Necki, Jaroslaw: Possible solutions for estimation of the methane emission from coal mine ventilation shafts – source of validation data for IMEO.
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This document discusses potential solutions for estimating methane emissions from coal mine ventilation shafts in Poland. It provides background information on coal mining activity and methane emissions in the Upper Silesia Coal Basin region. Specifically, it details methane concentration and release rate data from 2021 for 13 ventilation shafts operated by JSW coking coal company. The document proposes installing new measurement devices like tunable diode laser spectrometers at the shafts to provide real-time methane measurements with high accuracy over long periods in order to precisely quantify methane emissions from these large point sources. The goal is to estimate emissions with uncertainties better than 0.02 tonnes per hour on a 24-hour basis.
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1) Application of an extended multiple linear regression model to the data detected anthropogenic changes to both dissolved inorganic carbon and carbon isotope ratios, with a rate of increase in anthropogenic carbon of 0.8 μmol/kg/yr and rate of decrease in carbon isotope ratios (Suess effect) of 0.011‰/yr.
2) The rates of change estimated by the regression model were similar to rates estimated from observed regional trends over the study period, suggesting only small impacts from natural variability.
3) A strong linear relationship wasHavu, Minttu: Spatial variability of local carbon emissions and sinks in Hels...
Havu, Minttu: Spatial variability of local carbon emissions and sinks in Hels...Integrated Carbon Observation System (ICOS)
This document summarizes a study estimating the spatial variability of carbon cycle components in Helsinki, Finland using the SUEWS modelling tool. The study found that CO2 emissions from human metabolism accounted for 45% of local anthropogenic emissions, while net biogenic CO2 exchange accounted for 25% of anthropogenic emissions. Spatial maps showed traffic emissions were concentrated along ring roads, building heating emissions in residential areas, and human metabolism emissions in city centers. Vegetation uptake and emissions from human metabolism were comparable to or exceeded emissions from traffic and building heating in some areas of Helsinki.Veerkamp, Hannes: Measurements of the CO2 gas transfer velocity in Jade Bay
Veerkamp, Hannes: Measurements of the CO2 gas transfer velocity in Jade BayIntegrated Carbon Observation System (ICOS)
This study measured CO2 fluxes and water turbulence in Jade Bay, Germany during winter to better understand how these parameters influence air-sea CO2 exchange. Researchers used a floating chamber method and infrared gas analyzer to measure the gas transfer velocity (k) and acoustic instruments to measure turbulent kinetic energy (TKE). Preliminary results found only a weak correlation between wind speed and TKE, and no significant correlation between wind speed and k. Further analysis will test for correlations between k and TKE and compare different instruments' TKE measurements, to improve models of air-sea CO2 flux.Suto, Hiroshi: The Greenhouse gas Observations of Biospheric and Local Emissi...
Suto, Hiroshi: The Greenhouse gas Observations of Biospheric and Local Emissi...Integrated Carbon Observation System (ICOS)
This document discusses the Greenhouse gas Observations of Biospheric and Local Emissions from the Upper sky (GOBLEU) project. The project aims to monitor Japan's climate mitigation progress using high-resolution greenhouse gas measurements from instruments installed on commercial airliners. Initial results show GOBLEU can observe nitric oxide concentrations over cities at finer scales than satellites. Comparisons to ground-based data find GOBLEU measurements correlate well, particularly in the megacity of Nagoya where satellite data correlates less. Future work includes more frequent flights and observations of solar-induced chlorophyll fluorescence over forested areas to monitor carbon sinks.Moonen, Robbert: First results of CO2 and H2O isotope-Flux Measurements in th...
