This position does not appear to be supported by any observational evidence, much like the highly exaggerated claims concerning the effects of
human carbon dioxide emissions on climate.
This means the IPCC is tasked with finding a human effect of
human carbon dioxide emissions on the climate, whereas NIPCC looks at climate change «in the round,» without bias.
Given the high uncertainty about the net effect of
human carbon dioxide emissions on global temperatures, we only see natural changes in climate.
Not exact matches
ScienceInsider reported this week that the U.S. Senate rejected a resolution last week that would have blocked the Environmental Protection Agency from regulating
carbon dioxide emissions based
on its finding that they endanger
human health, among other stories.
Human activities that act
on the crust are likely to multiply in the future, Wilson noted, as projects to tap into geothermal sources of energy and to store
carbon dioxide emissions become more widespread.
The team discovered that the
human impact
on biogenic methane and nitrous oxide
emissions far outweighed the
human impact
on the terrestrial uptake of
carbon dioxide, meaning that
humans have caused the terrestrial biosphere to further contribute to warming.
And such techniques might be capable, at best, of sequestering one billion metric tons of
carbon dioxide per year (based
on the extent of iron - deficient waters around the globe), compared with annual
human emissions of more than eight billion metric tons and rising.
In the time since the 2007 version of this report, the
human effect
on the climate has grown more than 40 percent stronger, thanks to continued
emissions of greenhouse gases and more precision in measurements, with
carbon dioxide leading the charge.
If the
human population continues to grow, more pressure will be put
on carbon dioxide emissions — leaving future generations vulnerable to the effects of climate change.
«My perspective is that it is not settled science,» he told the Senate spending panel, arguing that the jury is still out
on whether
carbon dioxide emissions from
human activities are driving global warming.
Hi Andrew, Paper you may have, but couldn't find
on «The phase relation between atmospheric
carbon dioxide and global temperature» CO2 lagging temp change, which really turns the entire AGW argument
on its head: http://www.sciencedirect.com/science/article/pii/S0921818112001658 Highlights: ► Changes in global atmospheric CO2 are lagging 11 — 12 months behind changes in global sea surface temperature ► Changes in atmospheric CO2 are not tracking changes in
human emissions.
Researchers shed light
on the relationship between
humans»
carbon dioxide emissions and future climate change.
A failure to reduce
carbon dioxide emissions significantly within the next decade will have large adverse effects
on the climate that will be essentially irreversible
on human time scales.
Indeed, the rehabilitation of our water bodies can not happen with a denial of science that portrays the toll of global warming
on our oceans due to excessive
carbon dioxide emissions and
human folly in overexploitation, unregulated and destructive fishing, marine pollution and habitat destruction.
Please note the last sentence of 71 pages from Exhibit 5: presentation
on «Understanding how
carbon dioxide emissions from
human activity contribute to global climate change»).
Libby's article speaks volumes about the difficulty of moving a world that is more than 80 percent dependent
on fossil fuels toward one largely free of
carbon dioxide emissions from such fuels within two or three generations, even as the
human population heads toward 9 billion (more or less).
As for the ethics of all of this, Donald A. Brown of Pennsylvania State University argues that the world's top emitters of greenhouse gases are morally obligated to curb
carbon dioxide and similar
emissions based
on the level of certainty that is already established
on the impacts of those
emissions — most of which will be in poorer places with small contributions to the
human - caused gas buildup in the atmosphere.
I often try to step back and take the point of view of the atmosphere in considering claims of progress
on curbing
emissions of
carbon dioxide from
human activities.
There's some sobering news
on two fronts that many climate campaigners, and politicians, have put at the forefront of their climate agendas: passing legislation capping
carbon dioxide emissions and demonstrating technology for capturing and burying the main
human - generated greenhouse gas.
Humans» use of fossil fuels, and the resulting
carbon dioxide air
emissions, has no material effect
on climate.
