Sentences with phrase «global atmospheric concentrations of»

Increase in global atmospheric concentrations of mercury inferred from measurements over the Atlantic Ocean

To date, much international discussion at the interface of science and politics has taken as a rule of thumb that — as a first step — global atmospheric concentrations of carbon dioxide should not exceed approximately twice the concentrations which existed before the modern industrial era.

«Global atmospheric concentrations of carbon dioxide, methane and nitrous oxide have increased markedly as a result of human activities since 1750 and now far exceed pre-industrial values determined from ice cores spanning many thousands of years.»

Why are the global atmospheric concentrations of methane leveling off?

«(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;

«(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;

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.

SAN FRANCISCO — NASA revealed the first - ever images of the global atmospheric concentration of carbon dioxide, the key long - lived global warming gas.

Not exact matches

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.

Our record is also of interest to climate policy developments, because it opens the door to detailed comparisons between past atmospheric CO2 concentrations, global temperatures, and sea levels, which has enormous value to long - term future climate projections.»

Now a group of American and British scientists have used a new chemical technique to measure the change in terrestrial temperature associated with this shift in global atmospheric CO2 concentrations.

However, this has to a large extent not led to immediate action to address the severity of the imminent crisis of rising global temperatures and associated problems due to the increase in atmospheric carbon dioxide concentrations due to human activity.

Photosynthesis — the process green plants use to convert energy from the sun that plants use to grow — from tropical forests, plays a huge role in determining global atmospheric CO2 concentration, which is closely linked the global temperature and rate of climate change.

During the early 2000s, environmental scientists studying methane emissions noticed something unexpected: the global concentrations of atmospheric methane (CH4)-- which had increased for decades, driven by methane emissions from fossil fuels and agriculture — inexplicably leveled off.

The increased use of synthetic chemicals, including pesticides and pharmaceuticals to attack unwanted organisms, has outpaced the rates of change in rising atmospheric CO2 concentrations and other agents of global environmental change over the past 45 years, a new Duke - led analysis reveals.

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).

Effect of increased concentrations of atmospheric carbon dioxide on the global threat of zinc deficiency: a modelling study.

The work included data from a variety of sources, including national emissions inventories kept by the United Nations, global estimates of energy use and direct measurements of atmospheric CO2 concentrations, and involved dozens of authors from institutes around the world.

«It is ironic that high concentrations of molecules with high global warming potential (GWP), the worst - case scenario for Earth's climate, is the optimal scenario for detecting an alien civilization, as GWP increases with stronger infrared absorption and longer atmospheric lifetime,» say the authors.

While ECS is the equilibrium global mean temperature change that eventually results from atmospheric CO2 doubling, the smaller TCR refers to the global mean temperature change that is realised at the time of CO2 doubling under an idealised scenario in which CO2 concentrations increase by 1 % yr — 1 (Cubasch et al., 2001; see also Section 8.6.2.1).

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).

Research shows that atmospheric carbon dioxide concentrations will increase to the point that 2 °C (3.6 °F) of global warming will be inevitable within the next 22 years.

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

Increasing atmospheric concentrations of carbon dioxide do not only cause global warming, but probably also trigger increased occurrences of extreme weather events such as long - lasting droughts, heat - waves, heavy rainfall events or extreme storms.

If we pin atmospheric carbon dioxide concentration to right about 300 to 320 ppm, we are looking at 20 - 30 thousand years of stable climate, with huge fresh water reserves, and we are only about half way into a global mass extinction.

Regarding your second comment, in point of fact temperature increase is linear with logarithmically increasing CO2: climate sensitivity, you may recall, measures global mean surface temperature increase per doubling of atmospheric concentration of CO2.

The Pallas research infrastructure has been extensively instrumented for modern and versatile monitoring of the environment since the start of continuous monitoring of atmospheric sulphur dioxide (SO2) and ozone (O3) concentrations at Sammaltunturi in September 1991, and with the setup of the Global Atmosphere Watch (GAW) station in 1994.

Once global carbon dioxide emissions had been reduced to zero, some combination of atmospheric decay and carbon dioxide extraction, probably partially offset by some level of carbon dioxide re-release from the worlds oceans, might possibly reduce the atmospheric carbon dioxide concentration to comply with the NAAQS.

