A5012088874- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Advanced Aircraft Design and Technologies
- Aeolian processes and effects
- Air Traffic Management and Optimization
- Information and Cyber Security
- Environmental and biological studies
- Environmental DNA in Biodiversity Studies
- Misinformation and Its Impacts
- Spam and Phishing Detection
- Microbial Community Ecology and Physiology
- Vehicle emissions and performance
- Political Theology and Sovereignty
- Radar Systems and Signal Processing
- Comparative constitutional jurisprudence studies
- Human Rights and Immigration
- Particle Dynamics in Fluid Flows
- Criminal Law and Policy
- Russian Literature and Bakhtin Studies
- Conflict, Peace, and Violence in Colombia
- Icing and De-icing Technologies
- Criminal Justice and Penology
Carl von Ossietzky Universität Oldenburg
2024
Max Planck Institute for Chemistry
2015-2022
Leibniz Institute for Tropospheric Research
2020-2022
Leibniz Centre for Agricultural Landscape Research
2022
Johannes Gutenberg University Mainz
2019
Berlin Heart (Germany)
2016
Bavarian State Library
1992
Abstract Between 1 September and 4 October 2014, a combined airborne ground-based measurement campaign was conducted to study tropical deep convective clouds over the Brazilian Amazon rain forest. The new German research aircraft, High Altitude Long Range Research Aircraft (HALO), modified Gulfstream G550, extensive instrumentation were deployed in near Manaus (State of Amazonas). part German–Brazilian Aerosol, Cloud, Precipitation, Radiation Interactions Dynamics Convective Cloud...
Abstract. Airborne observations over the Amazon Basin showed high aerosol particle concentrations in upper troposphere (UT) between 8 and 15 km altitude, with number densities (normalized to standard temperature pressure) often exceeding those planetary boundary layer (PBL) by 1 or 2 orders of magnitude. The measurements were made during German–Brazilian cooperative aircraft campaign ACRIDICON–CHUVA, where ACRIDICON stands for Aerosol, Cloud, Precipitation, Radiation Interactions Dynamics...
Abstract. Black carbon (BC) aerosols influence the Earth's atmosphere and climate, but their microphysical properties, spatiotemporal distribution, long-range transport are not well constrained. This study presents airborne observations of transatlantic BC-rich African biomass burning (BB) smoke into Amazon Basin using a Single Particle Soot Photometer (SP2) as several complementary techniques. We base our results on trace gases off Brazilian coast onboard HALO (High Altitude LOng range)...
Abstract. During the ACRIDICON-CHUVA field project (September–October 2014; based in Manaus, Brazil) aircraft-based situ measurements of aerosol chemical composition were conducted tropical troposphere over Amazon using High Altitude and Long Range Research Aircraft (HALO), covering altitudes from boundary layer (BL) height up to 14.4 km. The submicron non-refractory was characterized by flash-vaporization/electron impact-ionization particle mass spectrometry. results show that significant...
Combining unique high-altitude aircraft measurements and detailed regional model simulations, we show that in-plant biochemistry plays a central but previously unidentified role in fine particulate-forming processes atmosphere–biosphere–climate interactions over the Amazon rainforest. Isoprene epoxydiol secondary organic aerosols (IEPOX-SOA) are key components of sub-micrometer aerosol particle mass throughout troposphere rainforest traditionally thought to form by multiphase chemical...
Abstract. Secondary organic aerosol (SOA) is a dominant contributor of fine particulate matter in the atmosphere, but complexity SOA formation chemistry hinders accurate representation models. Volatility-based parameterizations have been adopted many recent modeling studies and shown reasonable performance compared to observations. However, assumptions made these empirical can lead substantial errors when applied future climatic conditions as they do not include mechanistic understanding...
Abstract. Vast stretches of agricultural land in southern and central Africa are burnt between June September each year, which releases large quantities aerosol into the atmosphere. The resulting smoke plumes carried west over Atlantic Ocean at altitudes 2 4 km. As only limited observational data West have existed until now, whether this pollution has an impact lower remained unclear. Dynamics-aerosol-chemistry-cloud interactions (DACCIWA) aircraft campaign took place during July 2016, with...
Abstract. Aircraft-borne in situ measurements of the chemical aerosol composition were conducted Asian tropopause layer (ATAL) over Indian subcontinent summer 2017, covering particle sizes below ∼3 µm. We have implemented a recently developed mass spectrometer, which adopts laser desorption technique as well thermal method for quantitative bulk information (i.e., modified Aerodyne AMS), aboard high-altitude research aircraft M-55 Geophysica. The instrument was deployed July and August 2017...
Abstract Secondary organic aerosols (SOA) are large contributors to fine particle mass loading and number concentration interact with clouds radiation. Several processes affect the formation, chemical transformation, removal of SOA in atmosphere. For computational efficiency, global models use simplified treatments, which often do not capture dynamics formation. Here we test more complex treatments within Energy Exascale Earth System Model (E3SM) investigate how simulated spatial...
