A5027209843- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Air Quality and Health Impacts
- Maritime Transport Emissions and Efficiency
- Catalytic Processes in Materials Science
- Spectroscopy and Laser Applications
- Geological Modeling and Analysis
- Free Radicals and Antioxidants
- Oceanographic and Atmospheric Processes
- Ocean Acidification Effects and Responses
- Olfactory and Sensory Function Studies
- Advanced Chemical Sensor Technologies
- Geophysics and Gravity Measurements
- Atmospheric and Environmental Gas Dynamics
- Indoor Air Quality and Microbial Exposure
- Geochemistry and Geologic Mapping
- Interdisciplinary Research and Collaboration
- Marine and coastal ecosystems
- Artificial Intelligence in Healthcare and Education
- scientometrics and bibliometrics research
- Analytical Chemistry and Chromatography
- Atmospheric aerosols and clouds
- Water Quality Monitoring and Analysis
- Various Chemistry Research Topics
European Organisation for the Exploitation of Meteorological Satellites
2024
Max Planck Institute for Chemistry
2019-2023
Max Planck Society
2021
University of Applied Sciences Mainz
2021
University of Copenhagen
2017
Abstract. Strongly enhanced tropospheric ozone (O3) mixing ratios have been reported in the Arabian Basin, a region with intense solar radiation and high concentrations of O3 precursors such as nitrogen oxides (NOx) volatile organic compounds (VOCs). To analyze photochemical production marine boundary layer (MBL) around Peninsula, we use shipborne observations NO, NO2, O3, OH, HO2, HCHO, actinic flux, water vapor, pressure temperature obtained during summer 2017 Air Quality Climate Basin...
Abstract. Isoprene oxidation by nitrate radical (NO3) is a potentially important source of secondary organic aerosol (SOA). It suggested that the second or later-generation products are more substantial contributors to SOA. However, there few studies investigating multi-generation chemistry isoprene-NO3 reaction, and information about volatility different isoprene nitrates, which essential evaluate their potential form SOA determine atmospheric fate, rare. In this work, we studied reaction...
Under atmospheric conditions, nitrate-RO<sub>2</sub> radicals are equilibrated and react predominantly with HO<sub>2</sub>, RO<sub>2</sub> NO. The nitrate-RO chemistry is affected strongly by ring closure to epoxy radicals, impeding formation of MVK/MACR.
Abstract. Shipborne measurements of nitryl chloride (ClNO2), hydrogen (HCl) and sulfur dioxide (SO2) were made during the AQABA (Air Quality climate change in Arabian BAsin) ship campaign summer 2017. The dataset includes over Mediterranean Sea, Suez Canal, Red Gulf Aden, Oman, (also known as Persian Gulf) with observed ClNO2 mixing ratios ranging from limit detection to ≈600 pptv. We examined regional variability generation via uptake dinitrogen pentoxide (N2O5) Cl-containing aerosol its...
Abstract. We present shipborne measurements of NOx (≡ NO + NO2) and NOy NOx+ gas- particle-phase organic inorganic oxides nitrogen) in summer 2017 as part the expedition “Air Quality climate change Arabian BAsin” (AQABA). The NOz NOy-NOx) measurements, made with a thermal dissociation cavity ring-down spectrometer (TD-CRDS), were used to examine chemical mechanisms involved processing primary emissions their influence on budget chemically distinct marine environments, including Mediterranean...
Abstract. The gas-phase reaction of isoprene with the nitrate radical (NO3) was investigated in experiments outdoor SAPHIR chamber under atmospherically relevant conditions specifically respect to chemical lifetime and fate nitrato-organic peroxy radicals (RO2). Observations organic products were compared concentrations expected from different mechanisms: (1) Master Chemical Mechanism, which simplifies NO3 chemistry by only considering one RO2 isomer; (2) mechanism derived Caltech chamber,...
