Sentences with phrase «on carbon dioxide concentration»
Hence we get hurricanes, storms, tornados and other natural disasters, whose intensity largely depends on carbon dioxide concentration.
https://sputniknews.com/
Neither Volpe nor C. Marie Eckert, another attorney for the trade groups, responded to requests for comment about their clients» views on carbon dioxide concentrations.
Not exact matches
A joint statement from the National Academy of Sciences and Royal Society in Britain said «human - induced increases in CO2 (carbon dioxide) concentrations have been the dominant influence on the long - term global surface temperature increase.»
-LRB-... The level of the most important heat - trapping gas in the atmosphere, carbon dioxide, has passed a long - feared milestone, scientists reported Friday, reaching a concentration not seen on the earth for millions of years.
«For example, [measuring] chlorophyll a will give you information about how much biological activity is going on, and eventually more information about the concentration of carbon dioxide within the ocean and the atmosphere,» said Yoshihisa Shirayama, executive director of research at the Japan Agency for Marine - Earth Science and Technology in Tokyo.
Five cultures each were kept under control conditions (15 °C) and at elevated water temperature (26 °C) in combination with three different concentrations of carbon dioxide (CO2): a control value with today's conditions, the conditions of the Intergovernmental Panel on Climate Change's «worst case scenario» and the highest possible degree of acidification.
It remains to be demonstrated whether dumping iron at sea will be able to affect that loss — or have any impact on the rise of carbon dioxide concentrations in the atmosphere.
On March 12, researchers reported that carbon dioxide concentrations in the atmosphere moved above 400 parts - per - million en route to a springtime peak.
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).
Lead author of the study, Sabrina Wenzel of DLR explains: «the carbon dioxide concentrations measured for many decades on Hawaii and in Alaska show characteristic cycles, with lower values in the summer when strong photosynthesis causes plants to absorb CO2, and higher - values in the winter when photosynthesis stops.
In using the model to assess the ocean - carbon sink, the researchers assumed a «business as usual» carbon dioxide emissions trajectory, the Representative Concentration Pathway 8.5 scenario found in the Intergovernmental Panel on Climate Change for 2006 - 2010, where emissions continue to rise throughout the 21st century.
On one hand, rising concentrations of carbon dioxide can benefit trees and help them use water more efficiently.
The dataset includes e.g. information on the future development of winds and temperatures in the Antarctic, and is based on the assumption that the carbon dioxide concentration in the atmosphere will reach 700 parts per million by the year 2100.
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.
Effect of increased concentrations of atmospheric carbon dioxide on the global threat of zinc deficiency: a modelling study.
The team focused on how much hotter the planet will be in the year that carbon dioxide concentrations reach double their pre-industrial value.
For the study, five cultures were kept under a constant temperature and three different concentrations of carbon dioxide (CO2): a control value with today's conditions, the conditions that could be reached until the end of this century according to the most critical calculations of the Intergovernmental Panel on Climate Change (IPCC), and the highest possible degree of acidification.
Fueled by people's pyromania and the El Niño global weather phenomenon, carbon dioxide concentrations reached 409.44 parts per million on April 9 at an air - sampling station atop Hawaii's Mauna Loa, a rise of more than five ppm since the same date last year.
Receding Himalayan glaciers Almost six years ago, I was the editor of a single - topic issue on energy for Scientific American that included an article by Princeton University's Robert Socolow that set out a well - reasoned plan for how to keep atmospheric carbon dioxide concentrations below a planet - livable threshold of 560 ppm.
If we embark on a path that is equivalent to setting emissions to zero now (say by having a period of negative emissions in the 2035 to 2050 time frame), and call the sequestration we accomplish mitigation then mitigation can arrest climate change, make adaptation unneeded and bring us to a safe concentration of carbon dioxide in the atmosphere as Hansen has pointed out.
«(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;
Without alternatives to fossil fuel, we are committed to steadily increasing the concentration of carbon dioxide in the atmosphere and the oceans, with the attendant deleterious effects on greenhouse gas accumulation in the atmosphere and ocean acidification.
With JWST, a few hours of integration time will be enough to detect Earth - like levels of water vapor, molecular oxygen, carbon dioxide and other generic biosignatures on planets orbiting a white dwarf; beyond that, observing the same planet for up to 1.7 days will be enough to detect the two CFCs in concentrations of 750 parts per trillion, or 10 times greater than on Earth.
This is expected to have a cooling effect on surface temperatures, which would offset the warming effect of high carbon dioxide concentrations.
Developed for the Commonwealth Marine Science Event 2018, this publication is an initiative by UK scientists and international partners, led by Plymouth Marine Laboratory, providing evidence - based science for policy making on the impacts of increasing concentrations of carbon dioxide and other greenhouse gases on the ocean and human systems.
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.
Armed with this information, scientists will be able to do a much better job forecasting atmospheric carbon dioxide concentrations in the future, he said, and in understanding the role of human activities on the carbon cycle.