Moonen, Robbert: First results of CO2 and H2O isotope-Flux Measurements in th...Integrated Carbon Observation System (ICOS)
This document summarizes research measuring stable isotopologues of water and carbon dioxide in the Amazon rainforest to better understand land-atmosphere exchange processes. Laser spectrometry was used to measure isotopic composition and fluxes at high temporal resolution. Preliminary results showed daytime CO2 uptake enriching ambient air in carbon-13, and water vapor fluxes originating from evaporated, fractionated sources similar to root water. Further analysis will include laboratory analysis of leaf, soil, and air samples to partition fluxes, as well as isotope modeling to integrate effects and fluxes. The goal is to describe turbulent exchange processes at small scales to improve understanding of this complex system.Mikaloff-Fletcher, Sara: MethaneSAT: Towards detecting agricultural emissions...
Mikaloff-Fletcher, Sara: MethaneSAT: Towards detecting agricultural emissions...Integrated Carbon Observation System (ICOS)
MethaneSAT is a new satellite funded by donations that aims to measure methane emissions globally to help reduce them. Its high resolution could allow detecting diffuse agricultural emissions for the first time from space. New Zealand's researchers will help develop methods to measure agricultural methane using MethaneSAT data. They will test these methods with measurement campaigns in New Zealand, where agriculture is a major source of methane emissions. The goal is to then apply this capability to measure methane from livestock and rice farming globally.Leggett, Graham: LI-COR Trace Gas Analyzers - Applications for Measurements o...
Leggett, Graham: LI-COR Trace Gas Analyzers - Applications for Measurements o...Integrated Carbon Observation System (ICOS)
The document discusses LI-COR's trace gas analyzer platform and its applications. The platform uses optical feedback cavity enhanced absorption spectroscopy and can measure methane, carbon dioxide, and nitrous oxide. It is designed for flexibility in field research. Applications discussed include measuring soil gas fluxes, long-term atmospheric monitoring, urban and mobile emission monitoring, measuring pCO2 in seawater, and profiling gas storage fluxes.Kikaj, Dafina: Importance of harmonizing radon datasets for reducing uncertai...
Kikaj, Dafina: Importance of harmonizing radon datasets for reducing uncertai...Integrated Carbon Observation System (ICOS)
Radon is a useful tracer gas for estimating greenhouse gas emissions and reducing uncertainties in atmospheric transport models. However, current radon measurement techniques have inconsistencies that limit their usefulness. This study proposes a standardized protocol for radon data processing to harmonize measurements across sites and over time. Applying time response corrections to radon detector outputs from two UK sites improved correlations with methane concentrations and allowed more frequent flux estimations in atmospheric transport models. The standardized protocol has potential to better utilize radon measurements for quantifying greenhouse gas emissions.Grünwald, Thomas: Windthrow turns a former old spruce forest into a net CO2 s...
Grünwald, Thomas: Windthrow turns a former old spruce forest into a net CO2 s...Integrated Carbon Observation System (ICOS)
A large windthrow event in 2007 turned a former old spruce forest (DE-Hzd) into a net CO2 source for 11 years until 2017. Compared to an undisturbed old spruce forest (DE-Tha), the disturbed forest was a weaker carbon sink from 2018-2021, absorbing only 21% as much carbon. In total, the windthrow caused the disturbed forest to lose an estimated 288 tons of carbon per hectare from 2010-2021. Parallel monitoring revealed both the duration and magnitude of carbon loss following the disturbance.Davis, Kenneth: Applications of eddy covariance flux measurements in quantify...
Davis, Kenneth: Applications of eddy covariance flux measurements in quantify...Integrated Carbon Observation System (ICOS)
This document summarizes research using eddy covariance flux tower measurements to quantify greenhouse gas (GHG) emissions from cities. Flux towers can directly measure CO2 and other gas fluxes continuously over urban areas. When combined with trace gas measurements and footprint modeling, flux data can be decomposed to separate biological from fossil-fuel derived CO2 fluxes. Comparisons of decomposed flux data to high-resolution urban GHG emissions inventories like Hestia show good agreement, validating the inventories. Flux towers also reveal active photosynthesis in urban turf grasses, highlighting needs to represent different urban vegetation types. Accounting for variations in rural biogenic fluxes is also important for isolating urban anthropogenic emissions.Agusti-Panareda, Anna: The CoCO2 global nature run as an evaluation tool of t...
