OTOH, decreased diurnal and annual range is a prediction for
a greenhouse warming mechanism.
Not exact matches
After many years of vague talk by governments about fighting global
warming, it is encouraging that the debate has finally begun to tackle specific
mechanisms to achieve cuts in
greenhouse gas emissions.Â
«For example, there's no political polarization on climate change with greater understanding of the
greenhouse mechanism that drives global
warming,» he wrote in an email.
Release of methane hydrates has previously been suggested as a
mechanism to drive runaway
greenhouse events, as
warming oceans releases trapped methane that causes further
warming and releases more methane.
All the models I've seen rely on the assumption that an increase in atmospheric
greenhouse gases will necessarily increase the long - term average temperature of the globe and that all the other
mechanisms that cause or counteract
warming are understood and modeled fairly accurately.
These are fingerprints of the increased
greenhouse effect, the major
mechanism of anthropogenic global
warming.
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.
All the models I've seen rely on the assumption that an increase in atmospheric
greenhouse gases will necessarily increase the long - term average temperature of the globe and that all the other
mechanisms that cause or counteract
warming are understood and modeled fairly accurately.
From Wikipedia
Greenhouse effect The mechanism is named after a faulty analogy with the effect of solar radiation passing through glass and warming a g
Greenhouse effect The
mechanism is named after a faulty analogy with the effect of solar radiation passing through glass and
warming a
greenhousegreenhouse.
We know that the
mechanism responsible for the observed
warming is a
greenhouse mechanism (otherwise you'd see more
warming in the daytime and summer rather than nighttime and winter).
A different perspective on the same problem: (try expanding your views a little) THE
GREENHOUSE EFFECT: The is no argument that extra GHG absorbtion causes
warming within the radiative transport
mechanism.
And while methane from Siberian lakes is a relatively modest contributor to climate change compared to human
greenhouse emissions by industry and automobiles, it helps intensify a positive feedback
mechanism for global
warming.
The IPCC presented the «
greenhouse effect» as
warming by back radiation, 70 years after professor Wood demonstrated that this
mechanism does not work at all or is negligible.
The most statistics can tell us at present is that there does appear to be a genuine
warming trend in figure A. Whether this trend is the effect of
greenhouse gas emissions or of a natural fluctuation due to some as - yet - undiscovered
mechanism can not be determined from an analysis of the global mean temperature alone.
Anthropogenic
greenhouse warming is a theory whose basic
mechanism is well understood, but whose magnitude is highly uncertain.
The California Global
Warming Solutions Act aims to reduce
greenhouse gas emissions by 25 per cent by 2020 through market - based
mechanisms.
Increased atmospheric CO2 tends to close this window and cause outgoing radiation to emerge from higher, colder levels, thus
warming the surface and lower atmosphere by the so called
greenhouse mechanism»
New research has found evidence of a positive feedback
mechanism brought on by climate change in which global
warming itself may intensify a rise in
greenhouse gases, resulting in additional
warming.
2.10 All model simulations, whether they were forced with increased concentrations of
greenhouse gases and aerosols or with increased concentrations of
greenhouse gases alone, show the follow - ing features: greater surface
warming of the land than of the sea in winter; a maximum surface
warming in high northern latitudes in winter... All these changes are associated with identifiable physical
mechanisms.
While I acknowledge that the levels of carbon dioxide and other
greenhouse gases in our atmosphere are increasing, that climate change is real, that human activity plays a role in these changes and that these changes are impacting our state, I simply disagree that RGGI is an effective
mechanism for addressing global
warming.
The causal case is a cumulative case of: 1) correlation + 2) well - evidenced
mechanism (i.e. plausibility) + 3) primacy, where the proposed cause occurs before the effect + 4) robustness of the correlation under multiple tests / conditions + 5) experimental evidence that adding the cause subsequently results in the effect + 6) exclusion of other likely causes (see point 7 as well) + 7) specificity, where the effect having hallmarks of the cause (ex: the observed tropospheric
warming and stratopsheric cooling, is a hallmark of
greenhouse - gas - induced
warming, not
warming from solar forcing) 8) a physical gradient (or a dose - response), where more of the cause produces a larger effect, or more of the cause is more likely to produce the effect +....
