Nox

From Glossary of Meteorology



NOx

Abbreviation for various oxides of nitrogen, including NO (nitric oxide), NO2 (nitrogen dioxide), or N2O (nitrous oxide).

These gaseous pollutants can be transformed in the presence of water to nitric acid HNO3, one of the acids in acid deposition. They are formed anthropogenically inside combustion engines, where the ambient nitrogen N2 and oxygen O2 gases in the atmosphere can react at high temperatures. They are also produced naturally by lightning and by biological activity in soils.
See active nitrogen.


Copyright 2024 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact permissions@ametsoc.org. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.