Nicole Bobrowski
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View article: VOLCANO <sub>3</sub> – A Miniaturized Chemiluminescence Ozone Monitor for Drone-Based Measurements in Volcanic Plumes
VOLCANO <sub>3</sub> – A Miniaturized Chemiluminescence Ozone Monitor for Drone-Based Measurements in Volcanic Plumes Open
High levels of bromine monoxide (BrO) observed in volcanic plumes indicate significant catalytic destruction of tropospheric ozone (O3) at local to regional scales. The underlying chemical mechanisms are still poorly understood and the qua…
View article: Volcanic vents &#8211; OH mixing ratios as in a Bunsen burner flame?
Volcanic vents – OH mixing ratios as in a Bunsen burner flame? Open
Volcanic gas emissions influence the composition of the atmosphere and therefore also our climate. For some gas species, volcanoes represent even the most important natural source. In atmospheric research, however, volcanoes are often negl…
View article: First deployment of a drone-borne active AirCore in a volcanic plume at Mount Etna
First deployment of a drone-borne active AirCore in a volcanic plume at Mount Etna Open
Uncrewed Aircraft Systems (UAS) are by now established platforms for measurements in volcanic plumes. Trace gases of interest range from sulfur dioxide and halogenated substances to carbonaceous trace gases including carbon monoxide (CO) a…
View article: Feasibility of volcanic CO2, HF, and HCl remote sensing measurements using Fourier-transform infrared spectrometry in scattered sunlight geometry
Feasibility of volcanic CO2, HF, and HCl remote sensing measurements using Fourier-transform infrared spectrometry in scattered sunlight geometry Open
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 volcanic structures. Due to its chemical inertness, CO…
View article: Corrigendum to “Chemical variability in volcanic gas plumes and fumaroles along the East African Rift System: New insights from the Western Branch” [Chemical Geology 596 (2022) 120811]
Corrigendum to “Chemical variability in volcanic gas plumes and fumaroles along the East African Rift System: New insights from the Western Branch” [Chemical Geology 596 (2022) 120811] Open
The authors regret that data from literature about the composition of the gas plume of the Nyamulagira volcano (green coloured field for 2014 measurements; Bobrowski et al., 2017b) was incorrectly plotted in Fig. 2a. This mistake is linked…
View article: Magmatic Activity in Incipient Continental Break-Up as Revealed by Coupling Melt and Fluid Inclusions
Magmatic Activity in Incipient Continental Break-Up as Revealed by Coupling Melt and Fluid Inclusions Open
Deciphering deep magmatic processes driving the onset of continental break-up is fundamental to constrain our understanding of plate tectonics. The East African Rift System (EARS) represents the only opportunity to study a currently active…
View article: Preparation of low-concentration H <sub>2</sub> test gas mixtures in ambient air for calibration of H <sub>2</sub> sensors
Preparation of low-concentration H <sub>2</sub> test gas mixtures in ambient air for calibration of H <sub>2</sub> sensors Open
Using electrochemical gas sensors for quantitative measurements of trace gas components in ambient air introduces several challenges, of which interference, drift and aging of the sensor are the most significant. Frequent and precise calib…
View article: Development of a drone-based measurement system for real-time monitoring of volcanic gas composition
Development of a drone-based measurement system for real-time monitoring of volcanic gas composition Open
Studying volcanic gas emissions is an important method to obtain information about volcanic systems and providing insight into magmatic processes. MultiGAS instruments allow to measure SO2 and CO2, alongside meteorological data which are i…
View article: Reliable Ozone Measurements in Volcanic Plumes: A Way to Resolve the Volcanic Ozone Enigma
Reliable Ozone Measurements in Volcanic Plumes: A Way to Resolve the Volcanic Ozone Enigma Open
In addition to CO2 and sulphur dioxide (SO2), volcanic plumes also contain reactive halogen species. Bromine monoxide (BrO) can reliably be quantified by remote sensing measurements and is known to catalyse ozone (O3) destruction. Therefor…
View article: Halogen activation in volcanic plumes: Studies at Mt Etna (Italy) 2022 and 2023
