A5074889418- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Vehicle emissions and performance
- Geophysics and Gravity Measurements
- Water Quality Monitoring and Analysis
- Oil Spill Detection and Mitigation
- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- Optical Imaging and Spectroscopy Techniques
- Maritime Transport Emissions and Efficiency
- Advanced Clustering Algorithms Research
- Ocean Acidification Effects and Responses
- Spectroscopy and Laser Applications
- Spectroscopy and Chemometric Analyses
- Maritime Navigation and Safety
Max Planck Institute for Chemistry
2022-2025
Abstract. The tropospheric concentrations of nitrogen dioxide (NO2) and formaldehyde (HCHO) have high spatio-temporal variability, in situ observations these trace gases are still scarce, especially remote background areas. We made four similar circling journeys mobile multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements the Three Rivers' Source region over Tibetan Plateau summer (18–30 July) 2021 for first time. slant column densities (DSCDs) NO2 HCHO were...
Nitrogen dioxide (NO2) plays a key role in the formation of urban smog and its adverse impact on human health. However, routinely deployed measurements NO2 are essentially limited to:tropospheric columns with global daily coverage, measured by TROPOMI satellite instrument horizontal resolution up to 3.5 x 5.5 km2 near-surface concentrations, situ instruments at typically 0-8 m above ground sparse spatial coverage profiles from MAX-DOAS measurements, extremely significant retrieval...
Stratospheric bromine originates partly from natural and anthropogenic sources. After the Montreal protocol following amendments, emissions (halons methyl bromide) were largely reduced. This reduction was not only seen in tropospheric situ measurements, but also a of stratospheric levels (estimated BrO measurements) after about 2002.Here, we report on ground-based observations carried out between 1995 present Kiruna (northern Sweden). The (slant) column density is analysed UV spectra zenith...
This study investigates horizontal gradients of aerosols and trace gases using a rooftop-mounted MAX-DOAS instrument located at the Max Planck Institute for Chemistry in Mainz. Horizontal inhomogeneities, especially urban areas or near strong emission sources, can significantly affect accuracy profile retrievals, as these typically assume horizontally homogeneous atmospheric conditions. The experimental setup allows measurements two azimuthal directions (possibly extended to 4 azimuth...
Nitrogen Oxides (NO­x, i.e., NO and NO2) are major contributors to local air pollution. They negatively affect human health play an essential role in tropospheric chemistry. While quality concerns often focusing on heavy road traffic seagoing ships, long-lasting diesel engines of inland waterway vessels can also be strong NOx emitters might represent a significant pollution source. The Rhine River, Europe’s most important busiest waterway, connects key seaports, industrial...
The third Cabauw Intercomparison of UV-Vis DOAS Instruments (CINDI-3) took place from May 21st to the 24th June 2024 at Experimental Site for Atmospheric Research (CESAR), a semi-rural observational facility managed by Dutch Meteorological Institute close cities Rotterdam and Utrecht in Netherlands. Its main objective was intercompare MAX-DOAS instrument types targeting nitrogen dioxide, ozone, aerosols several other reactive gases such as formaldehyde, glyoxal BrO, with aim assess their...
Chlorine dioxide (OClO) is a by-product of the ozone depleting halogen chemistry in stratosphere. Although being rapidly photolysed during daytime, it plays an important role as indicator chlorine activation polar regions winter and spring under twilight conditions because nearly linear dependence its formation on oxide (ClO).The TROPOspheric Monitoring Instrument (TROPOMI) UV-VIS-NIR-SWIR instrument board Sentinel-5P satellite developed for monitoring composition Earth’s...
Cloud properties play an important role in the evaluation and interpretation of Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) measurements. Clouds strongly influence length atmospheric light paths, are thus for deriving aerosol optical depth (AOD) vertical column density (VCD) trace gases from MAX-DOAS As such, information about cloud is to interpret data. This study focuses on comparing three methods derive which can be run conjunction with measurements, allowing a more...
Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) measurements use trace gas absorptions in spectra of scattered sun light recorded under different elevation angles to retrieve vertical profiles concentrations and aerosol extinctions the lower troposphere as well corresponding total tropospheric column densities (VCDs). These allow observation multiple gases e.g., formaldehyde (HCHO) glyoxal (CHOCHO), for same air mass simultaneously with one instrument. We operate two...
Halogen chemistry is a central element of tropospheric ozone depletion events (ODEs) during polar spring. Key processes such as source mechanisms that produce reactive halogen species, their transport, and interhalogen interactions well the influence quickly changing climate, however, remain in centre Arctic research.We deployed Long-Path Differential Optical Absorption Spectroscopy (LP-DOAS) instrument Utqiagvik (formerly Barrow), Alaska, December 2023. First results from measurements...
