Articles | Volume 4-osr8
https://doi.org/10.5194/sp-4-osr8-7-2024
https://doi.org/10.5194/sp-4-osr8-7-2024
30 Sep 2024
 | OSR8 | Chapter 2.5
 | 30 Sep 2024 | OSR8 | Chapter 2.5

Characteristics and trends of marine heatwaves in the northwest European Shelf and the impacts on density stratification

Wei Chen and Joanna Staneva

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The role of heat wave events in the occurrence and persistence of thermal stratification in the southern North Sea
Wei Chen, Joanna Staneva, Sebastian Grayek, Johannes Schulz-Stellenfleth, and Jens Greinert
Nat. Hazards Earth Syst. Sci., 22, 1683–1698, https://doi.org/10.5194/nhess-22-1683-2022,https://doi.org/10.5194/nhess-22-1683-2022, 2022
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Cited articles

Borges, A., Royer, C., Martin, J. L., Champenois, W., and Gypens, N.: Response of marine methane dissolved concentrations and emissions in the Southern North Sea to the European 2018 heatwave, Cont. Shelf Res., 190, 104004, https://doi.org/10.1016/j.csr.2019.104004, 2019. 
Chegini, F., Holtermann, P., Kerimoglu, O., Becker, M., Kreus, M., Klingbeil, K., Gräwe, U., Winter, C. and Burchard, H.: Processes of stratification and destratification during an extreme river discharge event in the German Bight ROFI, J. Geophys. Res.-Oceans, 125, e2019JC015987, https://doi.org/10.1029/2019JC015987, 2020. 
Chen, W., Staneva, J., Grayek, S., Schulz-Stellenfleth, J., and Greinert, J.: The role of heat wave events in the occurrence and persistence of thermal stratification in the southern North Sea, Nat. Hazards Earth Syst. Sci., 22, 1683–1698, https://doi.org/10.5194/nhess-22-1683-2022, 2022. 
Collins, M., Knutti, R., Arblaster, J., Dufresne, J.-L., Fichefet, T., Friedlingstein, P., Gao, X., Gutowski, W. J., Johns, T., Krinner, G., Shongwe, M., Tebaldi, C., Weaver, A. J., and Wehner, M.: Long-term climate change: projections, commitments and irreversibility, in: Climate change 2013: the physical science basis, Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Stocker, T. F., Qin, D., Plattner, G.-K., Tignor, M., Allen, S. K., Boschung, J., Nauels, A., Xia, Y., Bex, V., and Midgley, P. M., Cambridge University Press, https://www.ipcc.ch/site/assets/uploads/2018/02/WG1AR5_Chapter12_FINAL.pdf (last access: 21 March 2024), 2013. 
EU Copernicus Marine Service Product: Atlantic-European North West Shelf-Ocean Physics Reanalysis, Mercator Ocean International [data set], https://doi.org/10.48670/moi-00059, 2021. 
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Short summary
Marine heatwaves (MHWs), which are the unusually warm periods in the ocean, are becoming more frequent and lasting longer in the northwest European Shelf (NWES), particularly near the coast, from 1993 to 2023. However, thermal stratification is weakening, implying that the sea surface warming caused by MHWs is insufficient to counteract the overall stratification decline due to global warming. Moreover, the varying salinity has a notable impact on the trend of density stratification change.
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