Sentences with phrase «feedback effects like»

Among the effects could be more frequent, extreme weather events and droughts, rapid sea level rise from icecap melting, breakdown of the marine food chain and worst of all, feedback effects like large releases of methane from thawing permafrost, or large scale dieback of forests.

When you have feedback effects like this, you're going to get instability in your model economy, and that's exactly what the authors find — the economy experiences booms and busts in a chaotic, unstable way.

Not exact matches

Extra carbon dioxide means a warmer world — and then positive feedback effects from things like water vapour and ice loss will make it warmer still

This positive feedback phenomenon, called the runaway albedo effect, would eventually lead to a single dominating ice cap, like the one observed on Pluto.

Basically we wanted to do the same thing at the system level, by characterizing what each cortical area does, and then hooking them together with the feedback in the model to try to understand top - down effects like attention.

Elisabeth Kruegar, Helmholtz Centre for Environmental Research (UFZ): «The World Water Scenarios Initiative can help raise awareness about where our behavior is leading to, and can also help to compare trends and different aspects of global change, like the drivers that they identified have an effect on water, and also how water has an effect on the drivers, the feedback between both the drivers and impacts are important.

Absent understanding of cloud feedback processes, the best you can really do is mesh it into the definition of the emergent climate sensitivity, but I think probing (at least some of) the uncertainties in effects like this is one of the whole points of these ensemble - based studies.

According to Hattie, teacher subject - matter knowledge had an effect size of 0.19, meaning that it was far less effective than other factors like classroom management (0.52) or effective teacher feedback (0.75).

In terms of measured effect sizes, feedback, remediation, and direct or explicit instruction are more effective in promoting student achievement than problem - based learning, inductive teaching, inquiry - based teaching and the like.

The instructional effect of feedback in test - like events.

The most remarkable sonic manifestation was when the acoustical mixture of the bird calls and speaker feedback generated a heterodyne effect, a phenomenon that created phantom twitterings that seemed to originate inside my head and swirl around it like a localized tornado of sound.

[Response: These feedbacks are indeed modelled because they depend not on the trace greenhouse gas amounts, but on the variation of seasonal incoming solar radiation and effects like snow cover, water vapour amounts, clouds and the diurnal cycle.

But it could be even worse — with the GHG feedback added in, the full response from the paleoclimate effects looks like it could multiply the IPCC estimates by a factor of 4 to 6.

Re 9 wili — I know of a paper suggesting, as I recall, that enhanced «backradiation» (downward radiation reaching the surface emitted by the air / clouds) contributed more to Arctic amplification specifically in the cold part of the year (just to be clear, backradiation should generally increase with any warming (aside from greenhouse feedbacks) and more so with a warming due to an increase in the greenhouse effect (including feedbacks like water vapor and, if positive, clouds, though regional changes in water vapor and clouds can go against the global trend); otherwise it was always my understanding that the albedo feedback was key (while sea ice decreases so far have been more a summer phenomenon (when it would be warmer to begin with), the heat capacity of the sea prevents much temperature response, but there is a greater build up of heat from the albedo feedback, and this is released in the cold part of the year when ice forms later or would have formed or would have been thicker; the seasonal effect of reduced winter snow cover decreasing at those latitudes which still recieve sunlight in the winter would not be so delayed).

So feedbacks like reduced ocean capacity, changes due to landuse etc. might effect our ability to predict future CO2 levels for a given anthropogenic input, but they are irrelevant to the sensitivity of T to actual CO2 concentration.

A clear answer to the question, and to the question of how much of the observed cooling is due to the above direct effect of the forcings, and how much is due to feedbacks, like the conversion of CH4 in the stratosphere to H20 etc. would be welcome?

(Maybe there's some hope for a super lake snow effect (like in Moscow winter 2012/13) and the feedback gets a wee bit less catastrophic.)

So your scientific intuition rebels at the thought of runaway positive feedback (like that which causes the rapid transition from ice age to interglacial which is so well established), but it doesn't rebel at the thought that somehow, every scientist since 1922 has failed to notice an allegedly major flaw in our understanding of the greenhouse effect?

Steve is an admitted lukewarmer (as Jan says a better description is required) and adamant anti-AGW catastrophist who believes the Miscolczian - like - ve feedback of blooms in their various configurations not only mitigate CO2 effect but have causal correlation with ENSO.

This would imply that feedback actually works to reduce the net effect of greenhouse warming, from a sensitivity of 1.2 to one something like 0.6 C per doubling.

BBD, As relieved as we are a devout «believer» such as yourself is finally stumbling towards a grasp of the basic principles of radiative physics etc, you need to now start thinking about joining the adult discussions on vastly less clear problems like the * size * of the AGW effect of AGW compared to natural forces, feedbacks etc..