Agusti-Panareda, Anna: The CoCO2 global nature run as an evaluation tool of t...Integrated Carbon Observation System (ICOS)
The CoCO2 project aims to develop prototype systems for monitoring and verifying European anthropogenic CO2 emissions using the CO2M model implemented within Copernicus. The Integrated Forecasting System global prototype uses optimized surface fluxes and uncertainties from observations like TROPOMI against prior information from a forward model. Updates to model components like using CB05-BASCOE for the CH4 chemical sink and CMEMS ocean fluxes improve fits to observations. However, errors in land auxiliary data like leaf area index remain a key source of uncertainty in the CO2 sink that the IFS inversion is working to correct.Turnbull, Jocelyn: Towards an International standard for Urban Greenhouse Gas...
Turnbull, Jocelyn: Towards an International standard for Urban Greenhouse Gas...Integrated Carbon Observation System (ICOS)
The document provides guidelines for greenhouse gas emission observation and monitoring research practices in urban areas. It aims to lay out available methodologies, allow stakeholders to assess quality, and provide clear guidelines for evaluating research plans and outcomes. The guidelines represent the first step toward establishing standards for atmospheric greenhouse gas research to support emission inventories and mitigation actions. The report content includes discussions of urban inventory and flux models, direct observational methods, and data assimilation systems used in existing research.Rijsdijk, Pieter: The impact of the COVID-19 lockdown on CO2 and NO2 concentr...
Rijsdijk, Pieter: The impact of the COVID-19 lockdown on CO2 and NO2 concentr...Integrated Carbon Observation System (ICOS)
This document presents a study analyzing the impact of the COVID-19 lockdown on concentrations of CO2, CO and NO2 in Rotterdam using observational data and machine learning models. The main findings are:
- NO2 levels decreased significantly (25% on average) due to reduced traffic and industrial emissions during lockdown.
- CO2 levels showed some decrease in urban areas (31% reduction) but not in rural areas.
- CO levels did not show a clear reduction associated with lockdown measures.
- The results indicate lockdowns can effectively reduce NO2 pollution but their impact on CO2 and CO is more nuanced.More from Integrated Carbon Observation System (ICOS) (20)
Dukat, Paulina: How does drought impact water and carbon exchange in the temp...
Dukat, Paulina: How does drought impact water and carbon exchange in the temp...
van Zwieten, Ruthger: Performance assessment of the mobile g4301 Cavity Ring-...
van Zwieten, Ruthger: Performance assessment of the mobile g4301 Cavity Ring-...
Vainio, Elisa: Carbon Action – Towards regenerative agriculture in Finland
Vainio, Elisa: Carbon Action – Towards regenerative agriculture in Finland
McKinley, Galen: Physical knowledge to improve and extend machine learning pC...
McKinley, Galen: Physical knowledge to improve and extend machine learning pC...
Kowalska, Natalia: Does Below-Above Canopy Air Mass Decoupling Impact Tempera...
Kowalska, Natalia: Does Below-Above Canopy Air Mass Decoupling Impact Tempera...
Cinelli, Giorgia: Use of outdoor radon activity concentration and radon flux ...
Cinelli, Giorgia: Use of outdoor radon activity concentration and radon flux ...
McKain, Kathryn: One year of aircraft vertical profile measurements of CO2, C...
McKain, Kathryn: One year of aircraft vertical profile measurements of CO2, C...
Leseurre, Coraline: Investigation of the Suess Effect in the Southern Indian ...
Leseurre, Coraline: Investigation of the Suess Effect in the Southern Indian ...
Havu, Minttu: Spatial variability of local carbon emissions and sinks in Hels...
Havu, Minttu: Spatial variability of local carbon emissions and sinks in Hels...
