Sentences with phrase «global greenhouse gas concentrations»
Given the long time horizon of global greenhouse gas concentrations, EPA also analyzes long term climate scenarios.
http://climate.uu-uno.org/
«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.
Not exact matches
``... a number of scientific studies indicate that most global warming... is due to the great concentration of greenhouse gases released mainly as a result of human activity... these gases do not allow the warmth of the sun's rays reflected by the earth to be dispersed in space.
... A number of scientific studies indicate that most global warming in recent decades is due to the great concentration of greenhouse gases (carbon dioxide, methane, nitrogen oxides and others) released mainly as a result of human activity... Doomsday predictions can no longer be met with irony or disdain.
Most scientists and climatologists agree that weird weather is at least in part the result of global warming — a steady increase in the average temperature of the surface of the Earth thought to be caused by increased concentrations of greenhouse gasses produced by human activity.
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.»
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.»
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.
He also models the global warming that would occur if concentrations of greenhouse gases in the atmosphere were to be doubled (due to increases in carbon dioxide and methane emissions from dragons and the excessive use of wildfire).
To achieve 450 ppm, the concentration of greenhouse gases in the atmosphere associated with a 2 - degree Celsius rise in global average temperatures (a target advocated by the European Union), the «aggregate of fossil - fuel demand will peak out in 2020,» Tanaka says.
«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.
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.
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.
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.
«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.
Climate scientists say politicians must move on from Kyoto - style piecemeal negotiations on individual national targets to a global plan to cap concentrations of critical greenhouse gases, especially CO2.
«I agree that carbon dioxide is a greenhouse gas, that greenhouse gas concentrations in the atmosphere are increasing as a result of human activities — primarily burning coal, oil, and natural gas — and that this means the global mean temperature is likely to rise,» Ebell said in the statement released by CEI yesterday.
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.
«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.»
«(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
«(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;
(«Most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.»)
Second, average global temperatures have been increasing, and it is very likely this is due in large part to the increased greenhouse gas concentrations.
There is evidence that Earth has gone through at least one globally frozen, «snowball» state in the last billion years, which it is thought to have exited after several million years because global ice - cover shut off the carbonate - silicate cycle, thereby allowing greenhouse gases to build up to sufficient concentration to melt the ice.
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 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.
«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.
They are the most advanced tools currently available for simulating the response of the global climate system — including processes in the atmosphere, ocean, cryosphere, and land surface — to increasing greenhouse gas concentrations.
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.
They are the most advanced tools currently available for simulating the response of the global climate system to increasing greenhouse gas concentrations.
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).
The mechanism for reducing anthropogenic global warming, initiated through radiative forcing of greenhouse gases, is to stop emissions and reduce their concentration in the atmosphere to levels which do not stimulate carbon feedbacks.
The AGU has made a powerful case that increasing concentrations of greenhouse gases in the atmosphere significantly contributes to the warming of the global climate.
Global warming in the modern era is being driven by increasing concentrations of greenhouse gases in the atmosphere, which leads to an enhanced greenhouse effect.
Without mitigation of emissions, we may generate greenhouse gas concentrations and global temperatures more akin to those of the early Paleogene, over forty million years ago, than those of the current geological period, the Neogene.
This warming has been linked to a similarly rapid increase in the concentration of greenhouse gases in Earth's atmosphere, which acted to trap heat and drive up global temperatures by more than 5 °C in just a few thousand years.
[2] According to the Intergovernmental Panel on Climate Change (IPCC), most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in human greenhouse gas concentrations.
Global climate change will occur as a result of global warming resulting from the greenhouse effect caused by the retention of heat in the lower atmosphere of the Earth caused by the concentration of gases of various Global climate change will occur as a result of global warming resulting from the greenhouse effect caused by the retention of heat in the lower atmosphere of the Earth caused by the concentration of gases of various global warming resulting from the greenhouse effect caused by the retention of heat in the lower atmosphere of the Earth caused by the concentration of gases of various kinds.
Res — math.ku.dk ``... Evidence is mounting that changes in global surface temperature can be attributed to human activities that increase the atmospheric concentration of greenhouse gases and tropospheric sulfates [Sanier et al, 1996a, 1996b].
It is extremely likely that more than half of the observed increase in global average surface temperature from 1951 to 2010 was caused by the anthropogenic increase in greenhouse gas concentrations and other anthropogenic forcings together.
AR4: Most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.
We are therefore committed to -LSB-...] stabilize greenhouse gas concentrations at a level that would prevent dangerous anthropogenic interference with the climate system -LSB-...] we will consider seriously the decisions made by the European Union, Canada and Japan which include at least a halving of global emissions by 2050.
AR5: It is extremely likely that more than half of the observed increase in global average surface temperature from 1951 to 2010 was caused by the anthropogenic increase in greenhouse gas concentrations and other anthropogenic forcings together.
Natural, large - scale climate patterns like the PDO and El Niño - La Niña are superimposed on global warming caused by increasing concentrations of greenhouse gases and landscape changes like deforestation.
We are committed to avoiding the most serious consequences of climate change and determined to achieve the stabilization of atmospheric concentrations of global greenhouse gases consistent with the ultimate objective of Article 2 of the Convention and within a time frame that should be compatible with economic growth and energy security.
It reiterated the principle of «common but differentiated responsibilities» — which notes the historical responsibility of industrialized («Annex I») countries for virtually all emissions leading to the increase in the global atmospheric concentration of greenhouse gasses.
Yu Kosaka & Shang - Ping Xie, as published in Nature (http://www.nature.com/nature/journal/v501/n7467/full/nature12534.html): «Despite the continued increase in atmospheric greenhouse gas concentrations, the annual - mean global temperature has not risen in the twenty - first century1, challenging the prevailing view that anthropogenic forcing causes climate warming.»
Abstract: «Understanding how global temperature changes with increasing atmospheric greenhouse gas concentrations, or climate sensitivity, is of central importance to climate change research.
Of course, if you're serious about stabilizing atmospheric concentrations of greenhouse gases, achieving the American goal in 2020 is just step one in what would have to be a centurylong 12 - step (or more) program to completely decouple global energy use from processes that generate heat - trapping emissions.