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024 7 _ |a 10.5194/acp-2017-928
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024 7 _ |a 1680-7375
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037 _ _ |a FZJ-2017-07310
082 _ _ |a 550
100 1 _ |a Cabrera-Perez, David
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245 _ _ |a Global impact of monocyclic aromatics on tropospheric composition
260 _ _ |a Katlenburg-Lindau
|c 2017
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336 7 _ |a ARTICLE
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520 _ _ |a 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.
536 _ _ |a 243 - Tropospheric trace substances and their transformation processes (POF3-243)
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700 1 _ |a Taraborrelli, Domenico
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700 1 _ |a Lelieveld, Jos
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700 1 _ |a Hoffmann, Thorsten
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700 1 _ |a Pozzer, Andrea
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773 _ _ |a 10.5194/acp-2017-928
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914 1 _ |y 2017
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