Sentences with phrase «black soot on»

Black soot on multiyear ice is a player in albedo space because, unlike water, it's albedo remains low regardless of sun low on the horizon or not.

Besides emissions of greenhouse gases, humans are constantly changing their environment which does have an impact (e.g. turning a corn field into an asphalt parking lot or massive deforestation in the world's major tropical rainforests or laying down a carpet of black soot on ice sheets).

The UN was so concerned about man - made Global Cooling during the 1970's that they wanted to melt the Arctic by spreading black soot on it:

The carefully edited selection of work from 1958 to 2012 includes her early use of a welding blowtorch to deposit velvety layers of black soot on paper, muslin, and canvas.

Not exact matches

The fact that the city's bus fleet still depends on diesel, Artaxo warned, creates an even worse health hazard in the shape of emissions of black carbon, one of the main components of soot and a pollutant that contributes to global warming.

«Reductions of methane and black carbon (soot) would likely have only a modest impact on near - term global climate warming,» the authors at the U.S. Department of Energy's Pacific Northwest National Laboratory wrote.

Black carbon warms the atmosphere because of its ability to absorb radiation from the sun, but its effect can be especially pernicious in polar regions, where, falling on bright ice, the soot diminishes the regions» ability to reflect away heat.

One high - profile target, he says, should be reducing emissions of tiny soot particles, known as black carbon, that don't last long in the atmosphere but have an outsize impact on warming.

I guess I am surprised that with better understanding of the importance of water vapor feedback, sulfate aerosols, black carbon aerosols, more rapid than expected declines in sea ice and attendant decreases in albedo, effects of the deposition of soot and dust on snow and ice decreasing albedo, and a recognition of the importance of GHGs that were probably not considered 30 years ago, that the sensitivity has changed so little over time.

Whereas organic carbon particles have a cooling effect, black carbon, also known as soot, has a warming effect on the climate.

Increase of Earth's energy imbalance from reduction of particulate air pollution, which is needed for the sake of human health, can be minimized via an emphasis on reducing absorbing black soot [75], but the potential to constrain the net increase of climate forcing by focusing on black soot is limited [76].

The whitening paste is actually a black / gray charcoal paste that you rub all over your teeth so it looks like you chomped down on some soot.

The opening lines of Stephen Sondheim «Äôs macabre musical may be missing, but our introduction to the gruesome, grimy streets of London still retains a distinctive visual flair; saturated in soot and scum, Tim Burton's take on the Demon Barber of Fleet Street borders on graphic novel, oozing with oil - black humour.

We can't imagine Pussy Galore or Domino Derval being turned on by black soot and backfires, but the way the DB5 drives still charms.

The Cons: cheap interior (Trim on the steering wheel is peeling), the Bluetooth is (awful had to get it replaced once and people always complain it is hard to hear), Black soot is present in the exhaust pipes (Since Day 1 and I have seen other Azeras with the same issue) and the BIGGEST CON..

Otto Piene 3 Black Flowers, 1967 pigment and soot on board 26 7/8 x 37 5/8 inches (68,3 x 95,6 cm) 30 3/4 x 41 3/8 inches (78 x 105 cm) frame Private Collection

What impact, if any, does soot and black carbon from fires have on the glaciers of Kilimanjaro?

I guess I am surprised that with better understanding of the importance of water vapor feedback, sulfate aerosols, black carbon aerosols, more rapid than expected declines in sea ice and attendant decreases in albedo, effects of the deposition of soot and dust on snow and ice decreasing albedo, and a recognition of the importance of GHGs that were probably not considered 30 years ago, that the sensitivity has changed so little over time.

black soot has also been found by a recent university of california study to be the direct cause of the albedo warming effect on the otherwise highly reflective and pristine white arctic ice & snow.

It's good old fashioned black carbon soot — a visible pollutant with measurable effects on human health both in poor places, where it comes from cooking or heating using coal, firewood or dung, and rich countries, where it is produced mainly through the combustion of diesel and similar fuels and from some industries.

Since, on average, aerosols have a cooling effect (although some absorbing aerosols like black carbon (soot) are actually adding to global warming), reducing current aerosol levels (particularly sulphates) is equivalent to an extra warming effect.

Alternative, more indirect, but not for that reason ultimately not effective approaches must be developed, including «demonstration» projects which show that people working together an have a positive effect on certain contributors to warming, including black soot produced by millions of stoves that use dung for fuel.