The consensus is that several factors are important: atmospheric composition (the concentrations of carbon dioxide, methane); changes in the Earth's orbit around the Sun known as Milankovitch cycles (and possibly the Sun's orbit around the galaxy); the motion of tectonic plates resulting in changes in the relative location and amount of continental and oceanic crust on the Earth's surface, which could affect wind and ocean currents; variations in solar output; the orbital dynamics of the Earth - Moon system; and the impact of relatively large meteorites, and volcanism including eruptions of supervolcanoes.
The recent increase in carbon dioxide concentration is attributed to the El Niño event, which started in 2015 and goes on in 2016.
Palm trees grew on the North Slope of Alaska and carbon dioxide levels were 3 to 12 times higher than today's concentrations.
They suggest this «pause» in the acceleration of carbon dioxide concentrations was, in part, due to the effect of the temporary slowdown in global average surface warming during that same period on respiration, the process by which plants and soils release CO2.
Reasoning that, because it fluctuated daily, water vapour was continually recycling itself in and out of the atmosphere, he turned his attention to carbon dioxide, a gas resident for a long time in the atmosphere whose concentration was only (at that time) dramatically changed by major sources such as volcanoes or major drawdowns such as unusual and massive episodes of mineral weathering or the evolution of photosynthetic plants: events that occur on very long, geological timescales.
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).
Student scores on concentration tests were low in classrooms with high rates of carbon dioxide.
Although there are no reliable observations, atmospheric concentrations of carbon dioxide about 100 years ago, at about the start of the industrial revolution, are estimated to have been on the order of 270 to 290 parts per million (ppm).
Original post On Tuesday, a simple but sobering note predicting an imminent end to measurements of carbon dioxide in air lower than 400 parts per million was posted by the group at the Scripps Institution of Oceanography that has been carefully measuring the rising concentration of this greenhouse gas in the atmosphere since 1958.
For his part, Mr. Monckton says there is no need to exploit such events because he and others have exposed fatal weaknesses in the mainstream view that a strong warming effect is due to rising concentrations of carbon dioxide — regardless of the peer - reviewed, Nobel Prize - winning work of the Intergovernmental Panel on Climate Change, the conclusions of various national academies of science and 100 years of growing accord on the basics.
However, this in itself is not enough to define what level of warming is «dangerous,» especially since the projections of actual impacts for any level of warming are highly uncertain, and depend on further factors such as how quickly these levels are reached (so how long ecosystems and society have had to respond), and what other changes are associated with them (eg: carbon dioxide concentration, since this affects plant photosynthesis and water use efficiency, and ocean acidification).
By 2008, Rowland was warning that given humanity's apparent inaction on climate, «his best guess for the peak concentration of carbon dioxide» was a staggering «1,000 parts per million.»
In a phone chat, he said that arguments about specific levels of climate sensitivity, or specific goals for carbon dioxide concentrations, have little meaning as long as the world is not slowing down from its accelerating path on emissions.
The carbon dioxide concentration in the atmosphere is self - regulating, depending on its physical properties together with natural laws like the thermodynamics.
Many of the experts (like Dr Hansen) dealing with global warming rightfully only look at what they think is going on and since the concentration of carbon dioxide (although I still have no idea how they can get an average concentration reading instantly all over the world) has increased, the culprit of global warming is this increase of carbon dioxide.
That was clearly a more profound influence on a central component of the planetary system than humans raising the concentration of carbon dioxide 40 percent since the start of the industrial revolution.
I'll be writing more on the scope of what would have to happen to stop the buildup of carbon dioxide at just about any of the concentration peaks that have been tossed around lately as either «safe» or not totally calamitous.
First, he said, plainly, that no one knows at present how to get the world on a path toward stabilized concentrations of the main greenhouse emission, carbon dioxide.
Bill McKibben writes on body of science pointing to a very low «safe» long - term threshold for carbon dioxide concentrations — 350 parts per million — which was hit and passed in 1988, around the time McKibben and I began writing on global warming.
My colleague Felicity Barringer has a story filling in a detail on the White House's refusal to accept the need for restricting carbon dioxide as a pollutant, even as President Bush and the administration have accepted, with ever more firmness, that rising concentrations of the gas are a serious problem and must be reversed (somehow, someday).
It is findings like these that cause me to take a different stance on climate progress than Joe Romm, who demands that anyone seriously engaged in assessing climate policy pick a number — either for a safe target for stabilization of carbon dioxide concentrations or temperature rise.
Below you can read some of the input I received on Australia's booming exports of coal (and carbon dioxide emissions) and how they relate to the challenge of stabilizing the concentration of carbon dioxide in the atmosphere some time this century.
Marc Roberts has once again put his finger on a disturbing facet of the climate challenge — that the longevity of carbon dioxide makes it extremely difficult to stabilize its concentration in the atmosphere.