Jörg Kleffmann
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View article: Role of Heterogeneous Reactions in the Atmospheric Oxidizing Capacity in Island Environments
Role of Heterogeneous Reactions in the Atmospheric Oxidizing Capacity in Island Environments Open
The source of nitrous acid (HONO) and its importance in island or marine environments are poorly understood. Herein, based on comprehensive field measurements at a hilltop on Corsica Island, we find an inverse diel variation of HONO with h…
View article: TunNOx: Development and testing of a photocatalytic reactor for efficient NOx-Abatement of Road-Tunnel exhaust
TunNOx: Development and testing of a photocatalytic reactor for efficient NOx-Abatement of Road-Tunnel exhaust Open
In the TunNOx project a highly efficient photocatalytic reactor was developed, which can be integrated into transverse ventilation systems of road tunnels. First, an active photocatalytic coating was developed and tested in the laboratory …
View article: Snowpack nitrate photolysis drives the summertime atmospheric nitrous acid (HONO) budget in coastal Antarctica
Snowpack nitrate photolysis drives the summertime atmospheric nitrous acid (HONO) budget in coastal Antarctica Open
Measurements of atmospheric nitrous acid (HONO) amount fraction and flux density above snow were carried out using a long-path absorption photometer at Halley station in coastal Antarctica between 22 January and 3 February 2022. The mean ±…
View article: Snowpack nitrate photolysis drives the summertime atmospheric nitrous acid (HONO) budget in coastal Antarctica
Snowpack nitrate photolysis drives the summertime atmospheric nitrous acid (HONO) budget in coastal Antarctica Open
In the polar regions, the usual OH radical formation pathway (ozone photolysis and reaction of O(1D) with H2O) is limited by the low water vapour concentration. However, gases emitted from the snowpack can be pre-cursors of HOx radicals an…
View article: Photocatalysis in agricultural soils: Mineralogy and soil properties control the fixation and emission of NOx and other trace gases of N
Photocatalysis in agricultural soils: Mineralogy and soil properties control the fixation and emission of NOx and other trace gases of N Open
Trace gases of nitrogen (N), such as NOx (nitric oxide, NO + nitrogen dioxide, NO2) have a negative impact on human health and the environment. Although NOx are naturally produced in volcanic eruptions, forest fires and biotic nitrificatio…
View article: Snowpack nitrate photolysis drives the summertime atmospheric nitrous acid (HONO) budget in coastal Antarctica
Snowpack nitrate photolysis drives the summertime atmospheric nitrous acid (HONO) budget in coastal Antarctica Open
Measurements of atmospheric nitrous acid (HONO) amount fraction and flux density above snow were carried out using a long path absorption photometer at Halley station in coastal Antarctica between 22 January and 3 February 2022. The mean±1…
View article: Techniques for measuring indoor radicals and radical precursors
Techniques for measuring indoor radicals and radical precursors Open
International audience
View article: A relaxed eddy accumulation (REA) LOPAP system for flux measurements of nitrous acid (HONO)
A relaxed eddy accumulation (REA) LOPAP system for flux measurements of nitrous acid (HONO) Open
In the present study a relaxed eddy accumulation (REA) system for the quantification of vertical fluxes of nitrous acid (HONO) was developed and tested. The system is based on a three-channel long-path absorption photometer (LOPAP) instrum…
View article: Atmospheric measurements at Mt. Tai – Part I: HONO formation and its role in the oxidizing capacity of the upper boundary layer
Atmospheric measurements at Mt. Tai – Part I: HONO formation and its role in the oxidizing capacity of the upper boundary layer Open
A comprehensive field campaign, with measurements of HONO and related parameters, was conducted in summer 2018 at the foot (150 m a.s.l.) and the summit (1534 m a.s.l.) of Mt. Tai (Shandong province, China). At the summit station, high HON…
View article: A source for the continuous generation of pure and quantifiable HONO mixtures
A source for the continuous generation of pure and quantifiable HONO mixtures Open
A continuous source for the generation of pure HONO mixtures was developed and characterized, which is based on the Henry's law solubility of HONO in acidic aqueous solutions. With the help of a peristaltic pump, diluted nitrite and sulfur…
View article: Reply on RC2
Reply on RC2 Open
Abstract. In the present study a relaxed eddy accumulation (REA) system for the quantification of vertical fluxes of nitrous acid (HONO) was developed and tested. The system is based on a three-channel long-path absorption photometer (LOPA…
View article: Comment on amt-2021-408
Comment on amt-2021-408 Open
Abstract. In the present study a relaxed eddy accumulation (REA) system for the quantification of vertical fluxes of nitrous acid (HONO) was developed and tested. The system is based on a three-channel long-path absorption photometer (LOPA…
View article: Atmospheric measurements at Mt. Tai – Part II: HONO budget and radical (RO <sub> <i>x</i> </sub> + NO <sub>3</sub> ) chemistry in the lower boundary layer
Atmospheric measurements at Mt. Tai – Part II: HONO budget and radical (RO <sub> <i>x</i> </sub> + NO <sub>3</sub> ) chemistry in the lower boundary layer Open
In the summer of 2018, a comprehensive field campaign, with measurements on HONO and related parameters, was conducted at the foot (150 m a.s.l.) and the summit of Mt. Tai (1534 m a.s.l.) in the central North China Plain (NCP). With the im…
