But I believe there is little doubt that the record - breaking scale and potential destructiveness of Sandy is due in large part to
the amplifying effects of warmer ocean temperatures, higher atmospheric moisture content, and unusual Arctic weather patterns.
The findings reinforce suggestions that strong positive ice — temperature feedbacks have emerged in the Arctic15, increasing the chances of further rapid warming and sea ice loss, and will probably affect polar ecosystems, ice - sheet mass balance and human activities in the Arctic...» *** This is the heart of polar amplification and has very little to do with your stated defintion of
amplifying the effects of warming going on at lower latitudes.
«In this condition, the ice sheet will continue to absorb more solar energy in a self - reinforcing feedback loop that
amplifies the effect of warming,» wrote Ohio State polar researcher Jason Box on the meltfactor.org blog.
Not exact matches
What's more, since this calculation does not take into account any
of the feedbacks likely to
amplify the
effect, well under 5000 TW may produce this degree
of warming.
«From a policy perspective, we have to recognize that we have been trending toward drier conditions over the last 1,500 years and the
warming in Nevada is only going to exacerbate that trend,» he said, noting that «
warmer temperatures cause more soil moisture to evaporate so you
amplify the
effects of drought when climate is
warming.
Current state -
of - the - art climate models predict that increasing water vapor concentrations in
warmer air will
amplify the greenhouse
effect created by anthropogenic greenhouse gases while maintaining nearly constant relative humidity.
This 2006 study found that the
effect of amplifying feedbacks in the climate system — where global
warming boosts atmospheric CO2 levels — «will promote
warming by an extra 15 percent to 78 percent on a century - scale» compared to typical estimates by the U.N.'s Intergovernmental Panel on Climate Change.
... Based on these results, further
warming and drying
of tropical forests is expected to result in less uptake and more release
of carbon on land, unfortunately
amplifying the
effect of fossil fuel emissions
warming the climate.
The drought - induced decline
of carbon - dense tropical forests and their replacement by lower - carbon savannas would release enormous amounts
of CO2 to the atmosphere,
amplifying global
warming far beyond the
effects of just the CO2 released by burning fossil fuels.
If the heat transport by the Atlantic thermohaline circulation suddenly increases for some reason (we'll come to that), Greenland suddenly gets
warm (an
effect amplified by receding sea ice cover
of the seas near Greenland) and Antarctica starts to cool.
Now, if
warming also causes increased CO2, then we may be talking about a positive feedback loop in which the
warming spirals upwards, which
amplifies the
warming effect of whatever CO2 we humans contribute to the atmosphere.
Where you then have a talik, from this combination
of geological and radiative forces, and then there is plenty
of free gas underneath that can migrate out easily through pathways once there are such tears, and then you add on top
of all that that it is a seismically active zone, one can easily see how global
warming could greatly
amplify the
effects of an earthquake at that fault zone.
Apart from these last concerns, the WAIS is much less worrying than the GIS, because the huge thermal inertia and albedo
effect of the EAIS, the antarctic continent itself, and the large amount
of antarctic sea ice in the southern winter, all act to reduce the degree
of warming for the WAIS (whereas the GIS is the victim
of various unfortunate circumstances which
amplify warming there).
Water vapor feedback can also
amplify the
warming effect of other greenhouse gases, such that the
warming brought about by increased carbon dioxide allows more water vapor to enter the atmosphere.
Assuming that scientists haven't left out anything vital, this suggests that the net
effect of water - based feedbacks is positive and would
amplify GHG - induced
warming by more than a factor
of two.Many assumptions have been made, but the historical evidence increases our confidence in model results.
I'd like to stick to facts: * CO2 levels are rising because we emit CO2 (so we can do something about it) * CO2 is a greenhouse gas * CO2 thus contributes to
warming of the surface * Other
effects compensate or
amplify these changes * Those other
effects haven't reversed / stopped the
warming trend yet
CO2 starts climate
warming, increased water vapor due to the Clausius - Clapeyron phenomenon
of thermodynamics, and then that water vapor
amplifies the greenhouse
effect to the desired, sufficiently frightening but sufficiently unverifiable critical level.
Its
warming effect, however, is simultaneously
amplified and dampened by positive and negative feedbacks such as increased water vapor (the most powerful greenhouse gas), reduced albedo, which is a measure
of Earth's reflectivity, changes in cloud characteristics, and CO2 exchanges with the ocean and terrestrial ecosystems.
''... the
warming is only missing if one believes computer models where so - called feedbacks involving water vapor and clouds greatly
amplify the small
effect of CO2.»
In particular, she worries that climate models «involve a lot
of theory and guesswork» about
amplifying feedbacks that enhance the uncontested
warming effect of CO2, which places her in the company
of lukewarmists.
