Sentences with phrase «higher concentrations of greenhouse»

Similarly, an atmosphere with higher concentrations of the greenhouse gases, CO2 and H2O, also reduces the cooling at night.

Carbon dioxide removal addresses the root cause of climate change — high concentrations of the greenhouse gas in the atmosphere — and generally have well - understood benefits and risks, but current technologies would take decades to achieve moderate results and be cost - prohibitive at scales large enough to have a sizeable impact.

High concentrations of greenhouse gases would have been required to offset low solar luminosity early in Earth's history.

The objections to Keystone XL stem at least in part from widespread concern over the production of oil from tar sands, which ravages the landscape, pollutes rivers and emits high concentrations of greenhouse gases.

More heating of the sea surface due to the higher concentration of greenhouse gases in the atmosphere led to anomalously high temperatures in the Gulf of Mexico.

The solution to this «faint young Sun paradox» appears to lie in the presence of unusually high concentrations of greenhouse gases at the time, particularly methane and carbon dioxide.

Not exact matches

This year has already brought higher temperatures than normal nation - wide, and that trend is expected to continue, in part due to global warming which is caused by rising concentrations of greenhouse gases in the atmosphere.

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

But fossil fuel burning will keep pumping out more CO2 year after year, pushing concentrations of the greenhouse gas higher and higher.

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.

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.

Using Mg / Ca paleothermometry from the planktonic foraminifera Globigerinoides ruber from the past 500 k.y. at Ocean Drilling Program (ODP) Site 871 in the western Pacific warm pool, we estimate the tropical Pacific climate sensitivity parameter (λ) to be 0.94 — 1.06 °C (W m − 2) − 1, higher than that predicted by model simulations of the Last Glacial Maximum or by models of doubled greenhouse gas concentration forcing.

The higher concentration of atmospheric greenhouse gases during the PETM therefore seems like a better explanation for mammalian dwarfing than the increase in temperature itself.

Greenhouse gases (which prevent dispersal of heat generated by the planet's surface, after this receiving solar radiation) of higher concentration on Earth are carbon dioxide (CO2), methane (CH 4), nitrous oxide (N2O), Compounds of chlorofluorocarbon (CFC) and water vapor (H2O).

Such close linkages between CO2 concentration and climate variability are consistent with modelling results suggesting with high confidence that glacial — interglacial variations of CO2 and other greenhouse gases [CH4, N2O] explain a considerable fraction of glacial — interglacial climate variability in regions not directly affected by the northern hemisphere continental ice sheets (Timmermann et al., 2009; Shakun et al., 2012).

But there was little disagreement that playing what amounts to two games of high - stakes poker at the same time by driving up greenhouse - gas concentrations is a bad idea, particularly as ever more people concentrate on coastlines in both rich and poor countries.

You're exactly right that we are «playing what amounts to two games of high - stakes poker at the same time by driving up greenhouse - gas concentrations».

With all the carbon available in the biosphere, the concentration of greenhouse gases such as carbon dioxide and light hydrocarbons had to have been substantially higher in the atmosphere than it is now.

Using Mg / Ca paleothermometry from the planktonic foraminifera Globigerinoides ruber from the past 500 k.y. at Ocean Drilling Program (ODP) Site 871 in the western Pacific warm pool, we estimate the tropical Pacific climate sensitivity parameter (λ) to be 0.94 — 1.06 °C (W m − 2) − 1, higher than that predicted by model simulations of the Last Glacial Maximum or by models of doubled greenhouse gas concentration forcing.

This leads to a higher equilibrium temperature, but balance is reestablished again in a sense that time averages of energy in - and - out are equal for each volume element, given some fixed elevation of greenhouse gas concentration.

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.

We can look at climate models, and they tell us what we can expect, but it is also useful to have an idea of why increased greenhouse gas concentrations result in higher surface temperatures.

I was delighted to read the second paragraph of this post: ``... We can look at climate models, and they tell us what we can expect, but it is also useful to have an idea of why increased greenhouse gas concentrations result in higher surface temperatures...».

The team's results show that human - induced (anthropogenic) changes in well - mixed greenhouse gases, which are fairly evenly distributed in the atmosphere, and ozone, a greenhouse gas that is found in higher concentrations in the stratosphere, are the primary causes of the approximately 200 - meter rise in the tropopause that has occurred since 1979.

«Radiative forcing at high concentrations of well - mixed greenhouse gases,» Brendan Byrne and C. Goldblatt, Geophysical Research Letters, Jan 13 2014.

The ongoing warming trend — as well as the increasing frequency and severity of high - humidity heat waves — is ultimately driven by rising concentrations of carbon dioxide and other greenhouse gases in the atmosphere.

But it will also make history as marking a new era of climate change reality with record high greenhouse gas concentrations,» said WMO Secretary - General Petteri Taalas.

Hanoi, Viet Nam, 26 February 2018 — In his welcome remarks to participants of the Technology Needs Assessment (TNA) workshop, APN Secretariat Director, Mr. Seiji Tsutsui underscored that «Southeast Asia is a natural disaster - prone region, and it is predicted that disasters such as floods, typhoons, high - tides and landslides will be more extreme because of the increase in anthropogenic greenhouse gas emissions and increasing population concentration in urban areas.»

NATURALLY OCCURRING METHANE CAPTURE — Methane emissions may occur from land areas where coal or other high concentrations of un-extracted fossil fuels are present underground, resulting in a naturally occurring source of greenhouse gas (GHG) emissions.