The absolutely essential first step in reducing the atmospheric concentration to 350 ppm is a total global cessation of anthropogenic carbon emissions.

Although NAAQS regulation of lead was both technologically and economically feasible, not even a global depression lasting several decades would suffice to lower atmospheric carbon dioxide concentrations below current levels.

First let's define the «equilibrium climate sensitivity» as the «equilibrium change in global mean surface temperature following a doubling of the atmospheric (equivalent) CO2 concentration.

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].

By 2100, the ocean uptake rate of 5 Gt C yr - 1 is balanced by the terrestrial carbon source, and atmospheric CO2 concentrations are 250 p.p.m.v. higher in our fully coupled simulation than in uncoupled carbon models2, resulting in a global - mean warming of 5.5 K, as compared to 4 K without the carbon - cycle feedback.

For example, Isaken et al (2011) quantify how as atmospheric methane concentrations increase, the global warming potential, GWP, of methane also increases (see references at end of post).

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.

However, atmospheric CO2 content plays an important internal feedback role.Orbital - scale variability in CO2 concentrations over the last several hundred thousand years covaries (Figure 5.3) with variability in proxy records including reconstructions of global ice volume (Lisiecki and Raymo, 2005), climatic conditions in central Asia (Prokopenko et al., 2006), tropical (Herbert et al., 2010) and Southern Ocean SST (Pahnke et al., 2003; Lang and Wolff, 2011), Antarctic temperature (Parrenin et al., 2013), deep - ocean temperature (Elder eld et al., 2010), biogeochemical conditions in the Northet al., 2008).

In view of the present discussion of the role of carbon dioxide in effecting global temperature I would like to know of any laboratory or bench experiments that show a temperature - CO2 concentration curve within the range of currently measured atmospheric CO2 levels.

In a world suffering from briskly advancing population growth, skyrocketing atmospheric CO2 concentrations, and consequential Global Warming, the formation of Terra Preta anew (Terra Preta Nova) could provide the largest signifiicant double whammy to these problems.

We collectively need to demand that there is no acceptable response to climate change other than strong emission reductions, ensuring that atmospheric concentrations of CO2 are returned to 350ppm levels, global temperature rise is kept (at the maximum) 2 °C and, even better, 1.5 °C — to do that, as was emphasized on numerous occasions, we need a F.A.B. climate deal: Fair, Ambitious, and (perhaps most importantly) Binding.

Abstract: «Understanding how global temperature changes with increasing atmospheric greenhouse gas concentrations, or climate sensitivity, is of central importance to climate change research.

Transient climate sensitivity: The global mean surface - air temperature achieved when atmospheric CO2 concentrations achieve a doubling over pre-industrial CO2 levels increasing at the assumed rate of one percent per year, compounded.

Here I'm going to examine some graphs that Lord Monckton commonly uses to show that the IPCC has incorrectly predicted the recent evolution of global atmospheric CO2 concentration and mean temperature.

The approximately 20 - year lag (between atmospheric CO2 concentration change and reaching equilibrium temperature) is an emerging property (just like sensitivity) of the global climate system in the GCM models used in the paper I linked to above, if I understood it correctly.

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

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 emissionOf 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 emissionof 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.

We find that the global methane hydrate inventory decreases by approximately 70 % (35 %) under four times (twice) the atmospheric CO2 concentration and is accompanied by significant global oxygen depletion on a timescale of thousands of years.

Indeed, it's almost certain we will exceed 450ppmv before we stabilise global concentrations of atmospheric CO2 and it's virtually certain that this continuing upward trend will be reflected in serious costs to the human comnunities who encounter it.

Taking account of their historic responsibility, as well as the need to secure climate justice for the world's poorest and most vulnerable communities, developed countries must commit to legally binding and ambitious emission reduction targets consistent with limiting global average surface warming to well below 1.5 degrees Celsius above preindustrial levels and long - term stabilization of atmospheric greenhouse gas concentrations at well below below 350 p.p.m., and that to achieve this the agreement at COP15 U.N.F.C.C.C. should include a goal of peaking global emissions by 2015 with a sharp decline thereafter towards a global reduction of 85 percent by 2050,

How does arrogance or any other personal attitudinal trait on anyone's part affect the scientific evidence for global warming due to increasing atmospheric concentrations of IR - excitable gases like CO2?