Your guests would have us believe that sceptics contest the claim that «global
warming is happening», whereas the question that most sceptics
of climate science ask is about the role
of feedback mechanisms that are believed to
amplify the global
warming effect — a subject on which there is far less consensus that your guests will admit.
Here's a study which highlights the importance
of increased tropospheric humidity (water vapour) in
amplifying a
warming effect during the afforementioned Paleocene — Eocene Thermal Maximum — ttp: / / www.nature.com/nature/journal/v432/n7016/full/nature03115.
The iris hypothesis has not withstood the test
of time - subsequent research has found that if it exists, the
effect is much smaller than originally hypothesized, and may even slightly
amplify rather than reducing global
warming.
The IPPC has long conceded that catastrophic AGW is impossible without some further unknown, unobserved and unmeasured magick mystery forcing to
amplify the
warming effect of CO2.
This 2006 study found that the
effect of amplifying feedbacks in the climate system — where global
warming boosts atmospheric CO2 levels — «will promote
warming by an extra 15 percent to 78 percent on a century - scale» compared to typical estimates by the U.N.'s Intergovernmental Panel on Climate Change.
The
effect of clouds and cosmic rays probably
amplified this solar
warming.
An increase in glacialquakes signals accelerated melting
of Greenland's glaciers, which both reveals the
effects of global
warming and is expected to contribute to future
warming —
amplifying the consequences in the Arctic region.9
The most likely combined
effect of changes to all cloud types is to
amplify the surface temperature
warming (a positive feedback).
The sun can not be responsible for this particular
warming, irrespective
of how strongly one wishes to
amplify its
effect.
During a period
of rapid population growth, a lower heat capacity due to drying out
of the soil and lost vegetation, and an increase in heat retaining surfaces, then homogenization more often
amplifies those
warming effects that is not indicative
of climate change.
Added methane reduces heat radiation to space,
amplifying the
warming effect of carbon dioxide produced by burning fossil fuels.
For example, the atmospheric
warming due to increased CO2 might well be expected to increase water evaporation so as to keep Relative Humidity constant (albeit raising Specific Humidity), so
amplifying the small
warming effect of CO2 itself.
The runaway greenhouse
effect has several meanings ranging from, at the low end, global
warming sufficient to induce out -
of - control
amplifying feedbacks, such as ice sheet disintegration and melting
of methane hydrates, to, at the high end, a Venus - like hothouse with crustal carbon baked into the atmosphere and a surface temperature
of several hundred degrees, a climate state from which there is no escape.
If water vapor has an
amplifying effect as climate modelers claim, why is the daily mean temperature in a dry, desert area
warmer (in spite
of nighttime cooling) than a humid tropical area at the same latitude?
«As the high latitudes
warm faster than the mid-latitudes because
of amplifying effects of melting ice, the west - to - east jet - stream wind is weakened.
This feedback system is confirmed by the CO2 record — in the past, the
amplifying effect of CO2 feedback enabled
warming to spread across the globe and take the planet out
of the ice age.
... very few scientists close to the problem, when asked the specific question, would say that they are 95 per cent sure that the
effect of clouds is to
amplify rather than to reduce the
warming effect of increasing carbon dioxide.
Recently there have been some studies and comments by a few climate scientists that based on the slowed global surface
warming over the past decade, estimates
of the Earth's overall equilibrium climate sensitivity (the total amount
of global surface
warming in response to the increased greenhouse
effect from a doubling
of atmospheric CO2, including
amplifying and dampening feedbacks) may be a bit too high.
Moreover, remember that the
effect of CO2 and the other greenhouse gases is to
amplify the sun's
warming.
Past interglacial
warming were triggered by sharp spikes in solar irradiation associated with the Earth's position relative to the sun (Milankovic cycles), with consequent feedback release
of greenhouse gas (CO2, CH4) from the oceans and the biosphere, resulting in atmospheric infrared radiation
effects and in melting
of ice sheets, which
amplify global
warming.
Because the basics
of anthropogenic global
warming are fairly straightforward — CO2 is a greenhouse gas, because
of the lapse rate water vapor condenses or freezes out in the troposphere and acts mainly to
amplify the
effect of CO2, humans are burning a lot
of fossil C and increasing the CO2 in the atmosphere, the surface
of the earth is
warming, the cryosphere is retreating, the climate that supports civilization is rapidly changing, and consequently we are facing an uncertain future — but the details are complex, it's easy to «misunderestimate» the way climate works in detail.
A pattern emerging from recent paleoclimatologic studies suggests that the climatic
effects of eccentricity, precession, and axial tilt have been
amplified during cool phases
of the Cenozoic, whereas they have been dampened during
warm phases.
Yes, certain
effects can reasonably be said to
amplify warming (ice albedo is probably one
of them) but there must exist negative feedbacks that tend to damp out temperature movements.
Shifts in climate can be exponential, abrupt and massive due to «feedbacks,» which can
amplify and diminish the
effects of global
warming.