Abstract. In a series of experiments in an atmospheric simulation chamber (SAPHIR,1 Forschungszentrum Jülich, Germany), NO3 reactivity (kNO3) resulting from the reaction with isoprene and stable trace gases formed as products was measured directly using flow tube reactor coupled to cavity ring-down spectrometer (FT-CRDS). The were carried out both dry humid air variation initial mixing ratios ozone (50–100 ppbv), (3–22 ppbv) NO2 (5–30 ppbv). kNO3 excellent agreement values calculated ratio...
Environmental contextThe fresh pleasant smell of laundry dried outside in sunlight is recognised by most people, but despite decades speculation the origin has not been demonstrated. We show that line-dried due to unique combination traces atmospheric hydrocarbons, and a wet fabric surface. This surface photochemistry likely be widespread environment on surfaces natural materials. AbstractIn this study, we find drying method key element generating well-known scent laundry, which argue...
Abstract. The gas-phase reaction of isoprene with the nitrate radical (NO3) was investigated in experiments outdoor SAPHIR chamber at atmospherically relevant conditions specifically respect to chemical lifetime and fate nitrato-organic peroxy radicals (RO2). Observations organic products were compared concentrations expected from different mechanisms: (1) Master Chemical Mechanism, which simplifies NO3 chemistry by only considering one RO2 conformer. (2) mechanism derived CalTech chamber,...
Abstract This work presents highlights from the 2021 and 2022 EUMETSAT conferences, drawn their presentations, posters panel discussions placed into wider context of global Earth Observing (EO) system. These collectively reveal much about current state knowledge EO system, its potential future evolutions how that system may be used to produce useful products services. European, American Asian space agencies presented visions for next generation operational satellite programmes demonstrated...
Abstract. Isoprene oxidation by nitrate radical (NO3) is a potentially important source of secondary organic aerosol (SOA). It suggested that the second or later-generation products are more substantial contributors to SOA. However, there few studies investigating multi-generation chemistry isoprene-NO3 reaction, and information about volatility different isoprene nitrates, which essential evaluate their potential form SOA determine atmospheric fate, rare. In this work, we studied reaction...
Abstract. We present ship-borne measurements of NOx (≡ NO + NO2) and NOy gas- particle-phase organic inorganic oxides nitrogen) in summer 2017 as part the expedition Air Quality climate change Arabian Basin (AQABA). The NOz NOy–NOx) measurements, made with a thermal dissociation cavity-ringdown-spectrometer (TD-CRDS), were used to examine chemical mechanisms involved processing primary emissions their influence on budget chemically distinct marine environments, including Mediterranean Sea,...
Abstract. Strongly enhanced tropospheric ozone mixing ratios have been reported in the Arabian Basin, a region with intense solar radiation and high concentrations of precursors such as nitrogen oxides volatile organic compounds. To analyze photochemical production marine boundary layer (MBL) around Peninsula, we use ship-borne observations NO, NO2, O3, OH, HO2, HCHO, actinic flux, water vapor, pressure temperature obtained during summer 2017 Air Quality Climate Basin (AQABA) campaign,...
Abstract. In a series of experiments in an atmospheric simulation chamber (SAPHIR, Forschungszentrum Jülich, Germany) NO3 reactivity (kNO3) resulting from the reaction with isoprene and stable trace gases formed as products was measured directly using flow-tube reactor coupled to cavity-ring-down spectrometer (FT-CRDS). The were carried out both dry humid air variation initial mixing ratios ozone (50–100 ppbv), (3–22 ppbv) NO2 (5–30 ppbv). kNO3 excellent agreement values calculated ratio...
Figure S1: Total aerosol mass concentration during the AQABA campaign, as measured by an Optical Particle Counter in PM10 size range.The contribution of coarse mode was estimated form (PM10-PM1)/PM10 ratio.Highest concentrations were on both legs observed transitional area between Red Sea and Arabian Sea, where 5 contributed ca.> 90 % to total concentration.