«The last time the concentration of Earth's main greenhouse gas reached this mark, horses and camels lived in the high Arctic.

John Lanchbery from the Royal Society for the Protection of Birds told his colleagues that on the basis of ecological effects and the observed inability of some natural ecosystems to adapt, atmospheric concentrations of greenhouse gases are already too high.

Critics of the CO 2 role in climate change point out that water vapours are a far more potent factor in creating the greenhouse effect as their concentration in the atmosphere is five to 10 times higher than that of CO 2.

The technologies currently exist to dramatically increase our fuel efficiency today to as high as 45 miles per gallon — and we must take advantage of these technologies in order to reduce atmospheric greenhouse gas concentrations to 350 parts per million and prevent climate catastrophe.

2.10 All model simulations, whether they were forced with increased concentrations of greenhouse gases and aerosols or with increased concentrations of greenhouse gases alone, show the follow - ing features: greater surface warming of the land than of the sea in winter; a maximum surface warming in high northern latitudes in winter... All these changes are associated with identifiable physical mechanisms.

As Emily Shuckburgh of the British Antarctic Survey said, the last time concentrations of greenhouse gas were as high as they are, sea levels were around 10 meters higher.

In order to have a reasonable chance of achieving the goal, the concentration of greenhouse gases would probably need to be stabilised at a level no higher than 450 ppm CO2 - eq.

To suggest that because near surface temperatures have flattened at or near the highest on record requires «abandoning» a sinking ship is to be grossly underinformed about the full scope and scale of the multiple changes going on and the confidence that anthropogenic climate continues unabated as it will so long as humans continue to increase greenhouse gas concentrations.

The combination of these gases in high concentrations causes a catastrophic greenhouse effect that traps incident sunlight and prevents it from radiating into space.

The second is the urgency of the need for hard - to - imagine action to dramatically reduce greenhouse gas (ghg) emissions at all scales, that is globally, nationally, and locally, but particularly in high - emitting nations such as the United States in light of the limited amount of ghgs that can be emitted by the entire world before raising atmospheric ghg concentrations to very dangerous levels and in light of the need to fairly allocate ghg emissions reductions obligations around the world.

The higher the concentration of «greenhouse» gases, the more optically thick the atmosphere, and therefore radiative cooling to space takes place from higher up in the atmosphere.

The IPCC 2007 Fourth Assessment of climate change science concluded that large reductions in the emissions of greenhouse gases, principally CO2, are needed soon to slow the increase of atmospheric concentrations, and avoid reaching unacceptable levels.However, climate change is happening even faster than previously estimated; global CO2 emissions since 2000 have been higher than even the highest predictions, Arctic sea ice has been melting at rates much faster than predicted, and the rise in the sea level has become more rapid.

Based on current knowledge, however, it appears that achieving a high probability of limiting global average temperature rise to 2C will require that the increase in greenhouse - gas concentrations as well as all the other warming and cooling influences on global climate in the year 2100, as compared with 1750, should add up to a net warming no greater than what would be associated with a CO2 concentration of about 400 parts per million (ppm).

Concentrations of carbon dioxide, a greenhouse gas, will surge to a new high in the atmosphere in 2014.

«Levels of greenhouse gases in the atmosphere reached new highs, and in the northern hemisphere spring 2015 the three - month global average concentration of CO2 crossed the 400 parts per million barrier for the first time.

Given that the lapse rate is largely independent of the greenhouse gas concentration, the higher the radiative surface, the higher the surface temperature.

The simulated three - dimensional spatial pattern of the temperature changes induced by increasing concentrations of a well - mixed greenhouse gas, such as carbon dioxide, is complicated and varies from model to model, but one common aspect is the tendency for the lower to mid-troposphere to warm more rapidly than the surface, except over high latitudes.

Scientists caution that even though the world is warming over time, with the amount of heat - trapping greenhouse gas concentrations in the atmosphere now unsettlingly ensconced at the highest level in human history, every year is not expected to set a new record.

Increasing greenhouse gas concentrations are therefore not responsible for the initial transmission of warming from the high latitudes to the southeast African tropics.

«Climate science» as it is used by warmists implies adherence to a set of beliefs: (1) Increasing greenhouse gas concentrations will warm the Earth's surface and atmosphere; (2) Human production of CO2 is producing significant increases in CO2 concentration; (3) The rate of rise of temperature in the 20th and 21st centuries is unprecedented compared to the rates of change of temperature in the previous two millennia and this can only be due to rising greenhouse gas concentrations; (4) The climate of the 19th century was ideal and may be taken as a standard to compare against any current climate; (5) global climate models, while still not perfect, are good enough to indicate that continued use of fossil fuels at projected rates in the 21st century will cause the CO2 concentration to rise to a high level by 2100 (possibly 700 to 900 ppm); (6) The global average temperature under this condition will rise more than 3 °C from the late 19th century ideal; (7) The negative impact on humanity of such a rise will be enormous; (8) The only alternative to such a disaster is to immediately and sharply reduce CO2 emissions (reducing emissions in 2050 by 80 % compared to today's rate) and continue further reductions after 2050; (9) Even with such draconian CO2 reductions, the CO2 concentration is likely to reach at least 450 to 500 ppm by 2100 resulting in significant damage to humanity; (10) Such reductions in CO2 emissions are technically feasible and economically affordable while providing adequate energy to a growing world population that is increasingly industrializing.

Higher temperatures today are largely sustained by increased atmospheric concentrations of greenhouse gases, especially carbon dioxide.