Tuesday, March 9, 2010

pollution.

Forever Not harmful pollution.
We've all heard that the levels of carbon dioxide and the gas-greenhouse gases in the atmosphere continues - canal increased. These gases binding energy of the sun and led to increased global temperature. But a new study shows that some kinds of air pollutants change the chemical composition of clouds, so these clouds reflect more sunlight into space than to the earth. This phenomenon may reduce the effects of global warming caused by greenhouse gases.

Robert Charlson, an atmospheric kimiwan from the University of Washington, said that the aerosol (which the particles are so small they constantly stay in the atmosphere) of industrial pollution affects the composition of clouds. In collaboration with scientists from Consilio Nazionale delle Ricerche, he analyzes a cloud over the Po River Valley, an industrial area in Northern Italy. The researchers took samples of water from a lot of clouds and water vapor, in an attempt to reverse the process of cloud formation.

When the Charlson and his colleagues have analyzed the clouds evaporated, they found that the surface tension of water titik2 reduced by 30% compared to the value of water pressure in general. Surface pressure is the force which attract water molecules to the center, away from the surface. In water, hydrogen atoms are negatively charged and positively charged oxygen atom. This led to a strong attractive force between hydrogen and oxygen, which causes the water molecules attached to each other more than with other molecules.

At other molecules, such as air pollutants, mixed with water, they interfere with some of these hydrogen bonds and lead to reduction in surface pressure. In the process of cloud formation, surface pressure is relatively smaller this caused more water points are established, but in a smaller size. The scientists calculated that 30% reduction in surface pressure can produce 20% more water points and reduce the size of the water point as much as 6%

Charlson compare this situation with a mix of water and sugar with water and detergent mix. When sugar is added to a bottle of water, there will be no bubbles are formed, even if we add the sugar in a large number and shake it. But just by adding a few drops of detergent can make a bottle filled with foam. Try it at home and you will be able to see how the lights reflect on each foam. Some air pollutants have properties such as sugar, while others act like detergents.

According to Charlson and colleagues, increasing the number of water droplets in clouds, the sun can cause 1% more reflected away from Earth. It is important to remember that the aerosols, but can reduce the effects of greenhouse gases, can also alter the basic chemical composition of the atmosphere. NASA mission scheduled for 2003 will be studied in detail and the atmosphere is expected to provide clues on how aerosols affect climate change.

Forever Not harmful pollution.
We've all heard that the levels of carbon dioxide and the gas-greenhouse gases in the atmosphere continues - canal increased. These gases binding energy of the sun and led to increased global temperature. But a new study shows that some kinds of air pollutants change the chemical composition of clouds, so these clouds reflect more sunlight into space than to the earth. This phenomenon may reduce the effects of global warming caused by greenhouse gases.

Robert Charlson, an atmospheric kimiwan from the University of Washington, said that the aerosol (which the particles are so small they constantly stay in the atmosphere) of industrial pollution affects the composition of clouds. In collaboration with scientists from Consilio Nazionale delle Ricerche, he analyzes a cloud over the Po River Valley, an industrial area in Northern Italy. The researchers took samples of water from a lot of clouds and water vapor, in an attempt to reverse the process of cloud formation.

When the Charlson and his colleagues have analyzed the clouds evaporated, they found that the surface tension of water titik2 reduced by 30% compared to the value of water pressure in general. Surface pressure is the force which attract water molecules to the center, away from the surface. In water, hydrogen atoms are negatively charged and positively charged oxygen atom. This led to a strong attractive force between hydrogen and oxygen, which causes the water molecules attached to each other more than with other molecules.

At other molecules, such as air pollutants, mixed with water, they interfere with some of these hydrogen bonds and lead to reduction in surface pressure. In the process of cloud formation, surface pressure is relatively smaller this caused more water points are established, but in a smaller size. The scientists calculated that 30% reduction in surface pressure can produce 20% more water points and reduce the size of the water point as much as 6%

Charlson compare this situation with a mix of water and sugar with water and detergent mix. When sugar is added to a bottle of water, there will be no bubbles are formed, even if we add the sugar in a large number and shake it. But just by adding a few drops of detergent can make a bottle filled with foam. Try it at home and you will be able to see how the lights reflect on each foam. Some air pollutants have properties such as sugar, while others act like detergents.

According to Charlson and colleagues, increasing the number of water droplets in clouds, the sun can cause 1% more reflected away from Earth. It is important to remember that the aerosols, but can reduce the effects of greenhouse gases, can also alter the basic chemical composition of the atmosphere. NASA mission scheduled for 2003 will be studied in detail and the atmosphere is expected to provide clues on how aerosols affect climate change.

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