A5037276573- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Advanced Chemical Sensor Technologies
- Plant responses to elevated CO2
- Air Quality Monitoring and Forecasting
- Spectroscopy and Laser Applications
- Atmospheric aerosols and clouds
- Mass Spectrometry Techniques and Applications
- Odor and Emission Control Technologies
- Analytical Chemistry and Chromatography
- Air Quality and Health Impacts
- Per- and polyfluoroalkyl substances research
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Advancements in Battery Materials
Max Planck Institute for Chemistry
2017-2023
Johannes Gutenberg University Mainz
2015-2016
University of Aberdeen
2015
Wildfires inject large amounts of black carbon (BC) particles into the atmosphere, which can reach lowermost stratosphere (LMS) and cause strong radiative forcing. During a 14-month period observations on board passenger aircraft flying between Europe North America, we found frequent widespread biomass burning (BB) plumes, influencing 16 160 flight hours in LMS. The average BC mass concentrations these plumes (∼140 ng·m −3 , standard temperature pressure) were over 20 times higher than...
Abstract The hydroxyl (OH) radical is the key oxidant in global atmosphere as it controls concentrations of toxic gases like carbon monoxide and climate relevant methane. In some regions, oxidation by chlorine (Cl) also important, stratosphere both OH Cl radicals impact ozone. An empirical method presented to determine effective troposphere lower stratosphere, based on CH 4 , 3 Cl, SF 6 data from aircraft measurements (IAGOS-CARIBIC) a ground-based station (NOAA). Tropospheric average values...
Abstract. We present the first direct measurements of NO3 reactivity (or inverse lifetime, s−1) in Finnish boreal forest. The data were obtained during IBAIRN campaign (Influence Biosphere-Atmosphere Interactions on Reactive Nitrogen budget) which took place Hyytiälä, Finland summer/autumn transition September 2016. was generally very high with a maximum value 0.94 s−1 and displayed strong diel variation campaign-averaged nighttime mean 0.11 compared to daytime 0.04 s−1. highest accompanied...
Abstract. The formation of alkyl nitrates in various oxidation processes taking place throughout the diel cycle can represent an important sink reactive nitrogen and mechanism for chain termination atmospheric photo-oxidation cycles. low-volatility (ANs) formed from biogenic volatile organic compounds (BVOCs), especially terpenoids, enhance rates production growth secondary aerosol. Measurements NO3 reactivity mixing ratio total (ΣANs) Finnish boreal forest enabled assessment relative...
Organic compounds contribute to a major fraction of atmospheric aerosols and have significant impacts on climate human health. However, because their chemical complexity, measurement remains challenge for analytical instrumentation. Here we present the development characterization new soft ionization technique that allows mass spectrometric real-time detection organic in aerosols. The aerosol flowing atmospheric-pressure afterglow (AeroFAPA) ion source is based helium glow discharge plasma,...
Now that fast action is needed to mitigate the effects of climate change, developing new technologies reduce worldwide carbon footprint critical. Sodium ion capacitors can be a key enabler for widespread transport electrification or massive adoption renewable technologies. However, years‐long journey needs made from first proof‐of‐concept report degree maturity technology transfer market. To shorten this path, work gathers all stakeholders involved in technical development sodium capacitor...
Abstract. Pyruvic acid (CH3C(O)C(O)OH, 2-oxopropanoic acid) is an organic of biogenic origin that plays a crucial role in plant metabolism, present tropospheric air both gas-phase and aerosol-phase, implicated the formation secondary aerosols (SOAs). Up to now, only few field studies have reported mixing ratios pyruvic acid, its sources sinks are poorly constrained. We first measurements boreal forest as part IBAIRN (Influence Biosphere–Atmosphere Interactions on Reactive Nitrogen budget)...
Ambient desorption/ionization mass spectrometry (MS) has gained growing interest during the last decade due to its high analytical performance and yet simplicity. Here, one of recently developed ambient MS sources, flowing atmospheric-pressure afterglow (FAPA) source, was investigated in detail regarding background ions typical ionization patterns positive as well negative ion mode for a variety compound classes, comprising alkanes, alcohols, aldehydes, ketones, carboxylic acids, organic...
Abstract Carbonyl sulfide (OCS or COS) is a ubiquitous trace gas and plays role in forming stratospheric sulfate aerosol particles, thereby influencing climate. In this study, whole‐air samples containing OCS were collected onboard passenger aircraft (IAGOS‐CARIBIC) from the upper troposphere/lowermost stratosphere (UT/LMS, 10–12 km) region analyzed with CryoTrap–GC–AED system laboratory. Global mixing ratios are presented by using measurements conjunction other gases, an atmospheric...
Abstract. A gas detection system has been developed, characterized, and deployed for pressurized gas-phase sample analyses near-real-time online measurements. It consists of a cryogenic pre-concentrator (CryoTrap), chromatograph (GC), new high-resolution atomic emission detector (AED III HR). Here the CryoTrap–GC–AED instrumental setup is presented, performance iodine (1635 ± 135 counts I atom−1 pptv−1), sulfur (409 57 S carbon (636 69 C bromine (9.1 1.8 Br nitrogen (28 2 N pptv−1) lines...
Abstract. The formation of alkyl nitrates in various oxidation processes taking place throughout the diel cycle can represent an important sink reactive nitrogen and mechanism for chain-termination atmospheric photo-oxidation cycles. low volatility formed from biogenic volatile organic compounds (BVOCs), especially terpenoids, enhance rates production growth secondary aerosol. Measurements NO3-reactivity mixing ratio total Finnish boreal forest enabled assessment relative importance NO3−,...
Abstract. Based on the first measurements of gas-phase pyruvic acid (CH3C(O)C(O)OH) in boreal forest, we derive effective emission rates and compare them with monoterpene over diel cycle. Using a data-constrained box model, determine impact photolysis formation acetaldehyde (CH3CHO) peroxy radicals CH3C(O)O2 HO2 during an autumn campaign forest. The results are dependent quantum yield (φ) mechanism photodissociation fate likely major product, methylhydroxy carbene (CH3COH). With investigate...
Abstract. Pyruvic acid, CH3C(O)C(O)OH, is an organic acid of biogenic origin that plays a crucial role in plant metabolism, present tropospheric air both gas-phase and aerosol-phase implicated the formation secondary aerosols (SOA). Up to now, only few field studies have reported mixing ratios pyruvic its sources sinks are poorly constrained. We first measurements boreal forest as part IBAIRN (Influence Biosphere–Atmosphere Interactions on Reactive Nitrogen budget) campaign Hyytiälä,...
Abstract. Based on the first measurements of gas-phase pyruvic acid (CH3C(O)C(O)OH) in boreal forest, we derive effective emission rates and compare them with monoterpene over diel cycle. Using a data-constrained box-model, determine impact photolysis formation acetaldehyde (CH3CHO) peroxy radicals CH3C(O)O2, CH3O2 HO2 during an autumn (IBAIRN) summer (HUMPPA) campaign at same site. The results are dependent photodissociation mechanism examine different scenarios which main products either...
Abstract. We present the first direct measurements of NO3 reactivity (or inverse lifetime, s−1) in Finnish boreal forest. The data were obtained during IBAIRN campaign (Influence Biosphere-Atmosphere Interactions on Reactive Nitrogen budget) which took place Hyytiälä, Finland summer/autumn transition September 2016. was generally very high with a maximum value 0.94 s−1 and displayed strong diel variation campaign-averaged nighttime mean 0.11 compared to daytime 0.04 s−1. highest...
Table S1: Overview of instruments and measured parameters in the IBAIRN HUMPPA campaigns.