On the face of it, for the layman, temperature rises causing CO2 to come out of the ocean, with no feedback effect, seems like a perfectly reasonable explanation.

(a) only CO2 + water vapour feedback effects can account for the majority of this rise (and that it can be separated from noise and natural processes like ENSO, PDO, cloud cover etc);

Or is the Earth's climate an exception to most other physical processes, is it in fact dominated by positive feedback effects that, like the sudden acceleration in grandma's car, apparently rockets the car forward into the house with only the lightest tap of the accelerator?

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.

It is intellectually dishonest to devote several pages to cherry - picking studies that disagree with the IPCC consensus on net health effects because you don't like its scientific conclusion, while then devoting several pages to hiding behind [a misstatement of] the U.N. consensus on sea level rise because you know a lot reasonable people think the U.N. wildly underestimated the upper end of the range and you want to attack Al Gore for worrying about 20 - foot sea level rise.On this blog, I have tried to be clear what I believe with my earlier three - part series: Since sea level, arctic ice, and most other climate change indicators have been changing faster than most IPCC models projected and since the IPCC neglects key amplifying carbon cycle feedbacks, the IPCC reports almost certainly underestimate future climate impacts.

Most of the warming in climate models is not from CO2 directly but from feedback effects, and the evidence for strong positive climate feedback on temperature is very weak (to the point of non-existence) as compared to the evidence of greenhouse gas warming (yes, individual effects like ice cover melting are undeniably positive feedback effects, the question is as to the net impact of all such effects).

It all starts with a small trigger (whatever the cause), that is fortified by responses which are strong positive feedbacks, but limited (self limiting, like ice sheets in the case of ice ages) in total effect.

Also, the amount of energy converted from solar to chemical energy will be a small effect compared to the reduction in greenhouse warming resulting from taking CO2 out of the atmosphere (much like burning coal doesn't release much energy compared to the increase in greenhouse effect warming), so you don't even have the right negative feedback.

For example, the argument that follows very substantially from the extent of continental shelf that there is within the Arctic Basin and, therefore, the particular relationship that warming on that relatively shallow sea has on trapped methane - for example, the emergence of methane plumes in that continental shelf, apparently in quite an anomalous way - leading possibly to the idea that there may be either tipping points there or catastrophic feedback mechanisms there, which could then have other effects on things, such as more stabilised caps like the Greenland ice cap and so on.

Eventually other earth processes offset these positive feedbacks, stabilizing the global temperature at a new equilibrium and preventing the loss of Earth's water through a Venus - like runaway greenhouse effect.

The forcing aspect of the indirect effect at the top of the atmosphere is discussed in Chapter 2, while the processes that involve feedbacks or interactions, like the «cloud lifetime effect» [6], the «semi-direct effect» and aerosol impacts on the large - scale circulation, convection, the biosphere through nutrient supply and the carbon cycle, are discussed here.

Topics that I work on or plan to work in the future include studies of: + missing aerosol species and sources, such as the primary oceanic aerosols and their importance on the remote marine atmosphere, the in - cloud and aerosol water aqueous formation of organic aerosols that can lead to brown carbon formation, the primary terrestrial biological particles, and the organic nitrogen + missing aerosol parameterizations, such as the effect of aerosol mixing on cloud condensation nuclei and aerosol absorption, the semi-volatility of primary organic aerosols, the importance of in - canopy processes on natural terrestrial aerosol and aerosol precursor sources, and the mineral dust iron solubility and bioavailability + the change of aerosol burden and its spatiotemporal distribution, especially with regard to its role and importance on gas - phase chemistry via photolysis rates changes and heterogeneous reactions in the atmosphere, as well as their effect on key gas - phase species like ozone + the physical and optical properties of aerosols, which affect aerosol transport, lifetime, and light scattering and absorption, with the latter being very sensitive to the vertical distribution of absorbing aerosols + aerosol - cloud interactions, which include cloud activation, the aerosol indirect effect and the impact of clouds on aerosol removal + changes on climate and feedbacks related with all these topics In order to understand the climate system as a whole, improve the aerosol representation in the GISS ModelE2 and contribute to future IPCC climate change assessments and CMIP activities, I am also interested in understanding the importance of natural and anthropogenic aerosol changes in the atmosphere on the terrestrial biosphere, the ocean and climate.

Frequently, Dr. Kahn provides an innovative and extremely effective procedure for couples by recommending that either one or both partners join his own separate relationally focused group where that person can receive support and understanding, learn techniques of positive interaction, become thoughtful of the effect of his words and behaviors on others, receive feedback from others who are not their spouse (but may be like their spouse), have an opportunity to practice the couples dialogue with the group person who reminds them of their spouse and thereby develop empathy for their spouse.