Ironically these are the effective ways of mitigating the broad range of
human pressures
on the climate system — sequestering
carbon dioxide in the landscape, reducing methane, nitrous oxide, tropospheric ozone, black
carbon and CFC
emissions.
Over the last three decades, five IPCC «assessment reports,» dozens of computer models, scores of conferences and thousands of papers focused heavily
on human fossil fuel use and
carbon dioxide and greenhouse gas
emissions, as being responsible for «dangerous» global warming, climate change, climate «disruption,» and almost every «extreme» weather or climate event.
Karlsson claims that «
human emissions of
carbon dioxide and other anthropogenic greenhouse gases is [sic] a substantial influence
on the current warming trend.»
«Depending
on emissions rates,
carbon dioxide concentrations could double or nearly triple from today's level by the end of the century, greatly amplifying future
human impacts
on climate.
The most recent report of the International Panel
on Climate Change says it is extremely likely that
human influence has been the dominant cause of this warming which is driven by the build up of
carbon dioxide emissions from fossil fuel combustion, cement production, and land use changes.
The concept is that every
human being
on this planet has the right to emit the same amount of
carbon dioxide; therefore, citizens of developing nations would be given the same quota for
emissions as citizens in industrialized nations.
«The
human impact
on global climate is small, and any warming that may occur as a result of
human carbon dioxide (CO2) and other greenhouse gas
emissions is likely to have little effect
on global temperatures, the cryosphere (ice - covered areas), hydrosphere (oceans, lakes, and rivers), or weather.
Like DiCaprio's short film
Carbon, released in the weeks prior to the United Nations» Climate Summit 2014, Before the Flood is based
on the highly debatable hypothesis that
carbon dioxide (CO2)
emissions from
human activities are causing catastrophic climate change.
The established science shows
carbon dioxide is a greenhouse gas, that
humans produce greenhouse gas
emissions, and that
humans have had some effect
on Earth's climate.
In a sharp change from its cautious approach in the past, the National Academy of Sciences
on Wednesday called for taxes
on carbon emissions, a cap - and - trade program for such
emissions or some other strong action to curb runaway global warming.Such actions, which would increase the cost of using coal and petroleum — at least in the immediate future — are necessary because «climate change is occurring, the Earth is warming... concentrations of
carbon dioxide are increasing, and there are very clear fingerprints that link [those effects] to
humans,» said Pamela A. Matson of Stanford University, who chaired one of five panels organized by the academy at the request of Congress to look at the science of climate change and how the nation should respond.
And it endorses the deployment of various
carbon dioxide removal methods as relatively benign ways to counter
human emissions, arguing that the decision
on mitigation versus
carbon dioxide removal is largely a question of cost.
In the conclusion to his «Plan B» chapter (p 228), Bob Carter writes: «It is therefore time to move away from stale «he - says - she - says» arguments about whether
human carbon dioxide emissions are causing dangerous warming, and
on to designing effective policies of hazard management for all climate change, based
on adaptation responses that are tailored for individual countries or regions... By their very nature, strategies that can cope with the dangers and vagaries of natural climate change will readily cope with
human - caused change too should it ever become manifest.»
And when the energy - short 1970s turned into the energy surplus of the 1980s, RFF's angst shifted to issues surrounding a
human influence
on global climate, primarily from
carbon dioxide (CO2)
emissions from the burning of coal, oil, and natural gas.
Up until now, 29 per cent of
human emissions of
carbon dioxide has been taken up by the oceans, 28 per cent has been absorbed by plant growth
on land, and the remaining 43 per cent has accumulated in the atmosphere.
Its revised projection indicates that if we stick with business as usual, in terms of
carbon dioxide emissions, average surface temperatures
on «Earth by 2100 will hit levels far beyond anything
humans have ever experienced.
The new target: Naomi Oreskes who last week found her research used as a foil by some lawmakers in the U.S. House of Representatives to try and discredit the widely - accepted and growing view that there is a broad scientific consensus
on the evidence of
human - caused global warming caused by rising
carbon dioxide emissions.