Veerkamp, Hannes: Measurements of the CO2 gas transfer velocity in Jade Bay
Veerkamp, Hannes: Measurements of the CO2 gas transfer velocity in Jade Bay
Suto, Hiroshi: The Greenhouse gas Observations of Biospheric and Local Emissi...
Suto, Hiroshi: The Greenhouse gas Observations of Biospheric and Local Emissi...
Moonen, Robbert: First results of CO2 and H2O isotope-Flux Measurements in th...
Moonen, Robbert: First results of CO2 and H2O isotope-Flux Measurements in th...
Mikaloff-Fletcher, Sara: MethaneSAT: Towards detecting agricultural emissions...
Mikaloff-Fletcher, Sara: MethaneSAT: Towards detecting agricultural emissions...
Leggett, Graham: LI-COR Trace Gas Analyzers - Applications for Measurements o...
Leggett, Graham: LI-COR Trace Gas Analyzers - Applications for Measurements o...
Kikaj, Dafina: Importance of harmonizing radon datasets for reducing uncertai...
Kikaj, Dafina: Importance of harmonizing radon datasets for reducing uncertai...
Grünwald, Thomas: Windthrow turns a former old spruce forest into a net CO2 s...
Grünwald, Thomas: Windthrow turns a former old spruce forest into a net CO2 s...
Davis, Kenneth: Applications of eddy covariance flux measurements in quantify...
Davis, Kenneth: Applications of eddy covariance flux measurements in quantify...
Agusti-Panareda, Anna: The CoCO2 global nature run as an evaluation tool of t...
Agusti-Panareda, Anna: The CoCO2 global nature run as an evaluation tool of t...
Turnbull, Jocelyn: Towards an International standard for Urban Greenhouse Gas...
Turnbull, Jocelyn: Towards an International standard for Urban Greenhouse Gas...
Rijsdijk, Pieter: The impact of the COVID-19 lockdown on CO2 and NO2 concentr...
Rijsdijk, Pieter: The impact of the COVID-19 lockdown on CO2 and NO2 concentr...
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Mapping the Growth of Supermassive Black Holes as a Function of Galaxy Stella...
The growth of supermassive black holes is strongly linked to their galaxies. It has been shown that the population
mean black hole accretion rate (BHAR) primarily correlates with the galaxy stellar mass (Må) and redshift for the
general galaxy population. This work aims to provide the best measurements of BHAR as a function of Må and
redshift over ranges of 109.5 < Må < 1012 Me and z < 4. We compile an unprecedentedly large sample with 8000
active galactic nuclei (AGNs) and 1.3 million normal galaxies from nine high-quality survey fields following a
wedding cake design. We further develop a semiparametric Bayesian method that can reasonably estimate BHAR
and the corresponding uncertainties, even for sparsely populated regions in the parameter space. BHAR is
constrained by X-ray surveys sampling the AGN accretion power and UV-to-infrared multiwavelength surveys
sampling the galaxy population. Our results can independently predict the X-ray luminosity function (XLF) from
the galaxy stellar mass function (SMF), and the prediction is consistent with the observed XLF. We also try adding
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Compositions of iron-meteorite parent bodies constrainthe structure of the pr...
Magmatic iron-meteorite parent bodies are the earliest planetesimals in the Solar System,and they preserve information about conditions and planet-forming processes in thesolar nebula. In this study, we include comprehensive elemental compositions andfractional-crystallization modeling for iron meteorites from the cores of five differenti-ated asteroids from the inner Solar System. Together with previous results of metalliccores from the outer Solar System, we conclude that asteroidal cores from the outerSolar System have smaller sizes, elevated siderophile-element abundances, and simplercrystallization processes than those from the inner Solar System. These differences arerelated to the formation locations of the parent asteroids because the solar protoplane-tary disk varied in redox conditions, elemental distributions, and dynamics at differentheliocentric distances. Using highly siderophile-element data from iron meteorites, wereconstruct the distribution of calcium-aluminum-rich inclusions (CAIs) across theprotoplanetary disk within the first million years of Solar-System history. CAIs, the firstsolids to condense in the Solar System, formed close to the Sun. They were, however,concentrated within the outer disk and depleted within the inner disk. Future modelsof the structure and evolution of the protoplanetary disk should account for this dis-tribution pattern of CAIs.