Halogen activation in volcanic plumes: Studies at Mt Etna (Italy) 2022 and 2023 Open
Halogens in volcanic plumes are important for both volcanic and environmental research. For example, changes in the composition of the volcanic plume can be an indication of changes in the activity of the volcano. Volcanic emissions consis…
View article: A new accurate retrieval algorithm of bromine monoxide columns inside minor volcanic plumes from Sentinel-5P TROPOMI observations
A new accurate retrieval algorithm of bromine monoxide columns inside minor volcanic plumes from Sentinel-5P TROPOMI observations Open
Bromine monoxide (BrO) is a key radical in the atmosphere, influencing the chemical state of the atmosphere, most notably the abundance of ozone (O3). O3 depletion caused by the release of bromine has been observed and modeled in polar reg…
View article: Geochemical characterization of volcanic gas emissions at Santa Ana and San Miguel volcanoes, El Salvador, using remote-sensing and in situ measurements
Geochemical characterization of volcanic gas emissions at Santa Ana and San Miguel volcanoes, El Salvador, using remote-sensing and in situ measurements Open
Volcanic degassing provides important information for the assessment of volcanic hazards. Santa Ana and San Miguel are open vent volcanoes along the Central American Volcanic Arc–CAVA, where the magmatism, basaltic to dacitic, is related t…
View article: A new accurate retrieval of bromine monoxide inside minor volcanic plumes from Sentinel-5 Precursor/TROPOMI
A new accurate retrieval of bromine monoxide inside minor volcanic plumes from Sentinel-5 Precursor/TROPOMI Open
Bromine monoxide (BrO) is a key radical in the atmosphere, influencing the chemical state of the atmosphere, most notably the abundance of ozone. The main effect of BrO onto tropospheric ozone concentrations occurs in bromine release event…
View article: Quantifying BrO and SO2 distributions in volcanic plumes—Recent advances in imaging Fabry-Pérot interferometer correlation spectroscopy
Quantifying BrO and SO2 distributions in volcanic plumes—Recent advances in imaging Fabry-Pérot interferometer correlation spectroscopy Open
Bromine monoxide (BrO) and sulphur dioxide (SO 2 ) are two gases frequently observed in volcanic plumes by spectroscopic techniques capable of continuous gas monitoring like, e.g., Differential Optical Absorption Spectroscopy (DOAS). The s…
View article: Investigation of three-dimensional radiative transfer effects for UV–Vis satellite and ground-based observations of volcanic plumes
Investigation of three-dimensional radiative transfer effects for UV–Vis satellite and ground-based observations of volcanic plumes Open
We investigate effects of the three-dimensional (3D) structure of volcanic plumes on the retrieval results of satellite and ground-based UV–Vis observations. For the analysis of such measurements, 1D scenarios are usually assumed (the atmo…
View article: High-spectral-resolution Fabry-Pérot interferometers overcome fundamental limitations of present volcanic gas remote sensing techniques
High-spectral-resolution Fabry-Pérot interferometers overcome fundamental limitations of present volcanic gas remote sensing techniques Open
Remote sensing (RS) of volcanic gases has become a central tool for studying volcanic activity. For instance, ultraviolet (UV) skylight spectroscopy with grating spectrographs (GS) enables SO 2 (and, under favourable conditions, BrO) quant…
View article: Halogens as tracers for magma evolution from the mantle source to the atmosphere – insights from simultaneous probing of tephra fallout and gas phase in the volcanic plume
Halogens as tracers for magma evolution from the mantle source to the atmosphere – insights from simultaneous probing of tephra fallout and gas phase in the volcanic plume Open
Besides H2O, CO2 and sulphur, halogens (F, Cl, Br, I) are important volatile components in magmas. The extremely high chemical activity of halogens in melts and liquids leads to a significant influence on (a) magmatic properties, (b) the d…
View article: Investigation of 3D-effects for UV/vis satellite observations of volcanic plumes
Investigation of 3D-effects for UV/vis satellite observations of volcanic plumes Open
Usually, horizontally homogenous atmospheric properties are assumed for the analysis of satellite observations of atmospheric trace gases. While for most atmospheric quations, this simplification causes only small to moderate errors, for t…
