Worst case emission scenarios, extra methane release, the works.
But if they're growing (as a GW feedback) at a substantially high rate, say 7 % / yr, then we'd be looking at triple David Archer's
worst case emission scenario to year 2100.
It was one of the model predictions, based on
a worst case emissions scenario which did not come to pass.
Not exact matches
Our current
emissions trajectory is close to the
worst -
case scenario of the Intergovernmental Panel on Climate Change (IPCC).
Under the
worst -
case scenario (RCP 8.5), which assumes that greenhouse gas
emissions continue to rise throughout the 21st century, the authors show the potential for extremely large net increases in temperature - related mortality in the warmer regions of the world.
Coffel and Radley Horton of Columbia University projected the number of hot summer days under a
worst -
case greenhouse gas
emission scenario for
Sub-Saharan Africa, who in the
worst -
case over the next 40 years would be 4 percent of greenhouse gas
emissions, you can give them a pass and say, «Hey, any way that you guys can get energy, if it's natural gas, coal, gasoline, you know, whatever you want.
Le Quéré and her colleagues show how today's
emissions are near - perfectly in line with the
worst -
case scenario.
Within the last few days I've read in news services of Dr. Mike Raupach «s and Dr. Pep Canadell's report for the Aussie CSIRO Global Carbon Project that
emissions have intensified and carbon - loading of the atmosphere has increased near or beyond IPCC
worst -
case scenarios.
The model, however, assumes the
worst -
case scenario of greenhouse gas
emissions, offering hope that if
emissions are curbed, the impact would be reduced.
«Up to 8.5 feet of global sea level rise is possible by 2100» in a
worst -
case emissions scenario.
The
worst -
case emissions scenario, the track that we are currently on, estimates a rise in temperature of 4.7 ° to 8.6 °F by 2100.
But if carbon
emissions continue to track on something resembling a
worst -
case scenario, the full 11 feet of ice locked in West Antarctica might be freed up, their study showed.
This is why it's good that Paul Krugman, among others, has pointed to the work of Martin Weitzman at Harvard, who's been making the point for awhile that the economic logic of action on
emissions comes as much from what is not known about the
worst -
case risks as what is already established.
The rapid acceleration in CO2
emissions depicted is seen as
worst case, and highly unlikely.
Key Message 1: Climatic Trends Recent observations confirm that, given high rates of observed
emissions, the
worst -
case IPCC scenario trajectories (or even
worse) are being realised.
In reality, CO2
emissions have been accelerating in recent years, exceeding the
worst -
case scenarios of the IPCC, and CO2 concentrations are increasing.
# 22: I ask myself, if global CO2
emissions and atmospheric CO2 levels have exceeded the
worst case scenario predicted by the IPCC # 4, for 2008, were is there any integrity in the statement,» We reconfirm the significance of the IPCC # 4 ″?
-- The main issue is that our actual GHG
emissions have pretty much exceeded or are in the «
worse -
case» scenarios projected in the past.
This is presented as a
worst -
case scenario — what might be expected to happen if a) nothing is done to curb GHG
emissions and b) the climate sensitivity is in the higher range Peter Cox and other leading scientists now believe possible.
We're going to burn more coal over the next 30 years than in all of human history, CO2
emissions are rising at
worst case expectations, and we're looking at 6 degrees Farenheit temperature rise over that time.
Your elaboration of our future confused me - if
worst case methane bursts are roughly equivalent to CO2
emissions, and therefore somewhat manageable, this represents an outlier opinion.
Pessimist: «The
worst case scenario for methane is the same as our CO2
emissions, except that once the
emissions really get started it will be impossible to stop them.
, the actual
worst case of human CO2
emission growth due to the pipeline is miniscule.
The draft's authors suggest that under the
worst -
case emissions scenario the modelers considered, global sea levels could rise by up to 1 meter by the end of the century, about two centimeters higher than the top of the range offered in 2007.
Ok, between your rough calculation and tonto52's / max's discussion about ocean sink uptake, the range of estimated temp increase could be 2.2 deg C (
worse case) and 1.0 deg C (best
case) if a stringent 50 %
emission reduction plan were successfully implemented.
Some 98 percent of working climate scientists agree that the atmosphere is already warming in response to human greenhouse - gas
emissions, and the most recent research suggests that we are on a path toward what were once considered «
worst case» scenarios.