Embracing Deep Variability For Reproducibility and Replicability
Embracing Deep Variability For Reproducibility and ReplicabilityUniversity of Rennes, INSA Rennes, Inria/IRISA, CNRS
Embracing Deep Variability For Reproducibility and Replicability
Abstract: Reproducibility (aka determinism in some cases) constitutes a fundamental aspect in various fields of computer science, such as floating-point computations in numerical analysis and simulation, concurrency models in parallelism, reproducible builds for third parties integration and packaging, and containerization for execution environments. These concepts, while pervasive across diverse concerns, often exhibit intricate inter-dependencies, making it challenging to achieve a comprehensive understanding. In this short and vision paper we delve into the application of software engineering techniques, specifically variability management, to systematically identify and explicit points of variability that may give rise to reproducibility issues (eg language, libraries, compiler, virtual machine, OS, environment variables, etc). The primary objectives are: i) gaining insights into the variability layers and their possible interactions, ii) capturing and documenting configurations for the sake of reproducibility, and iii) exploring diverse configurations to replicate, and hence validate and ensure the robustness of results. By adopting these methodologies, we aim to address the complexities associated with reproducibility and replicability in modern software systems and environments, facilitating a more comprehensive and nuanced perspective on these critical aspects.
https://hal.science/hal-04582287
Explainable Deepfake Image/Video Detection
Presentation of our paper, "Towards Quantitative Evaluation of Explainable AI Methods for Deepfake Detection", by K. Tsigos, E. Apostolidis, S. Baxevanakis, S. Papadopoulos, V. Mezaris. Presented at the ACM Int. Workshop on Multimedia AI against Disinformation (MAD’24) of the ACM Int. Conf. on Multimedia Retrieval (ICMR’24), Thailand, June 2024. https://doi.org/10.1145/3643491.3660292 https://arxiv.org/abs/2404.18649
Software available at https://github.com/IDT-ITI/XAI-Deepfakes
Rodents, Birds and locust_Pests of crops.pdf
Mole rat or Lesser bandicoot rat, Bandicotabengalensis
•Head -round and broad muzzle
•Tail -shorter than head, body
•Prefers damp areas
•Burrows with scooped soil before entrance
•Potential rat, one pair can produce more than 800 offspringsin one year
一比一原版美国佩斯大学毕业证如何办理
原版一模一样【微信：741003700 】【美国佩斯大学毕业证成绩单】【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
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Gadgets for management of stored product pests_Dr.UPR.pdf
Insectsplayamajorroleinthedeteriorationoffoodgrainscausingbothquantitativeandqualitativelosses
Wellprovedthatnogranariescanbefilledwithgrainswithoutinsectsastheharvestedproducecontainegg(or)larvae(or)pupae(or)adultinsectinthembecauseoffieldcarryoverinfestationwhichcannotbeavoidedindevelopingcountrieslikeIndia
Simpletechnologiesfortimelydetectionofinsectsinthestoredproduceandtherebyplantimelycontrolmeasures
SDSS1335+0728: The awakening of a ∼ 106M⊙ black hole⋆
Context. The early-type galaxy SDSS J133519.91+072807.4 (hereafter SDSS1335+0728), which had exhibited no prior optical variations during the preceding two decades, began showing significant nuclear variability in the Zwicky Transient Facility (ZTF) alert stream from December 2019 (as ZTF19acnskyy). This variability behaviour, coupled with the host-galaxy properties, suggests that SDSS1335+0728 hosts a ∼ 106M⊙ black hole (BH) that is currently in the process of ‘turning on’. Aims. We present a multi-wavelength photometric analysis and spectroscopic follow-up performed with the aim of better understanding the origin of the nuclear variations detected in SDSS1335+0728. Methods. We used archival photometry (from WISE, 2MASS, SDSS, GALEX, eROSITA) and spectroscopic data (from SDSS and LAMOST) to study the state of SDSS1335+0728 prior to December 2019, and new observations from Swift, SOAR/Goodman, VLT/X-shooter, and Keck/LRIS taken after its turn-on to characterise its current state. We analysed the variability of SDSS1335+0728 in the X-ray/UV/optical/mid-infrared range, modelled its spectral energy distribution prior to and after December 2019, and studied the evolution of its UV/optical spectra. Results. From our multi-wavelength photometric analysis, we find that: (a) since 2021, the UV flux (from Swift/UVOT observations) is four times brighter than the flux reported by GALEX in 2004; (b) since June 2022, the mid-infrared flux has risen more than two times, and the W1−W2 WISE colour has become redder; and (c) since February 2024, the