Articles | Volume 17, issue 18
https://doi.org/10.5194/gmd-17-7157-2024
https://doi.org/10.5194/gmd-17-7157-2024
Model description paper
 | 
25 Sep 2024
Model description paper |  | 25 Sep 2024

Methane dynamics in the Baltic Sea: investigating concentration, flux, and isotopic composition patterns using the coupled physical–biogeochemical model BALTSEM-CH4 v1.0

Erik Gustafsson, Bo G. Gustafsson, Martijn Hermans, Christoph Humborg, and Christian Stranne

Related authors

Remineralization rate of terrestrial DOC as inferred from CO2 supersaturated coastal waters
Filippa Fransner, Agneta Fransson, Christoph Humborg, Erik Gustafsson, Letizia Tedesco, Robinson Hordoir, and Jonas Nycander
Biogeosciences, 16, 863–879, https://doi.org/10.5194/bg-16-863-2019,https://doi.org/10.5194/bg-16-863-2019, 2019
Short summary
Sedimentary alkalinity generation and long-term alkalinity development in the Baltic Sea
Erik Gustafsson, Mathilde Hagens, Xiaole Sun, Daniel C. Reed, Christoph Humborg, Caroline P. Slomp, and Bo G. Gustafsson
Biogeosciences, 16, 437–456, https://doi.org/10.5194/bg-16-437-2019,https://doi.org/10.5194/bg-16-437-2019, 2019
Short summary
Carbon cycling on the East Siberian Arctic Shelf – a change in air-sea CO2 flux induced by mineralization of terrestrial organic carbon
Erik Gustafsson, Christoph Humborg, Göran Björk, Christian Stranne, Leif G. Anderson, Marc C. Geibel, Carl-Magnus Mörth, Marcus Sundbom, Igor P. Semiletov, Brett F. Thornton, and Bo G. Gustafsson
Biogeosciences Discuss., https://doi.org/10.5194/bg-2017-115,https://doi.org/10.5194/bg-2017-115, 2017
Preprint withdrawn
Short summary

Related subject area

Climate and Earth system modeling
SASIEv.1: a framework for seasonal and multi-centennial Arctic sea ice emulation
Sian Megan Chilcott, Malte Meinshausen, and Dirk Notz
Geosci. Model Dev., 18, 4965–4982, https://doi.org/10.5194/gmd-18-4965-2025,https://doi.org/10.5194/gmd-18-4965-2025, 2025
Short summary
COSP-RTTOV-1.0: flexible radiation diagnostics to enable new science applications in model evaluation, climate change detection, and satellite mission design
Jonah K. Shaw, Dustin J. Swales, Sergio DeSouza-Machado, David D. Turner, Jennifer E. Kay, and David P. Schneider
Geosci. Model Dev., 18, 4935–4950, https://doi.org/10.5194/gmd-18-4935-2025,https://doi.org/10.5194/gmd-18-4935-2025, 2025
Short summary
Assessing modifications to the Abdul-Razzak and Ghan aerosol activation parameterization (version ARG2000) to improve simulated aerosol–cloud radiative effects in the UK Met Office Unified Model (UM version 13.0)
Pratapaditya Ghosh, Katherine J. Evans, Daniel P. Grosvenor, Hyun-Gyu Kang, Salil Mahajan, Min Xu, Wei Zhang, and Hamish Gordon
Geosci. Model Dev., 18, 4899–4913, https://doi.org/10.5194/gmd-18-4899-2025,https://doi.org/10.5194/gmd-18-4899-2025, 2025
Short summary
Correction of sea surface biases in the NEMO ocean general circulation model using neural networks
Andrea Storto, Sergey Frolov, Laura Slivinski, and Chunxue Yang
Geosci. Model Dev., 18, 4789–4804, https://doi.org/10.5194/gmd-18-4789-2025,https://doi.org/10.5194/gmd-18-4789-2025, 2025
Short summary
Representing lateral groundwater flow from land to river in Earth system models
Chang Liao, L. Ruby Leung, Yilin Fang, Teklu Tesfa, and Robinson Negron-Juarez
Geosci. Model Dev., 18, 4601–4624, https://doi.org/10.5194/gmd-18-4601-2025,https://doi.org/10.5194/gmd-18-4601-2025, 2025
Short summary

Cited articles

Asplund, M. E., Bonaglia, S., Boström, C., Dahl, M., Deyanova, D., Gagnon, K., Gullström, M., Holmer, M., and Björk, M.: Methane Emissions From Nordic Seagrass Meadow Sediments, Front. Mar. Sci., 8, 811533, https://doi.org/10.3389/fmars.2021.811533, 2022. 
Atkins, M. L., Santos, I. R., and Maher, D. T.: Seasonal exports and drivers of dissolved inorganic and organic carbon, carbon dioxide, methane and δ13C signatures in a subtropical river network, Sci. Total Environ., 575, 545–563, https://doi.org/10.1016/j.scitotenv.2016.09.020, 2017. 
Axell, L. B.: On the variability of Baltic Sea deepwater mixing, J. Geophys. Res.-Oceans, 103, 21667–21682, https://doi.org/10.1029/98JC01714, 1998. 
Bange, H. W., Bartell, U. H., Rapsomanikis, S., and Andreae, M. O.: Methane in the Baltic and North Seas and a reassessment of the marine emissions of methane, Global Biogeochem. Cycles, 8, 465–480, https://doi.org/10.1029/94GB02181, 1994. 
Bayer, T. K., Gustafsson, E., Brakebusch, M., and Beer, C.: Future Carbon Emission From Boreal and Permafrost Lakes Are Sensitive to Catchment Organic Carbon Loads, J. Geophys. Res.-Biogeo., 124, 1827–1848, https://doi.org/10.1029/2018JG004978, 2019. 
Download
Short summary
Methane (CH4) cycling in the Baltic Proper is studied through model simulations, enabling a first estimate of key CH4 fluxes. A preliminary budget identifies benthic CH4 release as the dominant source and two main sinks: CH4 oxidation in the water (92 % of sinks) and outgassing to the atmosphere (8 % of sinks). This study addresses CH4 emissions from coastal seas and is a first step toward understanding the relative importance of open-water outgassing compared with local coastal hotspots.
Share