While you acknowledged that the climate is changing and that
humans are having an impact
on it, it is critically important that you understand that
emissions of
carbon dioxide and other greenhouse gases are the primary cause.
Velasco dismissed computer models that are used to predict global warming as a result of man - made
carbon dioxide emissions, noting that «today we are experiencing a scientific revolution in which
on one side there are are supercomputers and
on the other,
human intelligence.
As the warming of oceans is the dominating reason for the increased content of atmospheric
carbon dioxide, and as nowadays the
human yearly portion (about 8 GtC CO2) of the all yearly CO2
emissions (little over 200 GtC CO2) to the atmosphere is about 4 %, the
human role
on the recent yearly increase of CO2 in the atmosphere is also about 4 %.
A failure to reduce
carbon dioxide emissions significantly within the next decade will have large adverse effects
on the climate that will be essentially irreversible
on human time scales.
It is therefore difficult to see how the Intergovernmental Panel
on Climate Change (the IPCC) can maintain there is a 95 per cent probability that
human emissions of
carbon dioxide have caused most of the global warming that has occurred over the last several decades (4).
All of the above is background to one of the great mysteries of the climate change issue... how the Intergovernmental Panel
on Climate Change (the IPCC) can maintain there is a 95 per cent probability that
human emissions of
carbon dioxide have caused most of the global warming that has occurred over the last several decades (4).
Instead,
carbon removal aims to reduce historical
human influence
on the climate system by decreasing the amount of excess
carbon dioxide in the atmosphere — essentially reversing the influence of anthropogenic greenhouse gas (GHG)
emissions.
They also lessen reliance
on fossil fuels, thus decreasing
carbon dioxide emissions and other forms of pollution harmful to
humans and the planet alike.
E.g., research assumes greenhouse gas
emissions cause warming without explicitly stating
humans are the cause»...
carbon sequestration in soil is important for mitigating global climate change» (4a) No position Does not address or mention the cause of global warming (4b) Uncertain Expresses position that
human's role
on recent global warming is uncertain / undefined «While the extent of
human - induced global warming is inconclusive...» (5) Implicit rejection Implies
humans have had a minimal impact
on global warming without saying so explicitly E.g., proposing a natural mechanism is the main cause of global warming»... anywhere from a major portion to all of the warming of the 20th century could plausibly result from natural causes according to these results» (6) Explicit rejection without quantification Explicitly minimizes or rejects that
humans are causing global warming»... the global temperature record provides little support for the catastrophic view of the greenhouse effect» (7) Explicit rejection with quantification Explicitly states that
humans are causing less than half of global warming «The
human contribution to the CO2 content in the atmosphere and the increase in temperature is negligible in comparison with other sources of
carbon dioxide emission»»
Hi Andrew, Paper you may have, but couldn't find
on «The phase relation between atmospheric
carbon dioxide and global temperature» CO2 lagging temp change, which really turns the entire AGW argument
on its head: http://www.sciencedirect.com/science/article/pii/S0921818112001658 Highlights: ► Changes in global atmospheric CO2 are lagging 11 — 12 months behind changes in global sea surface temperature ► Changes in atmospheric CO2 are not tracking changes in
human emissions.
On page 3 Postma states that anthropogenic global warming means a general warming of the atmosphere theorized to be
human emission of
carbon dioxide (CO2), which is then theorized to cause a strengthening of the effect of the Greenhouse Theory, which actually causes said warming.
Second of all,
humans can't easily have nearly as significant effect
on water vapor in the atmosphere as
carbon dioxide by direct
emissions of these gases.
Meanwhile,
carbon dioxide levels continue to rise, and hardly anyone doubts anymore that projects to pull
carbon dioxide emissions out of the air will be a necessary transitional measure if the population of
humans on Earth hope to continue energy - spurred growth while converting to renewable energy sources.
Regarding your second question, the paper of Frank et al agrees with my paper in many points, except for the argument
on the global warming caused by
emissions of
carbon dioxide through
human activities.