E. Weingartner
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Mass absorption cross-section of ambient black carbon aerosols - a review Open
An accurate assessment of black carbon (BC) climate and health impacts requires knowledge of its mass absorption cross-section (MAC BC ) – a parameter linking optical and mass measurements. The mean MAC BC for freshly emitted soot typicall…
Atmospheric black carbon mass absorption cross-section: a literature review Open
Black carbon (BC) aerosol particles are emitted by the incomplete combustion of carbonaceous fuels. These particles absorb solar radiation and BC-dominated aerosol mixtures with low single scattering albedo have a positive radiative forcin…
View article: Estimating Mycobacterium tuberculosis transmission in a South African clinic: Spatiotemporal model based on person movements
Estimating Mycobacterium tuberculosis transmission in a South African clinic: Spatiotemporal model based on person movements Open
The risk of Mycobacterium tuberculosis (Mtb) transmission can be high in crowded clinics. We developed a spatiotemporal model of airborne Mtb transmission based on the Wells-Riley equation. We collected environmental, clinical and person-t…
Air Cleaners and Respiratory Infections in Schools: A Modeling Study Based on Epidemiologic, Environmental, and Molecular Data Open
Background Using a multiple-measurement approach, we examined the real-world effectiveness of portable HEPA air filtration devices (air cleaners) in a school setting. Methods We collected data over 7 weeks during winter 2022/2023 in 2 Swis…
Air cleaners and respiratory infections in schools: A modeling study using epidemiological, environmental, and molecular data Open
Background Using a multiple-measurement approach, we examined the real-world effectiveness of portable HEPA-air filtration devices (air cleaners) in a school setting. Methods We collected environmental (CO 2 , particle concentrations), epi…
A novel measurement system for unattended, in situ characterization of carbonaceous aerosols Open
Carbonaceous aerosol is a relevant constituent of the atmosphere in terms of climate and health impacts. Nevertheless, measuring this component poses many challenges. There is currently no simple and sensitive commercial technique that can…
Comment on ar-2023-11 Open
Abstract. Carbonaceous aerosol is a relevant constituent of the atmosphere in terms of climate and health impacts. Nevertheless, measuring this component poses many challenges. There is currently no simple and sensitive commercial techniqu…
A novel measurement system for unattended, in-situ characterisation of carbonaceous aerosols Open
Carbonaceous aerosol is a relevant constituent of the atmosphere in terms of climate and health impacts. Nevertheless, measuring this component poses many challenges. There is currently no simple and sensitive commercial technique that can…
Miniaturization of on-chip interferometers for photonic sensing applications Open
On-chip photonic integration has opened up the potential for low-cost, high-performance photonic sensor devices [1]. Here, we present a miniaturized on-chip Mach-Zehnder Interferometer (MZI) based on planar polymer waveguide technology. Th…
A dual-wavelength photothermal aerosol absorption monitor: design, calibration and performance Open
There exists a lack of aerosol absorption measurement techniques with low uncertainties and without artefacts. We have developed the two-wavelength Photothermal Aerosol Absorption Monitor (PTAAM-2λ), which measures the aerosol absorption c…
Single Aerosol Particle Detection by Acoustic Impaction Open
A new measurement method has been developed that enables an acoustic detection of individual coarse mode particles (aerodynamic particle diameter > 1 µm) by impaction on a piezo transducer.The aerosol is accelerated and each momentum trans…
Comment on amt-2022-21, Drinovec et al. 2022 Open
Abstract. There exists a lack of aerosol absorption measurement techniques with low uncertainties and without artefacts. We have developed the two-wavelength Photothermal Aerosol Absorption Monitor (PTAAM-2λ), which measures the aerosol a…
A dual-wavelength photothermal aerosol absorption monitor: design, calibration and performance Open
There exists a lack of aerosol absorption measurement techniques with low uncertainties and without artefacts. We have developed a two-wavelength Photothermal Aerosol Absorption Monitor (PTAAM-2λ), which measures the aerosol absorption coe…
Comparing black-carbon- and aerosol-absorption-measuring instruments – a new system using lab-generated soot coated with controlled amounts of secondary organic matter Open