View article: Rapid gas measurements in volcanic plumes with UAVs: online and offline measurements of various trace gases with light UAVs
Rapid gas measurements in volcanic plumes with UAVs: online and offline measurements of various trace gases with light UAVs Open
To protect people and infrastructures in the immediate vicinity of active volcanoes, monitoring the gas composition of the emitted plume is crucial. In order to react quickly to sudden changes in this composition, frequent measurements are…
View article: Detection of chlorine, bromine and bromine chloride (BrCl) in volcanic emissions: Studies at Mt. Etna (Italy), 2022
Detection of chlorine, bromine and bromine chloride (BrCl) in volcanic emissions: Studies at Mt. Etna (Italy), 2022 Open
Halogens in volcanic plumes are important for both volcanic and environmental research. For example, changes in the composition of the volcanic plume can be an indication of changes in the activity of the volcano. Volcanic emissions consis…
View article: Bromine monoxide composition in volcanic plumes measured by S-5P/TROPOMI – Global survey of magmatic composition
Bromine monoxide composition in volcanic plumes measured by S-5P/TROPOMI – Global survey of magmatic composition Open
Bromine monoxide (BrO) is a halogen radical influencing atmospheric chemical processes, in particular the abundance of ozone, e. g. in the polar boundary layer and above salt lakes, in the stratosphere as well as in volcanic plumes. Furthe…
View article: The Interface Between Magma and Earth's Atmosphere
The Interface Between Magma and Earth's Atmosphere Open
Volatiles released from magma can form bubbles and leave the magma body to eventually mix with atmospheric air. The composition of those volatiles, as derived from measurements made after their emission, is used to draw conclusions on proc…
View article: Comment on amt-2022-253
Comment on amt-2022-253 Open
Abstract. We investigate effects of the three-dimensional (3D) structure of volcanic plumes on the retrieval results of satellite and ground-based UVâVis observations. For the analysis of such measurements, 1D scenarios are usually assum…
View article: Comment on amt-2022-253
Comment on amt-2022-253 Open
Abstract. We investigate effects of the three-dimensional (3D) structure of volcanic plumes on the retrieval results of satellite and ground-based UVâVis observations. For the analysis of such measurements, 1D scenarios are usually assum…
View article: Investigation of 3D-effects for UV/vis satellite and ground based observations of volcanic plumes
Investigation of 3D-effects for UV/vis satellite and ground based observations of volcanic plumes Open
We investigate effects of the 3-dimensional (3D) structure of volcanic plumes on the retrieval results of satellite and ground based UV-vis observations. For the analysis of such measurements usually 1D scenarios are assumed (the atmospher…
View article: Observing volcanoes with drones: studies of volcanic plume chemistry with ultralight sensor systems
Observing volcanoes with drones: studies of volcanic plume chemistry with ultralight sensor systems Open
The study of the chemical composition of volcanic emissions is an important method for obtaining information about volcanic systems and providing indirect and unique insights into magmatic processes. However, there is a non-negligible risk…
View article: Halogen measurements with in-situ sampling techniques: Studies at Vulcano and Mt. Etna (Italy)
Halogen measurements with in-situ sampling techniques: Studies at Vulcano and Mt. Etna (Italy) Open
<p>Halogens in volcanic plumes are important for both volcanic and environmental research. For example, changes in the composition of the volcanic plume can be an indication of changes in the activity of the volcano. In addition to e…
View article: Chemical characterization of volcanic plumes with multifunction UAVs and extra-lightweight drones: Concepts and first applications
Chemical characterization of volcanic plumes with multifunction UAVs and extra-lightweight drones: Concepts and first applications Open
<p>Investigating the chemical composition of volcanic plumes is an important method for obtaining geochemical information of volcanic systems, determining the environmental impact of volcanic outgassing and providing indications of i…