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Estimating Upper Silesian coal mine methane emissions from airborne in situ observations and dispersion modeling

Kostinek, Julian and Roiger, Anke and Eckl, Maximilian and Fiehn, Alina and Luther, Andreas and Wildmann, Norman and Klausner, Theresa and Fix, Andreas and Knote, Christoph and Stohl, Andreas and Butz, André (2021) Estimating Upper Silesian coal mine methane emissions from airborne in situ observations and dispersion modeling. Atmospheric Chemistry and Physics (ACP), 21 (11), pp. 8791-8807. Copernicus Publications. doi: 10.5194/acp-21-8791-2021. ISSN 1680-7316.

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Official URL: https://acp.copernicus.org/articles/21/8791/2021/


Abundant mining and industrial activities located in the Upper Silesian Coal Basin (USCB) lead to large emissions of the potent greenhouse gas (GHG) methane (CH4). The strong localization of CH4 emitters (mostly confined to known coal mine ventilation shafts) and the large emissions of 448 and 720 kt CH4 yr−1 reported in the European Pollutant Release and Transfer Register (E-PRTR 2017) and the Emissions Database for Global Atmospheric Research (EDGAR v4.3.2), respectively, make the USCB a prime research target for validating and improving CH4 flux estimation techniques. High-precision observations of this GHG were made downwind of local (e.g., single facilities) to regional-scale (e.g., agglomerations) sources in the context of the CoMet 1.0 campaign in early summer 2018. A quantum cascade–interband cascade laser (QCL–ICL)-based spectrometer adapted for airborne research was deployed aboard the German Aerospace Center (DLR) Cessna 208B to sample the planetary boundary layer (PBL) in situ. Regional CH4 emission estimates for the USCB are derived using a model approach including assimilated wind soundings from three ground-based Doppler lidars. Although retrieving estimates for individual emitters is difficult using only single flights due to sparse data availability, the combination of two flights allows for exploiting different meteorological conditions (analogous to a sparse tomography algorithm) to establish confidence on facility-level estimates. Emission rates from individual sources not only are needed for unambiguous comparisons between bottom-up and top-down inventories but also become indispensable if (independently verifiable) sanctions are to be imposed on individual companies emitting GHGs. An uncertainty analysis is presented for both the regional-scale and facility-level emission estimates. We find instantaneous coal mine emission estimates of 451/423 ± 77/79 kt CH4 yr−1 for the morning/afternoon flight of 6 June 2018. The derived fuel-exploitation emission rates coincide (±6 %) with annual-average inventorial data from E-PRTR 2017 although they are distinctly lower (−28 %/−32 %) than values reported in EDGAR v4.3.2. Discrepancies in available emission inventories could potentially be narrowed down with sufficient observations using the method described herein to bridge the gap between instantaneous emission estimates and yearly averaged inventories.

Item URL in elib:https://elib.dlr.de/145574/
Document Type:Article
Title:Estimating Upper Silesian coal mine methane emissions from airborne in situ observations and dispersion modeling
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Eckl, MaximilianDLR, IPAhttps://orcid.org/0000-0001-5876-7392UNSPECIFIED
Fiehn, AlinaDLR, IPAhttps://orcid.org/0000-0003-3376-4405UNSPECIFIED
Wildmann, NormanDLR, IPAhttps://orcid.org/0000-0001-9475-4206UNSPECIFIED
Klausner, TheresaDLR, IPAhttps://orcid.org/0000-0002-1792-6649UNSPECIFIED
Fix, AndreasDLR, IPAhttps://orcid.org/0000-0003-2818-9290UNSPECIFIED
Knote, ChristophMeteorological Institute, Ludwig-Maximilians-Universität, Munich, Germanyhttps://orcid.org/0000-0001-9105-9179UNSPECIFIED
Stohl, AndreasDepartment of Meteorology and Geophysics, University of Vienna, Vienna, AustriaUNSPECIFIEDUNSPECIFIED
Butz, AndréUniv. Heidelberghttps://orcid.org/0000-0003-0593-1608UNSPECIFIED
Date:10 June 2021
Journal or Publication Title:Atmospheric Chemistry and Physics (ACP)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 8791-8807
Publisher:Copernicus Publications
Keywords:USCB, in situ, methane, emissions, airborne, dispersion modeling
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Atmospheric and climate research
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Institute of Atmospheric Physics > Transport Meteorology
Institute of Atmospheric Physics > Lidar
Deposited By: Kostinek, Julian
Deposited On:15 Nov 2021 08:22
Last Modified:19 Nov 2021 10:42

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