These forcings are spatially heterogeneous and include the effect of aerosols on clouds and associated precipitation [e.g., Rosenfeld et al., 2008], the influence of aerosol deposition (e.g., black carbon (soot)[Flanner et al. 2007] and reactive nitrogen [Galloway et al., 2004]-RRB-, and the role of changes in land use / land cover [e.g., Takata et al., 2009].

And, our work on reducing black carbon, or soot, will decrease the rate of snow and ice melt in the Arctic.

Black carbon - Operationally defined aerosol species based on measurement of light absorption and chemical reactivity and / or thermal stability; consists of soot, charcoal and / or possible light absorbing refractory organic matter.

But as the snow melts in the spring and summer the black soot concentrations on the glacier surface increase, because the soot particles do not escape in the melt water as efficiently as the water itself.

At Zuoqiupu glacier — a bellwether site on the southern edge of the plateau and downwind from the Indian subcontinent — black soot deposition increased by 30 percent between 1990 and 2003.

This is extreme wishful thinking on their part since recent research finds black soot as being the major factor for polar sea ice loss.

Judith - Apart from the general anthro vs. natural disussion of sea ice, I'm always wondering: has anyone seriously considered / studied the possible anthropogenic contribution from NON-CO2 sources (black carbon soot / aerosol deposits on the ice surface, increasing the albedo, melting the ice faster in the sun)?

The expert, Dr. James E. Hansen, and his colleagues conclude in a new analysis that the warming seen in recent decades has been caused mainly by other heat - trapping emissions — methane, chlorofluorocarbons, black particles of diesel and coal soot and compounds that create the ozone in smog — which are easier to control than carbon dioxide, with many of them already on the decline.

There followed speculation on possible ways of combating this catstrophic cooling, like blowing polar ice up with nuclear energy or covering sea with «black soot».

Whereas organic carbon particles have a cooling effect, black carbon — also known as soot — has a warming effect on the climate.

Increase of Earth's energy imbalance from reduction of particulate air pollution, which is needed for the sake of human health, can be minimized via an emphasis on reducing absorbing black soot [75], but the potential to constrain the net increase of climate forcing by focusing on black soot is limited [76].

Looking at the journals of the first scientific Arctic explorer - Scoresby - he made comments about the amount of black soot lying on the ice / snow and melting it.

You will see other comments about the role of black soot, something that dr Hansen has written on.

When I return I look forward to reading your replies about my other queries on Black Soot and likely co2 concentrations by 2100.

Environment Ministers from states bordering the Arctic have called for urgent action on short lived climate pollutants (SLCP) such as methane, HFCs and black carbon soot.

It's a problem for the climate because the black soot particles are just the right color to absorb heat from the sun, either in the upper atmosphere or when it settles back down to earth on Arctic snow and ice (when soot - free, the polar ice caps reflect a tremendous amount of light and heat back into Space, helping keep the planet cool).

As the environmental ministers of the Arctic nations, including the United States, meet in Sweden next week, they have an opportunity to show leadership on an important though less well - known climate pollutant, black carbon (soot).

For instance, Bond et al. report that black carbon aerosol, or soot, is second only to carbon dioxide as the substance emitted by human activity that has the greatest warming influence on the climate — contributing a quarter (or perhaps even a bit more) to the current overall anthropogenic warming effect.

«Belching from smokestacks, tailpipes and even forest fires, soot — or black carbon — can quickly sully any snow on which it happens to land.

Other impacts of human civilization, such as deforestation and other changes to land use, pollution and black soot landing on Arctic snows also contribute to warming.

More on the important role that black carbon soot plays in increasing global warming and what can be done about it: A new study published in Nature Geoscience found that the amount of solar radiation absorbed increased as the ratio of black carbon to sulphate rose.

Black carbon, a component of soot, and potentially one of the most important contributors to climate change, rises into the atmosphere each time someone fires up a traditional cook - stove or switches on an older - model diesel vehicle.

«One of the most potent «short - lived climate forcers» in diesel emissions is black carbon, or soot,» says Corbett, who is on the faculty of UD's College of Earth, Ocean, and Environment.

Read the original: Glacial loss on Kilimanjaro continues unabated Glacial Melting Black Soot Coating Himalayan Glaciers is Accelerating Melting Global Warming Melting Glaciers, Shrinking Harvests in China and India Antarctica's Pine Island Glacier Melting Four Times Faster Than 10 Years Ago

Using the WRF - chem model, the team first examined how much soot in the form of so - called black carbon would land on snow in the Sierra Nevada, Cascade and Rocky Mountains.

We also emit conventional pollution, causing black soot and aerosols that have differing (and debated) effects on climate.