The third Cabauw intercomparison of DOAS-type instruments (CINDI-3) campaign took place at the CESAR measurement site near Cabauw, Netherlands in June 2024. Stationary DOAS were supported by mobile platforms: cars, a bike and an airplane mapped horizontal distribution trace gases regions around Rotterdam Cabauw. In this work, we combine information gained from all platforms to obtain nitrogen dioxide (NO2). During additional MAX-DOAS set up along main viewing azimuth direction investigate...
Glyoxal (CHOCHO) is an intermediate product of the oxidation volatile organic compounds (VOCs) and has anthropogenic, biogenic pyrogenic sources. It indicator formation secondary aerosols in atmosphere plays a role photochemical reactions ozone troposphere. Additionally, at high concentrations glyoxal harmful for humans. The lifetime short (a few hours) it removed from by photolysis, OH, deposition. Due to different sources glyoxal, its abundance can vary between several parts per trillion...
Abstract. Instruments for air quality observations on geostationary satellites provide multiple per day and allow the analysis of diurnal variation in important pollutants such as nitrogen dioxide (NO2). The South Korean instrument GEMS (Geostationary Environmental Monitoring Spectrometer), launched February 2020, is first that able to observe NO2. measurements have a spatial resolution 3.5 km × 8 cover large part Asia. This study compares 1 year tropospheric NO2 vertical column density...
Abstract. Instruments for air quality observations on geostationary satellites provide multiple per day and allow the analysis of diurnal variation important pollutants such as nitrogen dioxide (NO2) over large areas. The South Korean instrument GEMS GK2B satellite was launched in February 2020 is first orbit that delivers hourly daytime NO2. measurements with a spatial resolution 3.5 km x 8 cover part Asia. This study compares one year tropospheric NO2 vertical column density (VCD)...
The UV–Visible Working Group of the Network for Detection Atmospheric Composition Changes (NDACC) focuses on monitoring air-quality-related stratospheric and tropospheric trace gases in support trend analysis, satellite validation model studies. Tropospheric measurements are based MAX-DOAS-type instruments that progressively emerged years 2010 onward. In interest improving overall consistency NDACC MAX-DOAS network facilitating its further extension to benefit validation, ESA initiated, late...
We provide a global database of SO2 emissions from point sources generated TROPOMI observations (COBRA product) for the time range May 2018 to July 2022. Our algorithm derives advection by combining column densities and ERA5 wind fields, i.e., taking product vertical density gradient horizontally projected speed. In addition, several corrections, e.g., satellite sensitivity topography, are applied. For each source, error estimates given, considering uncertainties various retrieval steps.A...
Nitrogen oxides (NOx, i.e., NO and NO2) are a major contributor to urban air pollution. They have negative impacts on human health play an important role in tropospheric chemistry. NO2 causes respiratory cardiovascular problems is precursor of secondary particulate matter ozone, which also associated with adverse effects health. Long-lasting diesel engines inland waterway vessels operate at high temperatures strong NOx emitters. These emissions concentrated the vicinity waterways potential...
Nitrogen dioxide (NO2) is one of the most important air pollutants in troposphere. NO2 can be retrieved by differential optical absorption spectroscopy measurements, which performed from various platforms. Measurements low earth satellites sun-synchronous orbits provide a global overview and have already contributed valuable insights into understanding NO2. The latest instrument, TROPOMI, with its high spatial resolution 3.5 x 5.5 km2, has given new opportunities to disentangle analyze NOx...
Characterizing the light path through atmosphere is a fundamental challenge in Differential Optical Absorption Spectroscopy (DOAS). Clouds strongly influence paths and thus interpretation further use of measurements. In this context, it important to receive information about cloud cover field view Multi-AXis-DOAS (MAX-DOAS) instrument. A method for extracting from measured spectra themselves was introduced by Wagner et al. (2014, 2016). They developed an algorithm determine classify sky...
Multi-AXis (MAX)-Differential Optical Absorption Spectroscopy (DOAS) measurements use trace gas absorptions in spectra of scattered sun light recorded under different elevation angles to retrieve vertical profiles concentrations and aerosol extinctions the lower troposphere as well corresponding total tropospheric column densities (VCDs). A major advantage this kind is possibility observe multiple gases e.g., formaldehyde (HCHO), glyoxal (CHOCHO) nitrogen dioxide (NO2), for same air mass...
Halogen chemistry is a central element of tropospheric ozone depletion events (ODEs) during polar spring. However, key processes such as source mechanisms reactive halogen species, their transport, and interhalogen interactions are still not fully understood. Further, quickly changing Arctic climate expected to have strong impact on activation ODEs, but more research needed make meaningful predictions about these changes.We deployed Long-Path Differential Optical Absorption Spectroscopy...
Transit cruises of German research vessels across the great oceans provide a unique platform for Multi AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) measurements atmospheric trace gases such as nitrogen dioxide (NO2), formaldehyde (HCHO) and sulphur (SO2) in pristine locations. Here, we present results Extra Atmospheric References Satellites (EARS) campaign which took place from 16th May to 4th June 2023. During that period vessel Meteor was transit Walvis Bay (Namibia) Las...