Sentences with phrase «greaty change albedo»

If there is an equivalent to the iris effect, I would think it would be changing albedo.

For example, the ice age — interglacial cycles that we have been locked in for the past few million years seem to be triggered by subtle changes in the earth's orbit around the sun and in its axis of rotation (the Milankovitch cycles) that then cause ice sheets to slowly build up (or melt away)... which changes the albedo (reflectance) of the earth amplifying this effect.

For instance, increasing cloud cover due to global warming may change the albedo, but this would be a feedback to a larger warming effect, rather than a cooling.

Ice cover changes albedo.

This changes the albedo of the planet significantly, reducing total insolation and resulting in cooling.

My reasoning was that, iirc, black carbon has played an important role in the ice loss by changing albedo.

(while maintaining solar heating, which is actually a hypothetical excercise in part because removing clouds would change the albedo, though albedo could be artificially maintained by other means for the sake of this thought experiment)

Floating ice changes albedo when it melts, not sea level.

For example, the upper portions of most clouds are predominantly ice crystals that change the albedo factor considerably.

In models that include indirect effects, different treatments of the indirect effect are used, including changing the albedo of clouds according to an off - line calculation (e.g., Tett et al., 2002) and a fully interactive treatment of the effects of aerosols on clouds (e.g., Stott et al., 2006b).

Finally, at any given moment the ice tends to hang out where the sun can't reach... and ice increases in those areas don't change the albedo.

Land use change albedo: again, net cooling, but the trend is not as clear — but not large.

It's an approximation, but we should just have a new spherical system with an albedo a bit different from the first one, and it seems to me implausible that a few CO2 ppm added could change the albedo of this entire new system.

Why did Trenberth change the albedo from 107Watts / m ^ 2 in 1997 to 101.9 Watts / m ^ 2 for the 2009 version?

This is a small forcing, but it caused ice to retreat in the north, which changed the albedo.

Doesn't this mean that CO2 is changing the albedo a tiny bit?

They have to interpret innumerable feedback loops, all the convective forces, the evaporation, the winds, the ocean currents, the changing albedo (reflectivity) of Earth's surface, on and on and on.

These algae can change the albedo of snow, affecting the rate of Arctic snowmelt.

We know the vast amount of coal burned by China to produce manufactured goods (that could have been produced user cleaner energy if not for Kyoto) produces huge amounts of carbon soot that can change the albedo.

Svensmark demonstrated the amplification possible from cosmic rays and cloud formation changing the Albedo by more than enough to account for any observed temperature change over the past 150 years and other cycles come into play for the longer period global temperature variations.

The only possibility left is if the variability kicks in a tipping point and changes the albedo (or something similar) to allow more energy into the system, as Pekka is patiently explaining.

He takes climate change to be the norm of things and he accepts that humans are influencing climate through many factors and not just through emissions (e.g. how we change the albedo, the reflectivity, of the Earth's surface).

Jim, the bottom line for me is that for the earth to be in radiative thermal equiibrium with the sun, it has not been demonstrated that any change in chemical composition of the earth or atmosphere is able to affect the equilibrium temperature, providing this does not change albedo.

Supposedly a doubling of CO2 is supposed to produce 3.71 watts / m ^ 2 (5.35 ln (2) = 3.71) and changing the albedo from 30 % to 29 % increases the incoming solar radiatyion by 3.42 watts / m ^ 2 so this could be and is most likely the cause of observed warming.

Just changing the Albedo percentage to a number I believe it was (0.333) and then changing the orange cell to 89 % simulates the surface temperature properly but the troposphere temperature drops to -11.9 C, which is not the way I understand the climate models would simulate it.

This is largely because melting sea ice changes the albedo of high latitude oceans, and to a lesser extent because an inversion prevails at high latitudes, especially in winter, whereas at low latitudes the heating is convectively mixed througout the troposphere.

Recent research has shown that temperature changes in the Arctic are magnified by feedback over and above the effect of changing albedo due to reduced snow and ice cover.

My Bearded dragon changes albedo based on radiation exposure.The same TSI calculation used to derive the 0.07 degrees would clearly give the wrong answer on the average temperature of my lizard.

5 (c) McGraw Hill Ryerson 2007 Albedo and Climate, Making Predictions About Climate Change The albedo at Earth's surface affects the amount of solar radiation that region receives.

This could be CO2 / H2O GHG reinforcement, changing albedo or snow / ice cover, or something else.

An ice sheet teetering on the edge of melting away is going to have a huge response because just a little extra energy changes the albedo.

CO2 changes the albedo of the atmosphere in frequencies that are visible only to snakes and infrared imaging instruments.

Read more: Stanford University Aerosols Also Implicated in Glacier Melting, Changing Weather Patterns Other research examining the effects of soot on melting glaciers and changing weather pattens in South Asia has reached similar conclusions: Beyond increasing atmospheric warming, because the soot coats the surface of the snow and ice it changes the albedo of the surface, allowing it to absorb more sunlight and thereby accelerating melting.

I recall one post on how Earth came out of a snowball, which explanation may be a possibility but then again there may be other explanations (eg., oceanic volcanos splitting in the ice and thereby releasing some water vapour, soot deposits changing albedo, even meteor collision — who knows given the lack of evidence).

Back to Jim: when I first arrived here I believed in AGW based on the papers and books you guys in climate science cite and publish yourselves: more IFR trapping, changing albedo, positive feedbacks, increased W2 forcing, etc..

This black carbon changes the albedo of the ice, causing it to reflect less sunlight and absorb more heat.

If the surface is highly reflective in the infrared, the greenhouse gas could change the albedo owing to its infrared opacity and cause some warming that way, but that is not the greenhouse effect.

Black carbon can have another indirect effect by changing the albedo of snow and ice, but that's not the topic of this post.

It does not allow for negative feedback, for example, as more clouds form changing the albedo.

Not exact matches

They found that in regions where the amount of snowfall was low and any snow that did settle was sublimating away, enough dust would have accumulated to change the surface albedo sufficiently so that the Earth absorbed sunlight and thawed (Journal of Geophysical Research — Atmospheres, DOI: 10.1029 / 2009jd012007, in press).

Their analysis reveals that the conversion of broadleaved forests to coniferous forests caused significant changes in evapotranspiration, the evaporation of water through leaves, and albedo, the amount of solar energy reflected from the Earth back into space.

The study used satellite data to compare summertime changes in Greenland's albedo from 1981 to 2012.

The impact of grain size on albedo — the ratio between reflected and incoming solar radiation — is strong in the infrared range, where humans can't see, but satellite instruments can detect the change.

The boundaries of ancient valley walls are defined by textural and albedo changes and are also associated with lateral river migration.

These factors have decreased the region's albedo, or the fraction of incoming light that Earth reflects back into space — a change that the CERES instruments are able to measure.

A diminishing albedo in Arctic sea ice can be considered both the cause and effect of changes in sea ice.

Scripps graduate student Kristina Pistone and climate scientists Ian Eisenman and Veerabhadran Ramanathan used satellite measurements to calculate Arctic albedo changes associated with the changing sea ice cover.

Pavement albedo affects buildings both directly, by reflecting more or less sunlight to nearby buildings, and indirectly, by changing the outside air temperature.

Virtually ice - free summers in the arctic sea could well arrive by 2030, with troubling implications for accelerated albedo feedback and possibly disruptive changes in the jet stream.

Whilst several methods for counteracting climate change with geoengineering are considered feasible, injecting sulfates or other fine aerosols into the stratosphere, thereby increasing planetary albedo, is a leading contender.