Abstract. In this study, we present a fully automated aerosol mass spectrometer (AMS) that is operated during regular passenger aircraft flights in the CARIBIC (Civil Aircraft for Regular Investigation of Atmosphere Based on an Instrument Container) part European Research Infrastructure IAGOS (In-service Global Observing System – www.iagos.org). The instrument, termed CARIBIC-AMS, able to measure concentration non-refractory species, namely sulfate, nitrate, ammonium, and organics, particle...
Abstract. We present a novel and compact design of constant-pressure inlet (CPI) developed for use in airborne aerosol mass spectrometry. In particular, the system is optimized aerodynamic lenses commonly used spectrometers, which efficient focusing particles into vacuum chamber requires precisely controlled lens pressure, typically few hectopascals. The CPI device can also be condensation particle counters (CPCs), cloud nucleus (CCNCs), gas-phase sampling instruments across wide range...
Abstract. Aircraft borne in-situ measurements of the chemical aerosol composition were conducted in Asian Tropopause Aerosol layer (ATAL) over Indian subcontinent summer 2017 covering particle sizes below 3 µm. We have implemented a recently developed mass spectrometer, which adopts laser desorption technique as well thermal method for quantitative bulk information (i.e. modified Aerodyne AMS), aboard high altitude research aircraft M-55 Geophysica. The instrument was deployed July and...
Abstract. The long-range transport (LRT) of trace gases and aerosol particles plays an important role for the composition Amazonian rain forest atmosphere. Sulfate aerosols originate to a substantial extent from LRT sources play in atmosphere as strongly light-scattering effective cloud condensation nuclei. transatlantic volcanic sulfur emissions Africa has been considered source particulate sulfate Amazon; however, direct observations have lacking so far. This study provides observational...
Abstract. Airborne observations over the Amazon Basin showed high aerosol particle concentrations in upper troposphere (UT) between 8 and 15 km altitude, with number densities (normalized to standard temperature pressure) often exceeding those planetary boundary layer (PBL) by one or two orders of magnitude. The measurements were made during German-Brazilian cooperative aircraft campaign ACRIDICON-CHUVA on German High Altitude Long Range Research Aircraft (HALO). took place September/October...
Abstract. The indirect effect of atmospheric aerosol particles on the Earth's radiation balance remains one most uncertain components affecting climate change throughout industrial period. large uncertainty is partly due to incomplete understanding aerosol–cloud interactions. One objective GoAmazon2014/5 and ACRIDICON (Aerosol, Cloud, Precipitation, Radiation Interactions Dynamics Convective Cloud Systems)-CHUVA (Cloud Processes Main Precipitation Systems in Brazil) projects was understand...
The emergence of antibiotic-resistant bacteria in coastal waters is a global health problem posing potential risks to the humans who depend on resources. Monitoring and increased efforts are needed maintain marine ecosystems. sea surface microlayer (SML) poorly studied for antibiotic resistance inhabiting bacteria. Therefore, we examined patterns 41 bacterial strains isolated from SML harbor southern North Sea. affiliated with 17 genera typically found environment. Using disc diffusion...
Abstract. During the ACRIDICON-CHUVA field project (September–October 2014; based in Manaus, Brazil) aircraft-based in-situ measurements of aerosol chemical composition were conducted tropical troposphere over Amazon using High Altitude and Long Range Research Aircraft (HALO), covering altitudes from boundary layer height up to 14.4 km. The submicron non-refractory was characterized by flash-vaporization/electron impact-ionization particle mass spectrometry. results show that significant...
Abstract. Vast quantities of agricultural land in southern and central Africa are burnt between June September each year, which releases large concentrations aerosols into the atmosphere. The resulting smoke plumes carried west over Atlantic Ocean at altitudes 2 4 km. As only limited observational data West have existed until now, whether this pollution has an impact lower remained unclear. Dynamics-Aerosol-Chemistry-Cloud Interactions (DACCIWA) aircraft campaign took place during July 2016,...
Abstract. Long-range transport (LRT) plays an important role in the Amazon rain forest by bringing different primary and secondary aerosol particles from distant sources. The atmospheric oxidation of dimethyl sulfide (DMS), emitted marine plankton, is considered sulfate source over forest, with a lesser contribution terrestrial soil vegetation sulfur emissions. Volcanic emissions Africa could be particulate to Amazonian atmosphere upon transatlantic but no observations have been published....
Abstract. We present a novel and compact design of constant pressure inlet (CPI) developed for use in airborne aerosol mass spectrometry. In particular the system is optimized aerodynamic lenses commonly used spectrometers, where efficient focusing particles into vacuum chamber requires precisely controlled lens pressure, typically few hPa. The CPI device can also be gas phase sampling instruments large range altitude pressure. achieved by changing inner diameter properly scaled O-ring that...