In contrast, the U.S. emits some 6.5 gigatons of CO2
emissions each year - indeed, a
worst case of an extra 21 million tons is the proverbial krill speck in the ocean, so to speak.
I will argue that all the actions taken together until now to reduce our
emissions of carbon dioxide will not achieve a serious reduction, and in some
cases, they will actually make matters
worse.
Australia's CSIRO's atmospheric research unit has found the world is warming faster than predicted by the United Nations» top climate change body, with harmful
emissions exceeding
worst -
case estimates.
For example, the acceleration in fossil fuel CO2
emissions is tracking the
worst case scenarios used by the IPCC AR4 (Copenhagen Diagnosis 2009).
So, once we clear away the underbrush, we can see that the
case for a carbon tax or a cap - and - trade
emissions rationing system is really that it would be a hedge against the risk that actual damages from warming would be much, much
worse than current risk - adjusted projections indicate.
For instance, it found that for the year 2040 on the
worst -
case emissions pathway, the global average sea - level rise would be 0.2 meters (0.65 feet), but «more than 90 percent of coastal areas will experience sea level rise exceeding the global estimate.»
The
worst -
case emissions pathway, RCP8.5, is a scenario that burns a huge amount of fossil fuels, especially coal.
And the greenhouse gas
emissions from coal have contributed significantly to climate change, a risk that is unfathomably
worse than the
worst case dangers of nuclear power.
The value of the
emission models would be in establishing the «barely feasible»
worst case scenario and the conditions under which this scenario might be created, and in rejecting more extreme scenarios.
If
emissions continue for the rest of the century at the same rate as over the last decade we would end up with about 578ppm by 2100, even before we allow for increases in population and GDP, so that best
case scenario is slightly
worse than your
worst case scenario.
Only substantial
emission prices have the potential to address the
worst case scenarios, because only when the market is enabled to value carbon sequestration will that activity grow to the needed scale.
Note: what it's saying is that the «
worst case»
EMISSIONS may be greater than predicted.
If the entire grid were coal, you could double that (7,800 pounds), so even in that
worst -
case scenario, you'd still have far LOWER CO2
emissions from a plug - in Prius than from the average new car on the road running on gasoline.
«One expert group ran a
worst -
case computer simulation of what would happen if the U.S. does not curb
emissions, but other nations do meet their targets.
RCP8.5 represents the
worst -
case emissions scenario and assumes high, unregulated economic growth and increased burning of fossil fuels.
In the
worst case considered — which Wehner notes is not the
worst case possible since current
emissions levels are already higher — hot temperatures that recently were 20 - year events will become annual occurrences.
«Based on the science going into them, the [next] IPCC reports will have a real impact in offering diplomats a reckoning — and they don't handle reckonings well — with the observation that [greenhouse gas]
emissions are all following the
worst of the
worst -
case scenarios for the future.»
Mongabay: Global carbon
emissions last year exceeded
worst -
case scenario predictions from just four years before, according to the US Department of Energy (DOE).
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Emissions, Information and Communication, International Agencies, Lessons, News, Pollution, Population, UNFCCC, Urbanization Comments Off on Last year's greenhouse gas emissions topple worst - case scenario Tags: Climate change, Developing country, Energy, Environment, Greenhouse gas, Impacts and Indicators, IPCC Fourth Assessment Report, Sustainable de
Emissions, Information and Communication, International Agencies, Lessons, News, Pollution, Population, UNFCCC, Urbanization Comments Off on Last year's greenhouse gas
emissions topple worst - case scenario Tags: Climate change, Developing country, Energy, Environment, Greenhouse gas, Impacts and Indicators, IPCC Fourth Assessment Report, Sustainable de
emissions topple
worst -
case scenario Tags: Climate change, Developing country, Energy, Environment, Greenhouse gas, Impacts and Indicators, IPCC Fourth Assessment Report, Sustainable development
At the moment, our
emissions are tracking along some of the
worst case scenarios (Figure 3), and if this continues, we will blow well past a doubling of atmospheric CO2.
Romm's argument is that in recent years annual
emissions have been higher than assumed in the IPCC's
worst case (A1FI) scenario, and that we are on track to get to 1,000 ppm in 2100.
After inspection of the actual greenhouse gas
emissions data over the last decade or so, Garnaut says that the reality is
worse than the
worst -
case scenario.
Findings: The future
emission and temperature trends are calculated according to a baseline scenario by the IPCC, which is the
worst -
case scenario RCP8.5.