A5021867548- Atmospheric and Environmental Gas Dynamics
- Spectroscopy and Laser Applications
- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Air Quality Monitoring and Forecasting
- Coal Properties and Utilization
- Wind and Air Flow Studies
- Odor and Emission Control Technologies
- Meteorological Phenomena and Simulations
- Methane Hydrates and Related Phenomena
- Air Quality and Health Impacts
- Mining Techniques and Economics
- Landfill Environmental Impact Studies
- Vehicle emissions and performance
University of Bremen
2016-2025
Staats- und Universitätsbibliothek Bremen
2025
Significance Fugitive methane emissions are thought to often exhibit a heavy-tail distribution (more high-emission sources than expected in normal distribution), and thus efficient mitigation is possible if we locate the strongest emitters. Here demonstrate airborne remote measurements of plumes at 1- 3-m ground resolution over Four Corners region. We identified more 250 point sources, whose followed lognormal distribution, characteristic. The top 10% emitters explain about half total...
Abstract. At local scales, emissions of methane and carbon dioxide are highly uncertain. Localized sources both trace gases can create strong gradients in its columnar abundance, which be discerned using absorption spectroscopy at high spatial resolution. In a previous study, more than 250 plumes were observed the San Juan Basin near Four Corners during April 2015 next-generation Airborne Visible/Infrared Imaging Spectrometer (AVIRIS-NG) linearized matched filter. For first time, we apply...
Abstract. Methane (CH4) is the second most important anthropogenic greenhouse gas, whose atmospheric concentration modulated by human-induced activities, and it has a larger global warming potential than carbon dioxide (CO2). Because of its short lifetime relative to that CO2, reduction abundance CH4 an attractive target for short-term climate mitigation strategies. However, reducing requires emissions and, therefore, knowledge sources. For this reason, CO2 (CoMet) campaign in May June 2018...
Abstract. Since 2009, the Greenhouse gases Observing SATellite (GOSAT) has performed radiance measurements in near-infrared (NIR) and shortwave infrared (SWIR) spectral region. From February 2019 onward, data from GOSAT-2 have also been available. We present first results application of Fast atmOspheric traCe gAs retrievaL (FOCAL) algorithm to derive column-averaged dry-air mole fractions carbon dioxide (XCO2) GOSAT radiances their validation. FOCAL was initially developed for OCO-2 XCO2...
Abstract. We show new results from an updated version of the Fast atmOspheric traCe gAs retrievaL (FOCAL) retrieval method applied to measurements Greenhouse gases Observing SATellite (GOSAT) and its successor GOSAT-2. FOCAL was originally developed for estimating total column carbon dioxide mixing ratio (XCO2) spectral made by Orbiting Carbon Observatory-2 (OCO-2). However, depending on available windows, also successfully retrieves amounts other atmospheric species their uncertainties...
Abstract. Power plants and large industrial facilities contribute more than half of global anthropogenic CO2 emissions. Quantifying the emissions these point sources is therefore one main goals planned constellation monitoring satellites (CO2M) European Copernicus program. Atmospheric transport models may be used to study capabilities such through observing system simulation experiments quantify in an inverse modeling framework. How realistically plumes power can simulated how strongly...
Abstract. Fugitive emissions from waste disposal sites are important anthropogenic sources of the greenhouse gas methane (CH4). As a result growing world population and recognition need to control emissions, this source CH4 has received much recent attention. However, accurate assessment landfills by modeling existing measurement techniques is challenging. This because inaccurate knowledge model parameters extent limited accessibility landfill sites. results in large uncertainty our...
Abstract. Methane is the second most important anthropogenic greenhouse gas in Earth's atmosphere. To effectively reduce these emissions, a good knowledge of source locations and strengths required. Airborne remote sensing instruments such as Visible InfraRed Imaging Spectrometer – Next Generation (AVIRIS-NG) with meter-scale imaging capabilities are able to yield information about magnitudes methane sources. In this study, we successfully applied weighting function modified differential...
Abstract. A reduction of the anthropogenic emissions CO2 (carbon dioxide) is necessary to stop or slow down man-made climate change. To verify mitigation strategies, a global monitoring system such as envisaged European Copernicus mission (CO2M) required. Those satellite data are going be complemented and validated with airborne measurements. Unmanned aerial vehicle (UAV)-based measurements can provide cost-effective way contribute these activities. Here, we present development an sUAS...
In 2022, Australia produced over 450 million tonnes of coal, accounting for approximately 7% global production. About 75% this output came from coal mines located in the Bowen Basin (Queensland) and Hunter Coalfields (New South Wales). According to Australia’s 2022 UNFCCC submissions, open-cut underground mining contributes around one-fifth nation’s methane emissions, positioning it as a key focus mitigation efforts. These emissions are calculated using combination IPCC...
