TY  - JOUR
AU  - Cabrera-Perez, David
AU  - Taraborrelli, Domenico
AU  - Lelieveld, Jos
AU  - Hoffmann, Thorsten
AU  - Pozzer, Andrea
TI  - Global impact of monocyclic aromatics on tropospheric composition
JO  - Atmospheric chemistry and physics / Discussions
VL  - 928
SN  - 1680-7375
CY  - Katlenburg-Lindau
PB  - EGU
M1  - FZJ-2017-07310
SP  - 1 - 25
PY  - 2017
AB  - 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.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.5194/acp-2017-928
UR  - https://juser.fz-juelich.de/record/838785
ER  -