source has begun showing X-ray emission. From our spectroscopic follow-up, we see that (i) the narrow emission line ratios are now consistent with a more energetic ionising continuum; (ii) broad emission lines are not detected; and (iii) the [OIII] line increased its flux ∼ 3.6 years after the first ZTF alert, which implies a relatively compact narrow-line-emitting region. Conclusions. We conclude that the variations observed in SDSS1335+0728 could be either explained by a ∼ 106M⊙ AGN that is just turning on or by an exotic tidal disruption event (TDE). If the former is true, SDSS1335+0728 is one of the strongest cases of an AGNobserved in the process of activating. If the latter were found to be the case, it would correspond to the longest and faintest TDE ever observed (or another class of still unknown nuclear transient). Future observations of SDSS1335+0728 are crucial to further understand its behaviour. Key words. galaxies: active– accretion, accretion discs– galaxies: individual: SDSS J133519.91+072807.4
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Holsinger, Bruce W. - Music, body and desire in medieval culture [2001].pdf
Music and Medieval History
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Sexuality - Issues, Attitude and Behaviour - Applied Social Psychology - Psyc...
A proprietary approach developed by bringing together the best of learning theories from Psychology, design principles from the world of visualization, and pedagogical methods from over a decade of training experience, that enables you to: Learn better, faster!
Candidate young stellar objects in the S-cluster: Kinematic analysis of a sub...
Context. The observation of several L-band emission sources in the S cluster has led to a rich discussion of their nature. However, a definitive answer to the classification of the dusty objects requires an explanation for the detection of compact Doppler-shifted Brγ emission. The ionized hydrogen in combination with the observation of mid-infrared L-band continuum emission suggests that most of these sources are embedded in a dusty envelope. These embedded sources are part of the S-cluster, and their relationship to the S-stars is still under debate. To date, the question of the origin of these two populations has been vague, although all explanations favor migration processes for the individual cluster members. Aims. This work revisits the S-cluster and its dusty members orbiting the supermassive black hole SgrA* on bound Keplerian orbits from a kinematic perspective. The aim is to explore the Keplerian parameters for patterns that might imply a nonrandom distribution of the sample. Additionally, various analytical aspects are considered to address the nature of the dusty sources. Methods. Based on the photometric analysis, we estimated the individual H−K and K−L colors for the source sample and compared the results to known cluster members. The classification revealed a noticeable contrast between the S-stars and the dusty sources. To fit the flux-density distribution, we utilized the radiative transfer code HYPERION and implemented a young stellar object Class I model. We obtained the position angle from the Keplerian fit results; additionally, we analyzed the distribution of the inclinations and the longitudes of the ascending node. Results. The colors of the dusty sources suggest a stellar nature consistent with the spectral energy distribution in the near and midinfrared domains. Furthermore, the evaporation timescales of dusty and gaseous clumps in the vicinity of SgrA* are much shorter ( 2yr) than the epochs covered by the observations (≈15yr). In addition to the strong evidence for the stellar classification of the D-sources, we also find a clear disk-like pattern following the arrangements of S-stars proposed in the literature. Furthermore, we find a global intrinsic inclination for all dusty sources of 60 ± 20◦, implying a common formation process. Conclusions. The pattern of the dusty sources manifested in the distribution of the position angles, inclinations, and longitudes of the ascending node strongly suggests two different scenarios: the main-sequence stars and the dusty stellar S-cluster sources share a common formation history or migrated with a similar formation channel in the vicinity of SgrA*. Alternatively, the gravitational influence of SgrA* in combination with a massive perturber, such as a putative intermediate mass black hole in the IRS 13 cluster, forces the dusty objects and S-stars to follow a particular orbital arrangement. Key words. stars: black holes– stars: formation– Galaxy: center– galaxies: star formation
Evaluation and Identification of J'BaFofi the Giant Spider of Congo and Moke...
