Influence of modelled soil biogenic NO emissions on related trace gases and the atmospheric oxidizing efficiency

The emission of nitric oxide (NO) by soils (SNOx) is an important source of oxides of nitrogen (NO<sub>x</sub>=NO+NO<sub>2</sub>) in the troposphere, with estimates ranging from 4 to 21 Tg of nitrogen per year. Previous studies have examined the influence of SNOx on ozone (O<sub>3</sub>) chemistry. We employ the ECHAM5/MESSy atmospheric chemistry model (EMAC) to go further in the reaction chain and investigate the influence of SNOx on lower tropospheric NO<sub>x</sub>, O<sub>3</sub>, peroxyacetyl nitrate (PAN), nitric acid (HNO<sub>3</sub>), the hydroxyl radical (OH) and the lifetime of methane (τ<sub>CH<sub>4</sub></sub>). We show that SNOx is responsible for a significant contribution to the NO<sub>x</sub> mixing ratio in many regions, especially in the tropics. Furthermore, the concentration of OH is substantially increased due to SNOx, resulting in an enhanced oxidizing efficiency of the global troposphere, reflected in a ~10% decrease in τ<sub>CH<sub>4</sub></sub> due to soil NO emissions. On the other hand, in some regions SNOx has a negative feedback on the lifetime of NO<sub>x</sub> through O<sub>3</sub> and OH, which results in regional increases in the mixing ratio of NO<sub>x</sub> despite lower total emissions in a simulation without SNOx. In a sensitivity simulation in which we reduce the other surface NO<sub>x</sub> emissions by the same amount as SNOx, we find that they have a much weaker impact on OH and τ<sub>CH<sub>4</sub></sub> and do not result in an increase in the NO<sub>x</sub> mixing ratio anywhere

Colorado Native Plant Society Newsletter, Vol. 4 No. 5, September-October 1980

https://epublications.regis.edu/aquilegia/1164/thumbnail.jp

Colorado Native Plant Society Newsletter, Vol. 7 No. 3, May-June 1983

https://epublications.regis.edu/aquilegia/1167/thumbnail.jp

Colorado Native Plant Society Newsletter, Vol. 5 No. 1, January-March 1981

https://epublications.regis.edu/aquilegia/1156/thumbnail.jp

Colorado Native Plant Society Newsletter, Vol. 8 No. 3, May-June 1984

The Colorado Native Plant Society Newsletter will be published on a bimonthly basis. The contents will consist primarily of a calendar of events, notes of interest, editorials, listings of new members and conservation news. Until there is a Society journal, the Newsletter will include short articles also. The deadline for the Newsletter is one month prior to its release.https://epublications.regis.edu/aquilegia/1020/thumbnail.jp

Colorado Native Plant Society Newsletter, Vol. 5 No. 3, July-September 1981

https://epublications.regis.edu/aquilegia/1158/thumbnail.jp

Colorado Native Plant Society Newsletter, Vol. 4 No. 3, May-June 1980

https://epublications.regis.edu/aquilegia/1153/thumbnail.jp

Colorado Native Plant Society Newsletter, Vol. 4 No. 6, November-December 1980

https://epublications.regis.edu/aquilegia/1155/thumbnail.jp

Colorado Native Plant Society Newsletter, Vol. 6 No. 2, April-June 1982

https://epublications.regis.edu/aquilegia/1161/thumbnail.jp

The immediate impact of the coronavirus disease 2019 (COVID-19) pandemic on burn-out, work-engagement, and surgical training in the Netherlands

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