Marvin Knapp
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View article: Towards routine shipborne measurements of columnar CO <sub>2</sub> , CH <sub>4</sub> , CO, and NO <sub>2</sub> : a case study for tracking regional-scale emission patterns
Towards routine shipborne measurements of columnar CO <sub>2</sub> , CH <sub>4</sub> , CO, and NO <sub>2</sub> : a case study for tracking regional-scale emission patterns Open
Mobile remote sensing observations from shipborne platforms offer a unique opportunity for validating satellite observations and sampling plumes of greenhouse gases and short-lived air pollutants from the world's highly populated coastal m…
View article: Madrid Methane Remote Sensing: first results of a landfill field campaign
Madrid Methane Remote Sensing: first results of a landfill field campaign Open
Methane (CH4) is known to be one of the most potent greenhouse gases (GHGs) and it plays a key role in climate change due to its high warming potential. It is of both natural and anthropogenic origin. The main anthropogenic emissions of CH…
View article: MethaneSAT: Quantifying Discrete and Dispersed Methane Sources on Basin-Scales
MethaneSAT: Quantifying Discrete and Dispersed Methane Sources on Basin-Scales Open
MethaneSAT is a satellite that observes the total column dry-air mole fraction of methane (XCH4) at high spatial resolution (100 m x 400 m) and precision (20 - 40 ppb) over target areas of 200 km x 200 km. Its observations uniquely enable …
View article: Quantitative imaging of carbon dioxide plumes using a ground-based shortwave infrared spectral camera
Quantitative imaging of carbon dioxide plumes using a ground-based shortwave infrared spectral camera Open
We present the first results of a ground-based imaging experiment using a shortwave infrared spectral camera to quantify carbon dioxide (CO2) emissions from a coal-fired power plant in Mannheim, Germany. The power plant emits more than 4.9…
View article: Quantifying anthropogenic methane emissions and their uncertainties using very high spatial and spectral resolution satellite and airborne data
Quantifying anthropogenic methane emissions and their uncertainties using very high spatial and spectral resolution satellite and airborne data Open
Methane is one of the most powerful greenhouse gases that has contributed to about a third of the 2010-2019 global warming relative to the pre-industrial times in 1850-1900. The Upper Silesian Coal Basin in southern Poland is one of the st…
View article: Towards Carbon Dioxide imaging using Fabry-P&#233;rot interferometer correlation spectroscopy
Towards Carbon Dioxide imaging using Fabry-Pérot interferometer correlation spectroscopy Open
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…
View article: Reply on RC2 of Reviewer 1
Reply on RC2 of Reviewer 1 Open
Abstract. We present the first results of a ground-based imaging experiment using a shortwave infrared spectral camera to quantify carbon dioxide (CO2) emissions from a coal-fired power plant in Mannheim, Germany. The power plant emits mor…
View article: Reply on RC1 of Reviewer 2
Reply on RC1 of Reviewer 2 Open
Abstract. We present the first results of a ground-based imaging experiment using a shortwave infrared spectral camera to quantify carbon dioxide (CO2) emissions from a coal-fired power plant in Mannheim, Germany. The power plant emits mor…
View article: Comment on egusphere-2023-1857
Comment on egusphere-2023-1857 Open
Abstract. We present the first results of a ground-based imaging experiment using a shortwave infrared spectral camera to quantify carbon dioxide (CO2) emissions from a coal-fired power plant in Mannheim, Germany. The power plant emits mor…
View article: Comment on egusphere-2023-1857
Comment on egusphere-2023-1857 Open
Abstract. We present the first results of a ground-based imaging experiment using a shortwave infrared spectral camera to quantify carbon dioxide (CO2) emissions from a coal-fired power plant in Mannheim, Germany. The power plant emits mor…
View article: Quantitative imaging of carbon dioxide plumes using a ground-based shortwave infrared spectral camera
Quantitative imaging of carbon dioxide plumes using a ground-based shortwave infrared spectral camera Open
We present the first results of a ground-based imaging experiment using a shortwave infrared spectral camera to quantify carbon dioxide (CO2) emissions from a coal-fired power plant in Mannheim, Germany. The power plant emits more than 4.9…
View article: Supplementary material to "Quantitative imaging of carbon dioxide plumes using a ground-based shortwave infrared spectral camera"
Supplementary material to "Quantitative imaging of carbon dioxide plumes using a ground-based shortwave infrared spectral camera" Open
Table S1.The table lists the GKM yearly electricity production [TWh] from their annual reports and reported carbon dioxide emissions [Mt] from the E-PRTR.The power plant emits 955 gCO2/kWh on average.