View article: Reply on RC1
Reply on RC1 Open
Abstract. In the present study a relaxed eddy accumulation (REA) system for the quantification of vertical fluxes of nitrous acid (HONO) was developed and tested. The system is based on a three-channel long-path absorption photometer (LOPA…
View article: Comment on amt-2021-408
Comment on amt-2021-408 Open
Abstract. In the present study a relaxed eddy accumulation (REA) system for the quantification of vertical fluxes of nitrous acid (HONO) was developed and tested. The system is based on a three-channel long-path absorption photometer (LOPA…
View article: A Relaxed Eddy Accumulation (REA) LOPAP-System for Flux Measurements of Nitrous Acid (HONO)
A Relaxed Eddy Accumulation (REA) LOPAP-System for Flux Measurements of Nitrous Acid (HONO) Open
In the present study a Relaxed Eddy Accumulation (REA) system for the quantification of vertical fluxes of nitrous acid (HONO) was developed and tested. The system is based on a three-channel-LOPAP instrument, for which two channels are us…
View article: Reply on RC3
Reply on RC3 Open
Abstract. A continuous source for the generation of pure HONO mixtures was developed and characterized, which is based on the Henry's law solubility of HONO in acidic aqueous solutions. With the help of a peristaltic pump, diluted nitrite …
View article: Comment on amt-2021-332
Comment on amt-2021-332 Open
Abstract. A continuous source for the generation of pure HONO mixtures was developed and characterized, which is based on the Henry's law solubility of HONO in acidic aqueous solutions. With the help of a peristaltic pump, diluted nitrite …
View article: Reply on RC2
Reply on RC2 Open
Abstract. A continuous source for the generation of pure HONO mixtures was developed and characterized, which is based on the Henry's law solubility of HONO in acidic aqueous solutions. With the help of a peristaltic pump, diluted nitrite …
View article: Reply on RC1
Reply on RC1 Open
Abstract. A continuous source for the generation of pure HONO mixtures was developed and characterized, which is based on the Henry's law solubility of HONO in acidic aqueous solutions. With the help of a peristaltic pump, diluted nitrite …
View article: Comment on amt-2021-332
Comment on amt-2021-332 Open
Abstract. A continuous source for the generation of pure HONO mixtures was developed and characterized, which is based on the Henry's law solubility of HONO in acidic aqueous solutions. With the help of a peristaltic pump, diluted nitrite …
View article: Comment on amt-2021-332
Comment on amt-2021-332 Open
Abstract. A continuous source for the generation of pure HONO mixtures was developed and characterized, which is based on the Henry's law solubility of HONO in acidic aqueous solutions. With the help of a peristaltic pump, diluted nitrite …
View article: A Source for the Continuous Generation of Pure and Quantifiable HONO Mixtures
A Source for the Continuous Generation of Pure and Quantifiable HONO Mixtures Open
A continuous source for the generation of pure HONO mixtures was developed and characterized, which is based on the Henry’s law solubility of HONO in acidic aqueous solutions. With the help of a peristaltic pump diluted nitrite and sulfuri…
View article: Comment on acp-2021-529
Comment on acp-2021-529 Open
Abstract. A comprehensive field campaign, with measurements of HONO and related parameters, was conducted in summer 2018 at the foot (150 m a.s.l.) and the summit (1534 m a.s.l.) of Mt. Tai (Shandong province, China). At the summit station…
View article: Comment on acp-2021-531
Comment on acp-2021-531 Open
Abstract. In the summer of 2018, a comprehensive field campaign, with measurements on HONO and related parameters, was conducted at the foot (150 m a.s.l.) and the summit of Mt. Tai (1534 m a.s.l.) in the central North China Plain (NCP). W…
View article: Atmospheric Measurements at the Foot and the Summit of Mt. Tai – Part II: HONO Budget and Radical (RO <sub>x</sub> + NO <sub>3</sub> ) Chemistry in the Lower Boundary Layer
Atmospheric Measurements at the Foot and the Summit of Mt. Tai – Part II: HONO Budget and Radical (RO <sub>x</sub> + NO <sub>3</sub> ) Chemistry in the Lower Boundary Layer Open
In the summer of 2018, a comprehensive field campaign, with measurements on HONO and related parameters, was conducted at the foot (150 m a.s.l.) and the summit of Mt. Tai (1534 m a.s.l.) in the central North China Plain (NCP). With the im…
View article: Atmospheric Measurements at the Foot and the Summit of Mt. Tai – Part I: HONO Formation and Its Role in the Oxidizing Capacity of the Upper Boundary Layer
Atmospheric Measurements at the Foot and the Summit of Mt. Tai – Part I: HONO Formation and Its Role in the Oxidizing Capacity of the Upper Boundary Layer Open
A comprehensive field campaign, with measurements of HONO and related parameters, was conducted in summer 2018 at the foot (150 m a.s.l.) and the summit (1534 m a.s.l.) of Mt. Tai (Shandong province, China). At the summit station, high HON…
View article: Guaiacol Nitration in a Simulated Atmospheric Aerosol with an Emphasis on Atmospheric Nitrophenol Formation Mechanisms
Guaiacol Nitration in a Simulated Atmospheric Aerosol with an Emphasis on Atmospheric Nitrophenol Formation Mechanisms Open
Atmospheric nitrophenols are pollutants of concern due to their toxicity and light-absorption characteristics and their low reactivity resulting in relatively long residence times in the environment. We investigate multiphase nitrophenol f…