Spectrally high-resolution passive remote sensing imaging spectrometers are becoming increasingly important for reliable quantification of anthropogenic greenhouse gas (GHG) emissions from a wide variety carbon dioxide (CO2) and methane (CH4) sources. These nadir-looking air- or spaceborne instruments collect backscattered solar radiation the Earth's surface, which 2D atmospheric concentration maps CO2 CH4 retrieved. Using, example, mass balance approaches, emission rates can be derived...
Methane (CH4) is the second most important greenhouse gas (GHG) whose atmospheric abundance modified by anthropogenic activity. The reduction of CH4 emissions has been identified as an essential mitigation target for slowing man-made climate change. According to inventories, coal mining accounts roughly 33% fossil fuel and 11% all emissions. Accurate identification mining-related sources quantification their annual emission rate needed corporate reporting requirements, national inventory...
Abstract. Methane (CH4), alongside carbon dioxide (CO2), is a key driver of anthropogenic climate change. Reducing CH4 crucial for short-term mitigation. Waste-related activities, such as landfills, are major source, even in developed countries. Atmospheric concentration measurements using remote sensing offer powerful way to quantify these emissions. We study waste facilities near Madrid, Spain, where satellite data indicated high For the first time, we combine passive imaging (MAMAP2DL)...
Abstract. Fugitive emissions from waste disposal sites are important anthropogenic sources of the greenhouse gas methane (CH4). As a result growing world population and recognition need to control emissions, this source CH4 has received much recent attention. However, accurate assessment landfills by modeling existing measurement techniques is challenging. This because inaccurate knowledge model parameters extent limited accessibility landfill sites. results in large uncertainty our...
The CoMet 2.0 Arctic airborne measurement campaign of 2022 targeted a variety natural as well anthropogenic sources CH4, mostly in Canada, such landfills, coal mines, power plants or fossil fuel exploitation sites. Many emission targets consist few strong emitters with small negligible spatial extension. In these cases, plumes can readily be observed by passive imaging spectrometers, through the enhancement column averaged CH4. However, over oil and gas fields Lloydminster area at...
Methane (CH4) is the second most important anthropogenic greenhouse gas (GHG), and its emissions reduction has been identified as an essential mitigation target to slow down climate change. According inventories, fossil fuel production usage account for roughly 17% of global CH4  emissions, which approximately 33% originate from coal mining. Accurate identification mining-related CH4 sources quantification their annual emission rate needed corporate reporting requirements, national...
To reduce and mitigate anthropogenic greenhouse gas surface fluxes from industrial sites, their sources must be, firstly, identified or localized and, secondly, accurately quantified. For methane (CH4), the second most important gas, quantification of its diverse emitters is still a challenge. Due to nature, these can reach dimensions point hundreds square kilometres for fossil fuel (gas, oil, coal) exploitation sites up several in case waste disposal sites. Although, CH4 emissions from,...
Abstract. A reduction of the anthropogenic emissions CO2 (carbon dioxide) is necessary to stop or slow down man-made climate change. To verify mitigation strategies, a global monitoring system such as envisaged European Copernicus mission (CO2M) required. Those satellite data are going be complemented and validated with airborne measurements. UAV (unmanned aerial vehicle) based measurements can provide cost-effective way contribute this activities. Here we present development sUAS (small...
Abstract. Since 2009, the Greenhouse gases Observing SATellite (GOSAT) performs radiance measurements in shortwave-infrared (SWIR) spectral region. From February 2019 onward, data from GOSAT-2 are also available. We present first results application of Fast atmOspheric traCe gAs retrieval (FOCAL) algorithm to derive column-averaged dry-air mole fractions carbon dioxide (XCO2) GOSAT and radiances their validation. FOCAL has initially been developed for OCO-2 XCO2 retrievals allows...
Abstract. Methane (CH4) is the second most important anthropogenic greenhouse gas, whose atmospheric concentration modulated by human-induced activities, and it has a larger global warming potential than carbon dioxide (CO2). Because of its short lifetime relative to that CO2, reduction abundance CH4 an attractive target for term climate mitigation strategies. However, reducing requires emissions and, therefore, knowledge sources essential. For this reason, CO2 (CoMet) campaign in early...
Anthropogenic greenhouse gas (GHG) emissions remain the main concern for global climate change. To reduce and mitigate those both anthropogenic natural sources must be identified quantified. However, high northern latitude wetland regions may also overlap with, e.g., fossil fuel extraction sites. Consequently, commonly used passive satellite sensors are often challenged to observe disentangle due challenging illumination conditions their large ground scene size, respectively.To investigate...
Remote sensing measurements of greenhouse gases from aircraft to detect and quantify gas emissions began about 15 years ago. These have been exploited predominantly anthropogenic emissions. However, with new satellite systems targeting especially methane (CH4) on different scales, high-precision airborne are needed validate these too small be detected space-based sensors.For this, the MAMAP2D family passive imaging remote instruments has is being built at Institute Environmental Physics...