Journal Article

FZJ-2017-07310

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Global impact of monocyclic aromatics on tropospheric composition

Cabrera-Perez, D. (Corresponding author) ; Taraborrelli, D.FZJ* ; Lelieveld, J. ; Hoffmann, T. ; Pozzer, A.

2017
EGU Katlenburg-Lindau

This record in other databases:  

Please use a persistent id in citations: http://hdl.handle.net/2128/15771  doi:10.5194/acp-2017-928

Abstract: Aromatic compounds are reactive species influencing ozone formation, OH concentrations and organic aerosol formation. An assessment of their impacts on the gas-phase composition at a global scale has been performed using a general circulation atmospheric-chemistry model.Globally, we found a small annual average net decrease (less than 3 %) in global OH, ozone, and NOx mixing ratios when aromatic compounds are included in the chemical mechanism. This inclusion of aromatics also results in CO mixing ratio increases, which cause a general decrease in OH concentrations. The largest changes are found in glyoxal and NO3, with increases in the atmospheric burden of 10 % and 6 %, respectively.Regionally, significant differences were found particularly in high NOx regime areas, with an increase of up to 4 % in O3 mixing ratios and 8 % in OH concentrations. NO3 increased by more than 30 % in several regions of the northern hemisphere, and glyoxal increased up to 40 % in Europe and Asia. Large increases in formaldehyde were found in urban areas.Although the relative impact of aromatics at the global scale is limited, at a regional level they are important in atmospheric chemistry.

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Contributing Institute(s):

1. Troposphäre (IEK-8)

Research Program(s):

1. 243 - Tropospheric trace substances and their transformation processes (POF3-243) (POF3-243)

Appears in the scientific report 2017

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Database coverage:
; ; ; ; DOAJ Seal ; NCBI Molecular Biology Database

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