A5041851654- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Spectroscopy and Laser Applications
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Microbial Community Ecology and Physiology
- Transboundary Water Resource Management
- Environmental Toxicology and Ecotoxicology
- Climate Change and Geoengineering
- Amphibian and Reptile Biology
- Wind and Air Flow Studies
- Isotope Analysis in Ecology
- Pesticide and Herbicide Environmental Studies
- Global Security and Public Health
- Environmental DNA in Biodiversity Studies
Heidelberg University
2022-2024
University of Koblenz and Landau
2021-2024
University of Kaiserslautern
2023
Universität Koblenz
2021
Current spectrometers provide high-quality absorption spectra from both ground-based direct sun measurements and spaceborne backscatter measurements. Accurate retrievals of atmospheric CO2 concentrations these measured are fundamental for modelling large-scale atmosphere-surface exchange fluxes. When retrieving spectra, spectroscopic reference data essential to drive radiative transfer simulations enable accurate retrievals. Here, we investigate how various modern molecular cross-section...
Carbon dioxide (CO2) is usually the second most abundant gas in volcanic plumes. Its early dissolution from rising magmas can allow insights into magmatic source regions and subsurface structures. Due to its chemical inertness, CO2 measurements are particularly valuable for studying plume chemistry using as a mixing tracer. The also relatively gases, hydrogen fluoride (HF) chloride (HCl), dissolve at shallower depths. Their measurements, along with those of other halogen sulfur compounds,...
Estimating emissions of trace gases into the lower troposphere requires accurate concentration measurements species interest. Most commonly, they are provided by networks in-situ sensors or remote sensing instruments on satellites. In high-gradient environments (e.g. urban settings), only spatially representative for a small area. On other hand, many satellites average kilometer scale which also aggregation data inversion modelling takes place. But can provide sunny weather conditions, at...
Remote sensing of trace gases in the atmosphere can be performed with numerous spectrometers relying on different sources light. Incoherent such as those found typical Fourier transform provide broad spectral coverage, thus allowing to measure signatures from multiple species simultaneously. However, this comes at cost limited sensitivity and resolution. On other hand, coherent lasers offer high brightness resolution, resulting selectivity coverage. Developed since advent optical frequency...
Abstract. Monitoring the atmospheric concentrations of greenhouse gases (GHG) carbon dioxide (CO2) and methane (CH4) is a key ingredient for fostering our understanding mechanisms behind sources sinks these verifying quantitatively attributing their anthropogenic emissions. Here, we present instrumental setup performance evaluation an open-path GHG observatory in city Heidelberg, Germany. The measures path-averaged CO2 CH4 along 1.55 km path urban boundary layer above city. We combine data...
Abstract SETAC has a long-standing history of supporting students and early career scientists in the fields ecotoxicology environmental chemistry. The Student Advisory Council (SAC) advocates for diverse interests young members offering guidance to peers serving as resounding voice aspiring dialogues with Europe Council. Founded shaped by rewarding liaison between its German Language Branch, SAC now strong international representation, being distributed all over Europe. With this...
Mapping the greenhouse gases carbon dioxide (CO2) and methane (CH4) above source regions, such as urban areas, can deliver insights into distribution dynamics of local emission patterns. To this end, we conduct ground-based measurements in reflected-sun geometry, where a NIR spectrometer an elevated position points downward at shallow viewing angles observes reflected sunlight from target area. From spectra, infer CO2 CH4 concentrations integrated along long (>10 km) horizontal...
Urban areas are a major and growing contributor to anthropogenic greenhouse gas (GHG) emissions thus an important target for emission reduction efforts. However, measurement-based information planning, implementing, monitoring such efforts on city scales is rarely available policymakers stakeholders. Such systems typically rely three key components: measurements of GHG concentrations (or turbulent fluxes), modeling the atmospheric transport prior spatial and/or temporal structure emissions....
Carbon dioxide (CO2) emissions are the major driver of anthropogenic climate change. While strong point sources contribute significantly to overall emissions, their source strength is not always well quantified by bottom-up estimates or in situ measurements. Passive remote sensing CO2 could provide a simple tool substantially refine estimates. However, current approaches from ground-based space-borne platforms only suit exceptionally emitters. We propose imaging technique based on...
Abstract. Mapping the greenhouse gases (GHGs) carbon dioxide (CO2) and methane (CH4) above source regions such as urban areas can deliver insights into distribution dynamics of local emission patterns. Here, we present prototype development an initial performance evaluation a portable spectrometer that allows for measuring CO2 CH4 concentrations integrated along long (>10 km) horizontal path component through atmospheric boundary layer target region. To this end, is positioned at elevated...
Quantifying sources and sinks, as well chemical activity of trace gases in the lower troposphere, requires accurate measurements concentrations species interest. While there exist in-situ measurement techniques, which are highly accurate, point-like only sufficiently representative spatial domain for a small area. This holds true particular high-gradient environments, e.g., urban settings. Hence, measuring those averaged on length scale few kilometers is desirable. Furthermore, quantifying...
Abstract. Mapping the greenhouse gases carbon dioxide (CO2) and methane (CH4) above source regions such as urban areas can deliver insights into distribution dynamics of local emission patterns. Here, we present prototype development an initial performance evaluation a portable spectrometer that allows for measuring CO2 CH4 concentrations integrated along long (>10 km) horizontal path component through atmospheric boundary layer target region. To this end, is positioned at elevated site...
Abstract. Monitoring the atmospheric concentrations of greenhouse gases (GHG) carbon dioxide CO2 and methane CH4 is a key ingredient for fostering our understanding mechanisms behind sources sinks these verifying quantitatively attributing their anthropogenic emissions. Here, we present instrumental setup performance evaluation an open-path GHG observatory in city Heidelberg, Germany. The measures path-averaged along 1.55 km path urban boundary layer above city. We are combining data with...
<p>Quantifying sources and sinks, as well photochemical activity of trace gases in the lower troposphere, requires accurate measurements concentrations species interest. While there exist in-situ measurement techniques, which are highly accurate, point-like tend to suffer from insufficient representativeness, especially true for high-gradient environments, e.g., an urban setting. Hence, measuring those averaged on length scales a few kilometers is desirable. Further,...
<p>Carbon Dioxide (CO<sub>2</sub>) is the most important anthropogenic greenhouse gas driving global climate change. Strong point sources like coal-fired power plants contribute roughly 30% to CO<sub>2</sub> emissions. Precise knowledge about distribution and strength of these target many ongoing planned research missions, e.g., Orbiting Carbon Observatory-2 (OCO2, Wu et al., 2018), Copernicus CO2 Monitoring (CO2M, Sierk...