RollingThunder
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- Mar 22, 2010
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Probably not much. Why would you assume that anything had to have changed. Some particulates, aerosols and gases can still rise high enough to have a cooling effect and the black carbon soot still settles out on top of snow and ice and causes them to melt. Nothing has significantly changed about that.BUT TODAY --- particulates from newly industrialized China are responsible for a COOLING EFFECT and masking the CO2 warming trend.. Cooling effects from volcanoes are ALWAYS blamed on particulates aren't they??
Arguing from ignorance always makes you look stupid. Of course, in your case, fecalhead, you are stupid.
Volcanoes produce a variety of effects on the Earth and its climate, not just one. Volcanoes shoot a lot of particulates, aerosols and gases into the stratosphere where the ash particulates cause a cooling effect and the sulfuric gases, after combining with water droplets to form tiny sulfuric acid droplets, cause an even greater cooling effect, by reflecting sunlight back into outer space. Industrial emissions can have a similar effect, particularly if they contain a lot of sulfates from coal burning power plants.
Volcanoes also produce a lot of black carbon soot that absorbs sunlight and can cause a slight warming effect in upper atmosphere and also settles out on the surface of the Earth. When black carbon soot settles on snow or ice, it changes the albedo and causes a melting effect. Industrial black soot has a similar effect. So volcanoes can have both a cooling effect, that lasts a few years before the ash and sulfuric acid droplets settle out of the atmosphere, and an ice melting effect that can last even longer. Scientists now think that a large part of the current melting of glaciers in the Himalayas is being caused by deposited layers of black carbon soot from Chinese and Indian industrialization, in addition to the increased temperatures caused by global warming from the increased levels of CO2.
THE INFLUENCE OF VOLCANIC ERUPTIONS ON THE OZONE, GREENHOUSE, AND HAZE EFFECTS
(Excerpts)
THE GREENHOUSE EFFECT:
Certain gases, called greenhouse gases (primarily carbon dioxide and water vapor; but also methane, N2O, and CFCs), allow short wavelength radiation from the sun (UV and visible light) to penetrate through the lower atmosphere to the earth's surface. These same gases, however, absorb long wavelength radiation (infrared), which is the energy the earth reradiates back into space. The trapping of this infrared heat energy by these greenhouse gases results in global warming. Global warming has been evident since the beginning of the Industrial Revolution. Most scientists attribute global warming to the release of greenhouse gases through the burning of fossil fuels.
THE HAZE EFFECT:
Suspended particles, such as dust and ash, can block out the earth's sunlight, thus reducing solar radiation and lowering mean global temperatures. The haze effect often generates exceptionally red sunsets due to the scattering of red wavelengths by submicron-size particles in the stratosphere and upper troposphere.
INFLUENCE ON THE GREENHOUSE EFFECT:
Volcanic eruptions can enhance global warming by adding CO2 to the atmosphere. However, a far greater amount of CO2 is contributed to the atmosphere by human activities each year than by volcanic eruptions. T.M.Gerlach (1991, American Geophysical Union) notes that human-made CO2 exceeds the estimated global release of CO2 from volcanoes by at least 150 times. The small amount of global warming caused by eruption-generated greenhouse gases is offset by the far greater amount of global cooling caused by eruption-generated particles in the stratosphere (the haze effect). Greenhouse warming of the earth has been particularly evident since 1980. Without the cooling influence of such eruptions as El Chichon (1982) and Mt. Pinatubo (1991), described below, greenhouse warming would have been more pronounced.
INFLUENCE ON THE HAZE EFFECT:
Volcanic eruptions enhance the haze effect to a greater extent than the greenhouse effect, and thus they can lower mean global temperatures. It was thought for many years that the greatest volcanic contribution of the haze effect was from the suspended ash particles in the upper atmosphere that would block out solar radiation. However, these ideas changed in the 1982 after the eruption of the Mexican volcano, El Chichon. Although the 1980 eruption of Mt. St. Helens lowered global temperatures by 0.1OC, the much smaller eruption of El Chichon lowered global temperatures three to five times as much. Although the Mt. St. Helens blast emitted a greater amount of ash in the stratosphere, the El Chichon eruption emitted a much greater volume of sulfur-rich gases (40x more). It appears that the volume of pyroclastic debris emitted during a blast is not the best criteria to measure its effects on the atmosphere. The amount of sulfur-rich gases appears to be more important. Sulfur combines with water vapor in the stratosphere to form dense clouds of tiny sulfuric acid droplets. These droplets take several years to settle out and they are capable to decreasing the troposphere temperatures because they absorb solar radiation and scatter it back to space.
PINATUBO (1991) -- Mt. Pinatubo erupted in the Philippines on June 15, 1991, and one month later Mt. Hudson in southern Chile also erupted. The Pinatubo eruption produced the largest sulfur oxide cloud this century. The combined aerosol plume of Mt. Pinatubo and Mt. Hudson diffused around the globe in a matter of months. The data collected after these eruptions show that mean world temperatures decreased by about 1 degree Centigrade over the subsequent two years. This cooling effect was welcomed by many scientists who saw it as a counter-balance to global warming.
You didn't address my question.. What has CHANGED in the content of industrial particulates since 1800s??
Nothing, moron. They still cause cooling. I described all this in the post you are quoting. You're just too damn retarded to comprehend what is right in front of you.And what has CHANGED in the output of volcanoes to make them NOT agents of cooling..
You're off on some insane tangent that doesn't have anything to do with reality or anything that I've said in this debate. Try actually reading other people's posts if you want to keep up.Youre off on some tangent that doesn't have anything to do with my observation..
It says right there in your MASSIVELY arrogant font-rant..
Industrial emissions can have a similar effect, particularly if they contain a lot of sulfates from coal burning power plants.
What was soot and particulates a more effective glacier killer in the 1800s MORE than it is today? Especially if TODAY --- you are crediting particulates as a powerful coolant effect.
Whoever said that nonsense? Black carbon soot and ash that settle out on the surface are still helping to melt glaciers today just like they were a century or so ago (or always really). Sulfuric acid droplets and ash in the stratosphere are still causing a cooling effect that persists for several years, just like they always have. As I said in my post: "Scientists now think that a large part of the current melting of glaciers in the Himalayas is being caused by deposited layers of black carbon soot from Chinese and Indian industrialization, in addition to the increased temperatures caused by global warming from the increased levels of CO2."
It's really a shame that you're too retarded to understand this, fecalhead.