorough reduction, avoidance, or sequestration of energy - related emissions and --

«(C) global atmospheric concentrations of greenhouse gases, expressed in annual concentration units as well as carbon dioxide equivalents based on 100 - year global warming potentials;

The relative atmospheric concentrations of greenhouse gases as well as aerosol and particulate content coupled with other climate information gives insight into both the importance of these as drivers of temperature as well as how these drivers might couple in either a positive or negative feedback sense (Beckman and Mahoney, 1998).

It's correct that an extra methane molecule is something like 25 times more influential than an extra CO2 molecule, although that ratio is primarily determined by the background atmospheric concentration of either gas, and GWP typically assumes that forcing is linear in emission pulse, which is not valid for very large perturbations.

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).

Since each of the infrared - absorbing atmospheric gases has its own unique absorption spectrum, the total infrared absorption capacity of the atmosphere is then due to the real - time concentration and distribution of all the gases in the atmosphere, from the surface to the stratosphere.

Variations of deuterium (δD; black), a proxy for local temperature, and the atmospheric concentrations of the greenhouse gases CO2 (red), CH4 (blue), and nitrous oxide (N2O; green) derived from air trapped within ice cores from Antarctica and from recent atmospheric measurements (Petit et al., 1999; Indermühle et al., 2000; EPICA community members, 2004; Spahni et al., 2005; Siegenthaler et al., 2005a, b).

The evidence here is more circumstantial, but Danish researcher Lars - Georg Hersoug notes that atmospheric levels of the gas have risen during the same period and that in the United States, obesity has increased most rapidly on the East Coast, where CO2 concentrations are highest.

a) How will the recovering ozone hole and rising greenhouse - gas concentrations affect regional and global atmospheric circulation and climate?

The science is clear: Global warming and climate disruption will continue to accelerate until we stabilize atmospheric concentrations of greenhouse gases.

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 Earth's atmospheric methane concentration has increased by about 150 % since 1750, and it accounts for 20 % of the total radiative forcing from all of the long - lived and globally mixed greenhouse gases (these gases don't include water vapor which is by far the largest component of the greenhouse effect).

It was at that time that atmospheric greenhouse gas concentrations stopped following the periodic pattern of the Milankovitch cycles.

For example, changes in Earth's atmospheric composition (especially the concentrations of greenhouse gases) may alter the climate, while climate change itself can change the atmospheric composition (for example by changing the rate at which weathering removes CO2).

If we continue increasing atmospheric CO2 concentrations with emissions from the burning of coal, oil, and gas, the Earth will continue to get hotter.