ABSTRACT
The J'BaFofi, or "Giant Spider," is a mainly legendary arachnid by reportedly inhabiting the dense rain forests of
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My study aims to proper evaluate the existence of the J'BaFofi through the analysis of historical reports,indigenous
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Hariyalikart Case Study of helping farmers in Bihar
Helping farmers all across India through our latest technologies of modern farming like drones for irrigation and best pest control For more visit : https://www.hariyalikart.com/case-study
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Embracing Deep Variability For Reproducibility and Replicability
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Necki, Jaroslaw: Possible solutions for estimation of the methane emission from coal mine ventilation shafts – source of validation data for IMEO.
- 1. Possible solutions for estimation of the methane emission from coal mine ventilation shafts – source of validation data for IMEO Jarek Necki Faculty of Physics and Applied Computer Science AGH – University of Science and Technology ICOS Science Conference Utrecht 15.09.2022 www.agh.edu.pl
- 2. USCB – Upper Silesia Coal Basin Area ~ 1100km2 Overall emission~500kt/y ~50 exhaust shafts (VAM) Single strongest CH4 source ~ 25-30kt/y
- 3. Mining activity at USCB – all shafts
- 4. JSW coking coal ventilation shafts 6 coal mines 13 VAM shafts
- 5. Exhaust ventilation shafts - VAM Air flow 130 – 500 m3/s CH4 concentration 0.01% - 0.4%
- 6. VAM release rates - JSW coking coal company 2021 Flow Conc Release Coal mine Shaft m3/min % kt/y t/h Borynia III 25000 0.06% 6 0.6 VI 12000 0.23% 10 1.2 Budryk III 20000 0.29% 22 2.5 VI 15000 0.25% 14 1.6 Knurów A 8000 0.08% 2 0.3 VI 12000 0.02% 1 0.1 Pniowek III 20000 0.12% 9 1.0 IV 11000 0.34% 14 1.6 VI 15000 0.32% 18 2.1 Szczygłowice IV 14000 0.31% 16 1.9 VI 20000 0.36% 27 3.1 Zofiowka IV 12000 0.08% 4 0.4 VI 30000 0.11% 12 1.4 JSW VAM release -155kt/y from 13 point sources spread over 2 x 200km2
- 7. USCB CH4 emissions - recent literature
- 8. IMEO/CCAC TD BU study locations
- 9. Methane 2 Go project (UNEP/DLR - ?AGH) AGH Tasks: 1) Mobile CH4 measurements at ground level 2) Direct CH4 measurements - over shafts - in shafts - in galleries 3) Flow rate measurements
- 10. Why do we need to instal new devices?
- 11. TROPOMI/GHGSat
- 12. XCH4 range
- 13. Blind test (incidental release from truck):
- 14. Our goal: precise large relese, precisely localized • W will provide, for possible long period, real time results of measurement done with TDLS directly over the shafts and inside the shafts with accuracy 20ppb • • and flowrate estimates with accuracy of 100m3/min 24h/day release with uncertainty better than 0.02 t/h
- 15. Thank You • Hopefully, service will be finishedd before 2040