Thus there does seem to be a
mechanism whereby the
warming effect from human CO2 (indeed all
greenhouse gases) could be removed naturally as it arises.
Your point 4: «The early onset of sustained, significant
warming in palaeoclimate records and model simulations suggests that
greenhouse forcing of industrial - era
warming commenced as early as the mid-nineteenth century and included an enhanced equatorial ocean response
mechanism.
This is exactly what would be expected from surface
warming mediated by
greenhouse gases or any other
warming mechanism.
The
mechanism is named after the effect of solar radiation passing through glass and
warming a
greenhouse, but the way it retains heat is fundamentally different as a
greenhouse works by reducing airflow, isolating the
warm air inside the structure so that heat is not lost by convection.»
Regarding the earlier point, the numbers refer to the window region, where IR escapes to space with little interception from
greenhouse gases, and so as the surface
warms (from any
mechanism) window OLR will increase.
Unlike water vapor, CO2 has no other
mechanism beside its
greenhouse effect by which it might cause
warming.
If it does not appear as predicted, will you then accept that CO2
greenhouse effect with its concomitant feedbacks is not a major
warming mechanism?
Radiative Heat Transfer is a fast response
mechanism and there is no basis for the idea that it would take decades for
warming to take place for any given change to the
greenhouse gases in the atmosphere.
The California Global
Warming Solutions Act of 2006 (AB32) established a comprehensive program of regulatory and market
mechanisms to achieve quantifiable, cost - effective reductions in
greenhouse gases.
Every article I have seen assumes that IR trapping from
greenhouse gasses is a legitimate
mechanism... but I have not found even one example of an experiment under laboratory conditions demontrating that re-radiation of trapped IR can
warm anything.
Based on an extensive literature review, we suggest that (1) climate
warming occurs with great uncertainty in the magnitude of the temperature increase; (2) both human activities and natural forces contribute to climate change, but their relative contributions are difficult to quantify; and (3) the dominant role of the increase in the atmospheric concentration of
greenhouse gases (including CO2) in the global
warming claimed by the Intergovernmental Panel on Climate Change (IPCC) is questioned by the scientific communities because of large uncertainties in the
mechanisms of natural factors and anthropogenic activities and in the sources of the increased atmospheric CO2 concentration.
When someone comes up with an experimental method that predictably and reproducibly can mathematically describe the cause / effect
mechanism between
greenhouse gases and CO2 then I'll believe global
warming is real.
The
mechanisms whereby climate change due to global
warming caused by heat - trapping
greenhouse gases, and enhanced by increased water vapor, have been well explained in many loci.
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»»
Her explanation of the
greenhouse effect — which would help scientists understand the underlying
mechanisms behind global
warming in the 20th century — predated Tyndall's by three years.
Even Richard Lindzen agrees that tropical tropospheric amplification follows from basic physics and has nothing to do with the
greenhouse effect
mechanism... and that the fact that is a problem with the observational data, not the models (and, at any rate, nothing to do with the
mechanism causing the
warming).
The specific fingerprint of
warming due to an increased
greenhouse effect (at least relative to, for example, the
mechanism of heating by increased solar radiation) is that the
greenhouse effect is predicted to cause cooling in the stratosphere.
That is a totally phucking different
mechanism than
warming caused by a well mixed non-condensing
greenhouse gas.
The problem is that the «science is settled» crowd spent the last 20 years insisting that natural
mechanisms are puny compared to
greenhouse warming, which is why they were so sure that
greenhouse gases are the driving force in climate.
The fact that the stratosphere has been cooling as the troposphere
warms is absolutely diagnostic of a
greenhouse mechanism.
These are fingerprints of the increased
greenhouse effect, the major
mechanism of anthropogenic global
warming.
For example, regarding the validity of the evidence that the basic
greenhouse gas
mechanism is causing recent global
warming, there is near - unanimous scientific consensus among the experts that have real climate credentials, are working in the field with a position in a recognized scientific department at a university or laboratory (not a right - wing think tank), and who publish in the peer - reviewed scientific literature (non-peer reviewed think tank papers don't count).