Acid rain, or acid deposition, is a broad term that includes any form of precipitation with acidic components, such as sulfuric or nitric acid that fall to the ground from the atmosphere in wet or dry forms.
This can include rain, snow, fog, hail or even dust that is acidic. Acid rain results when sulfur dioxide SO 2 and nitrogen oxides NO X are emitted into the atmosphere and transported by wind and air currents.
These then mix with water and other materials before falling to the ground. While a small portion of the SO 2 and NO X that cause acid rain is from natural sources such as volcanoes, most of it comes from the burning of fossil fuels. Winds can blow SO 2 and NO X over long distances and across borders making acid rain a problem for everyone and not just those who live close to these sources.
Keep scrolling for more. Equinox and the Seasons Equinox descends from aequus , the Latin word for "equal," and nox , the Latin word for "night"—a fitting history for a word that describes days of the year when the daytime and nighttime are equal in length. First Known Use of equinox 14th century, in the meaning defined at sense 1. Learn More about equinox. Time Traveler for equinox The first known use of equinox was in the 14th century See more words from the same century.
From the Editors at Merriam-Webster. What Does 'Equinox' Mean? Dictionary Entries near equinox equinoctial point equinoctial tide equinoctial year equinox equip equipage equipartition See More Nearby Entries. Style: MLA. English Language Learners Definition of equinox. Kids Definition of equinox. Comments on equinox What made you want to look up equinox? Get Word of the Day daily email! When these gases are discharged into the atmosphere, they react with the water, oxygen, and other gases already present there to form sulfuric acid, ammonium nitrate, and nitric acid.
These acids then disperse over large areas because of wind patterns and fall back to the ground as acid rain or other forms of precipitation. As such, man-made acid deposition began becoming a significant issue during the Industrial Revolution and was first discovered by a Scottish chemist Robert Angus Smith in In that year, he discovered the relationship between acid rain and atmospheric pollution in Manchester, England.
Although it was discovered in the s, acid deposition did not gain significant public attention until the s, and the term "acid rain" was coined in Public attention further increased in the s when the "New York Times" published reports about problems occurring in the Hubbard Brook Experimental Forest in New Hampshire.
Aquatic settings are the most clearly affected by acid deposition, however, because acidic precipitation falls directly into them. Both dry and wet deposition also runs off from forests, fields, and roads and flows into lakes, rivers, and streams.
As this acidic liquid flows into larger bodies of water, it is diluted. Howvever, over time, acids can accrue and lower the overall pH of the body of water. Acid deposition also causes clay soils to release aluminum and magnesium , further lowering the pH in some areas. DJ lighting. DJ spare parts. Computer accessories. Studio equipment. Drum machines. Studio headphones. Digital recorders. Guitar accessories. Studio accessories. GBP My Language. Wishlist Log in to view your wishlist.
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