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Changes in Tropospheric Composition and Air Quality by X. Tang; S. Madronich; T. Wallington; D. Calamari is a Medicine article available to read on EtoBox.

What is Changes in Tropospheric Composition and Air Quality about?

Reductions in stratospheric ozone (0,) cause increased penetration of ultraviolet-B (UV-B) radiation to the troposphere, and therefore increases in the chemical activity in the lower atmosphere (the troposphere). Tropospheric ozone levels are sensitive to local concentrations of nitrogen oxides (NOx) and hydrocarbons. Model studies suggest that additional UV-B radiation reduces tropospheric ozone in clean environments (low NOx), and increases tropospheric ozone in polluted areas (high NOx) Assuming other factors remain constant, additional W-B will increase the rate at which primary pollutants are removed from the troposphere. Increased UV-B is expected to increase the concentration of hydroxyl radicals (OH) and result in faster removal of pollutants such as carbon monoxide (CO), methane (C&), nonmethane hydrocarbons (NMHCs), sulfur and nitrogen oxides, hydrochlorofluorocarbons ( HCFCs), and hydrofluorocarbons (HFCs). Concentrations of peroxy radicals (both inorganic and organic) are expected to increase, leading to higher atmospheric levels of hydrogen peroxide (H,O,) and organic peroxides. The effects of UV-B increases on tropospheric 0,. OH, methane, CO, and possibly other tropo

Who reads Changes in Tropospheric Composition and Air Quality?

Author

X. Tang; S. Madronich; T. Wallington; D. Calamari

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1011-1344)

Published

1998

Language

EN

Field

Medicine (Physical Sciences)