F. Holland

Measurement report: Comprehensive seasonal study of the composition and sources of submicron aerosol during the JULIAC campaign in Germany

Lu Liu, Thorsten Hohaus, Andreas Hofzumahaus, F. Holland et autres

The seasonal variations of aerosol sources and their atmospheric evolution are investigated using observations from the year-long JULIAC (Jülich Atmospheric Chemistry Project) campaign (January–November 2019) in Jülich, Germany. Non-refractory submicron aerosol components were continuously measured alongside oxidants (OH, O 3 , NO …

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Supplementary material to "Measurement report: Comprehensive Seasonal Study of the Composition and Sources of Submicron Aerosol during the JULIAC Campaign in Germany"

Lu Liu, Thorsten Hohaus, Andreas Hofzumahaus, F. Holland et autres

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Measurement report: Comprehensive Seasonal Study of the Composition and Sources of Submicron Aerosol during the JULIAC Campaign in Germany

Lu Liu, Thorsten Hohaus, Andreas Hofzumahaus, F. Holland et autres

Abstract. The seasonal variations of aerosol sources and their atmospheric evolution are investigated using observations from the year-long JULIAC campaign (January–November 2019) in Jülich, Germany. Non-refractory submicron aerosol components were continuously measured alongside oxidants (OH, O3, NO3), trace gases, and meteorological conditions. …

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Advances in an OH reactivity instrument for airborne field measurements

Hendrik Fuchs, Aaron Stainsby, Florian Berg, René Dubus et autres

Hydroxyl radical (OH) reactivity, which is the inverse lifetime of the OH radical, provides information on the burden of air pollutants, since almost all air pollutants react with OH. OH reactivity measurements from field experiments can help to identify gaps in the …

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Temperature-dependent rate coefficients for the reactions of OH radicals with selected alkanes, aromatic compounds, and monoterpenes

Florian Berg, Anna Novelli, René Dubus, Andreas Hofzumahaus et autres

The rate coefficients of the reaction of hydroxyl radicals (OH) with 12 different volatile organic compounds (VOCs), namely methane, ethane, propane, n -butane, methyl vinyl ketone (MVK), γ -terpinene, Δ 3 -carene, myrcene, toluene, o -xylene, m -xylene, and mesitylene, were studied …

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Advances in OH reactivity instruments for airborne field measurements

Hendrik Fuchs, Aaron Stainsby, Florian Berg, René Dubus et autres

Abstract. Hydroxyl radical OH reactivity, which is the inverse lifetime of the OH radical, provides information on the burden of air pollutants, since almost all air pollutants react with OH. OH reactivity measurements from field experiments can help to identify gaps in …

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Observational evidence reveals the significance of nocturnal chemistry in seasonal secondary organic aerosol formation

Lu Liu, Thorsten Hohaus, Philipp Franke, Anne Caroline Lange et autres

Abstract Oxidized Organic Aerosol (OOA), a major component of fine atmospheric particles, impacts climate and human health. Previous experiments and atmospheric models emphasize the importance of nocturnal OOA formation from NO3· oxidation of biogenic VOCs. This seasonal study extends the understanding by …

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Temperature-dependent rate coefficients for the reaction of OH radicals with selected alkanes, aromatic compounds and monoterpenes

Florian Berg, Anna Novelli, René Dubus, Andreas Hofzumahaus et autres

Abstract. The rate coefficients of the reaction of hydroxyl radicals (OH) with 12 different volatile organic compounds (VOCs), methane, ethane, propane, n-butane, methyl vinyl ketone (MVK), γ-terpinene, Δ3-carene, myrcene, toluene, o-xylene, m-xylene, mesitylene were studied in an absolute rate study in 1 …

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Supplementary material to "Temperature-dependent rate coefficients for the reaction of OH radicals with selected alkanes, aromatic compounds and monoterpenes"

Florian Berg, Anna Novelli, René Dubus, Andreas Hofzumahaus et autres

S1 Data of reaction coefficient measurementsTable S1.OH reaction rates of methane measured in this study.

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Experimental chemical budgets of OH, HO 2 , and RO 2 radicals in rural air in western Germany during the JULIAC campaign 2019

Changmin Cho, Hendrik Fuchs, Andreas Hofzumahaus, F. Holland et autres

Photochemical processes in ambient air were studied using the atmospheric simulation chamber SAPHIR at Forschungszentrum Jülich, Germany. Ambient air was continuously drawn into the chamber through a 50 m high inlet line and passed through the chamber for 1 month in each …

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Comment on egusphere-2022-820

Changmin Cho, Hendrik Fuchs, Andreas Hofzumahaus, F. Holland et autres

Abstract. Photochemical processes in ambient air were studied using the atmospheric simulation chamber SAPHIR at Forschungszentrum Jülich, Germany. Ambient air was continuously drawn into the chamber through a 50 m high inlet line and passed through the chamber for one month in …

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Seasonal variation in nitryl chloride and its relation to gas-phase precursors during the JULIAC campaign in Germany

Zhaofeng Tan, Hendrik Fuchs, Andreas Hofzumahaus, William James Bloss et autres

Ambient measurements of nitryl chloride (ClNO 2 ) were performed at a rural site in Germany, covering three periods in winter, summer, and autumn 2019, as part of the JULIAC campaign (Jülich Atmospheric Chemistry Project) that aimed to understand the photochemical processes …

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