View article: Review on amt-2023-168
Review on amt-2023-168 Open
Abstract. Remote sensing has emerged as an important tool for the detection of methane plumes emitted by so-called point sources, which are common in the energy sector (e.g., oil and gas extraction and coal mining activities). In particula…
View article: Spectrometric imaging of sub-hourly methane emission dynamics from coal mine ventilation
Spectrometric imaging of sub-hourly methane emission dynamics from coal mine ventilation Open
Anthropogenic methane (CH 4 ) emissions contribute significantly to the current radiative forcing driving climate change. Localized CH 4 sources such as occurring in the fossil fuel industry contribute a substantial share to the anthropoge…
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: Quantifying emission dynamics of coal mine ventilation shafts with a stationary hyperspectral camera
Quantifying emission dynamics of coal mine ventilation shafts with a stationary hyperspectral camera Open
The global warming potential of methane on a 20-year scale is 80 times larger than that of carbon dioxide. Therefore reducing anthropogenic methane emissions can mitigate greenhouse gas-induced atmospheric warming in the short term. Thus, …
View article: Ground-based imaging of NO2 emission plumes from Bełchatów Power Station using a hyperspectral camera
Ground-based imaging of NO2 emission plumes from Bełchatów Power Station using a hyperspectral camera Open
Nitrogen oxides (NOx  = NO + NO2) are atmospheric pollutants that are detrimental to air quality and human health and play a major role in tropospheric ozone chemistry. Combustion processes produce NOx; thus, coal-fired power plants c…
View article: Towards Carbon Dioxide emission estimation with a stationary hyperspectral camera
Towards Carbon Dioxide emission estimation with a stationary hyperspectral camera Open
<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 global CO<sub>2</su…
View article: Versatile and Targeted Validation of Space-Borne XCO2, XCH4 and XCO Observations by Mobile Ground-Based Direct-Sun Spectrometers
Versatile and Targeted Validation of Space-Borne XCO2, XCH4 and XCO Observations by Mobile Ground-Based Direct-Sun Spectrometers Open
Satellite measurements of the atmospheric concentrations of carbon dioxide (CO 2 ), methane (CH 4 ) and carbon monoxide (CO) require careful validation. In particular for the greenhouse gases CO 2 and CH 4 , concentration gradients are min…
View article: Towards An Automated Ship-Borne Fourier-Transform Spectrometer As a Validation Opportunity For Atmospheric CO2, CH4, And CO Column Densities
Towards An Automated Ship-Borne Fourier-Transform Spectrometer As a Validation Opportunity For Atmospheric CO2, CH4, And CO Column Densities Open
<p>Validation opportunities for model data and satellite observations in the short-wave infra-red spectral range for climate monitoring are still sparse above the oceans. Klappenbach et al. (2015) and Knapp et al. (2020) developed a …
View article: Shipborne measurements of XCO <sub>2</sub> , XCH <sub>4</sub> , and XCO above the Pacific Ocean and comparison to CAMS atmospheric analyses and S5P/TROPOMI
Shipborne measurements of XCO <sub>2</sub> , XCH <sub>4</sub> , and XCO above the Pacific Ocean and comparison to CAMS atmospheric analyses and S5P/TROPOMI Open
Measurements of atmospheric column-averaged dry-air mole fractions of carbon dioxide (XCO2), methane (XCH4), and carbon monoxide (XCO) have been collected across the Pacific Ocean during the Measuring Ocean REferences 2 (MORE-2) campaign i…
View article: Ship-borne measurements of XCO <sub>2</sub> , XCH <sub>4</sub> , and XCO above the Pacific Ocean and comparison to CAMS atmospheric analyses and S5P/TROPOMI
Ship-borne measurements of XCO <sub>2</sub> , XCH <sub>4</sub> , and XCO above the Pacific Ocean and comparison to CAMS atmospheric analyses and S5P/TROPOMI Open