We report on an inter-comparison of black-carbon- and aerosol-absorption-measuring instruments with laboratory-generated soot particles coated with controlled amounts of secondary organic matter (SOM). The aerosol generation setup consiste…
Comparing black-carbon- and aerosol-absorption-measuring instruments – a new system using lab-generated soot coated with controlled amounts of secondary organic matter Open
A preprint of the publication can be found here: AMTD - Response of black carbon and aerosol absorption measuring instruments to laboratory-generated soot coated with controlled amounts of secondary organic matter (copernicus.org) (doi.org…
Comparing black-carbon- and aerosol-absorption-measuring instruments – a new system using lab-generated soot coated with controlled amounts of secondary organic matter Open
A preprint of the publication can be found here: AMTD - Response of black carbon and aerosol absorption measuring instruments to laboratory-generated soot coated with controlled amounts of secondary organic matter (copernicus.org) (doi.org…
Comment on amt-2021-214 Open
Abstract. We report on an inter-comparison of black-carbon- and aerosol-absorption-measuring instruments with laboratory-generated soot particles coated with controlled amounts of secondary organic matter (SOM). The aerosol generation setu…
A global study of hygroscopicity-driven light-scattering enhancement in the context of other in situ aerosol optical properties Open
The scattering and backscattering enhancement factors (f(RH) and fb(RH)) describe how aerosol particle light scattering and backscattering, respectively, change with relative humidity (RH). They are important parameters in estimating direc…
Comment on amt-2021-214 Open
Abstract. We report on an inter-comparison of black-carbon- and aerosol-absorption-measuring instruments with laboratory-generated soot particles coated with controlled amounts of secondary organic matter (SOM). The aerosol generation setu…
Response of black carbon and aerosol absorption measuring instruments to laboratory-generated soot coated with controlled amounts of secondary organic matter Open
We report on an inter-comparison of black carbon and aerosol absorption measuring instruments with laboratory-generated soot particles coated with controlled amounts of secondary organic matter (SOM). The aerosol generation setup consisted…
A global study of hygroscopicity-driven light scatteringenhancement in the context of other in-situ aerosol optical properties Open
The scattering and backscattering enhancement factors (f(RH) and fb(RH)) describe how aerosol particle light scattering and backscattering, respectively, change with relative humidity (RH). They are important parameters in estimating direc…
A single-beam photothermal interferometer for in situ measurements of aerosol light absorption Open
We have developed a novel single-beam photothermal interferometer and present here its application for the measurement of aerosol light absorption. The use of only a single laser beam allows for a compact optical set-up and significantly e…
A global model–measurement evaluation of particle light scattering coefficients at elevated relative humidity Open
The uptake of water by atmospheric aerosols has a pronounced effect on particle light scattering properties, which in turn are strongly dependent on the ambient relative humidity (RH). Earth system models need to account for the aerosol wa…
A single-beam photothermal interferometer for in-situ measurements of aerosol light absorption Open
We have developed a novel single-beam photothermal interferometer and present here its application for the measurement of aerosol light absorption. The use of only a single laser beam allows for a compact optical set up and significantly e…
Supplementary material to "A single-beam photothermal interferometer for in-situ measurements of aerosol light absorption" Open
Adaptation of the PTI equation for a focused laser beam with Gaussian beam profileHere, we calculate the phase shift in our modulated single-beam PTI (MSPTI) for a fundamental (or TEM00) transverse Gaussian mode.This calculation can be exp…
Supplementary material to "A global model-measurement evaluation of particle light scattering coefficients at elevated relative humidity" Open
Supplementary material for "A global model-measurement evaluation of particle light scattering coefficients at elevated relative humidity" Burgos et al.-Figure S1 shows the location of the in situ measurement sites used in this study.The s…
A global model-measurement evaluation of particle light scattering coefficients at elevated relative humidity Open
The uptake of water by atmospheric aerosols has a pronounced effect on particle light scattering properties which in turn are strongly dependent on the ambient relative humidity (RH). Earth system models need to account for the aerosol wat…