Measurements of atmospheric column-averaged dry-air mole fractions of carbon dioxide (XCO2), methane (XCH4), and carbon monoxide (XCO) have been collected across the Pacific ocean during the Measuring Ocean REferences 2 (MORE-2) campaign i…
View article: Development of a Fast Solar Tracker Enabling Atmospheric Direct Sun Remote Sensing Applications on Different Moving Platforms
Development of a Fast Solar Tracker Enabling Atmospheric Direct Sun Remote Sensing Applications on Different Moving Platforms Open
<p>Spectroscopic direct sun remote sensing of the atmosphere offers an essential tool for the validation of models and satellite observations as well as for the monitoring of emissions. Validation missions for greenhouse gas monitori…
View article: Toward CO2 and CH4 measurements by ground-based observations of surface-scattered sunlight: Instrumentation and experiments
Toward CO2 and CH4 measurements by ground-based observations of surface-scattered sunlight: Instrumentation and experiments Open
<div> <div>Precise knowledge of sources and sinks in the carbon cycle is desired to understand its sensitivity to climate change, and to account and verify man-made emissions. An important role herein play extended sources like…
View article: Mobile ground-based remote sensing of atmospheric CO2, CH4, and CO column densities above the Pacific Ocean
Mobile ground-based remote sensing of atmospheric CO2, CH4, and CO column densities above the Pacific Ocean Open
<p>Validation opportunities for model data and satellite observations in the short-wave infra-red spectral range are still sparse above the oceans. To provide such opportunities, we qualify a Fourier-transform spectrometer (FTS) for …
View article: Column-averaged dry-air mole fractions of CO2, CH4, and CO from direct sunlight measurements above the Pacific during the MORE-2 campaign 2019
Column-averaged dry-air mole fractions of CO2, CH4, and CO from direct sunlight measurements above the Pacific during the MORE-2 campaign 2019 Open
Measurements of atmospheric column-averaged dry-air mole fractions of carbon dioxide (XCO2), methane (XCH4), and carbon monoxide (XCO) have been collected across the Pacific ocean during the Measuring Ocean REferences 2 (MORE-2) campaign i…
View article: The novel HALO mini-DOAS instrument: inferring trace gas concentrations from airborne UV/visible limb spectroscopy under all skies using the scaling method
The novel HALO mini-DOAS instrument: inferring trace gas concentrations from airborne UV/visible limb spectroscopy under all skies using the scaling method Open
We report on a novel six-channel optical spectrometer (further on called mini-DOAS instrument) for airborne nadir and limb measurements of atmospheric trace gases, liquid and solid water, and spectral radiances in the UV/vis and NIR spectr…
View article: Supplementary material to "The novel HALO mini-DOAS instrument: Inferring trace gas concentrations from air-borne UV/visible limb spectroscopy under all skies using the scaling method"
Supplementary material to "The novel HALO mini-DOAS instrument: Inferring trace gas concentrations from air-borne UV/visible limb spectroscopy under all skies using the scaling method" Open
Inferring trace gas concentrations from air-borne UV/visible limb spectroscopy under all skies using the scaling method"
View article: The novel HALO mini-DOAS instrument: Inferring trace gas concentrations from air-borne UV/visible limb spectroscopy under all skies using the scaling method
The novel HALO mini-DOAS instrument: Inferring trace gas concentrations from air-borne UV/visible limb spectroscopy under all skies using the scaling method Open
We report on a novel 6 channel optical spectrometer (further on called mini-DOAS instrument) for aircraftborne nadir and limb measurements of atmospheric trace gases, liquid and solid water, and spectral radiances in the UV/vis and nearIR …