Articles | Volume 15, issue 6
https://doi.org/10.5194/os-15-1615-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-15-1615-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Increasing turbidity in the North Sea during the 20th century due to changing wave climate
Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, PL1
3DH, UK
Department of Mathematics and Statistics, University of Strathclyde,
Glasgow, Scotland, G1 1XH, UK
Michael R. Heath
Department of Mathematics and Statistics, University of Strathclyde,
Glasgow, Scotland, G1 1XH, UK
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Cited articles
Aarnes, O. J., Reistad, M., Breivik, Ø., Bitner-Gregersen, E., Ingolf Eide, L., Gramstad, O., Magnusson, A. K., Natvig, B., and Vanem, E.: Projected changes in significant wave height toward the end of the 21st century: Northeast Atlantic, J. Geophys. Res.-Oceans, 122, 3394–3403,
https://doi.org/10.1002/2016JC012521, 2017.
Aarup, T.: Transparency of the North Sea and Baltic Sea – A Secchi depth
data mining study, Oceanologia, 44, 323–337, 2002.
Aldridge, J. N., Parker, E. R., Bricheno, L. M., Green, S. L., and van der
Molen, J.: Assessment of the physical disturbance of the northern European
Continental shelf seabed by waves and currents, Cont. Shelf Res., 108, 121–140, https://doi.org/10.1016/j.csr.2015.03.004, 2015.
Capuzzo, E., Lynam, C. P., Barry, J., Stephens, D., Forster, R. M., Greenwood, N., McQuatters‐Gollop, A., Silva, T., van Leeuwen, S. M., and Engelhard, G. H.: A decline in primary production in the North Sea over 25 years, associated with reductions in zooplankton abundance and fish stock recruitment, Glob. Change Biol., 24, 352–364, https://doi.org/10.1111/gcb.13916, 2017.
Capuzzo, E., Stephens, D., Silva, T., Barry, J., and Forster, R. M.: Decrease in water clarity of the southern and central North Sea during the 20th century, Glob. Change Biol., 21, 2206–2214, https://doi.org/10.1111/gcb.12854, 2015.
Coma, R., Ribes, M., Serrano, E., Jiménez, E., Salat, J., and Pascual, J.: Global warming-enhanced stratification and mass mortality events in the
mediterranean, P. Natl. Acad. Sci. USA, 106, 6176–6181, 2009.
De Dominicis, M., O'Hara Murray, R., and Wolf, J.: Multi-scale ocean response to a large tidal stream turbine array, Renew. Energ., 114, 1160–1179,
https://doi.org/10.1016/j.renene.2017.07.058, 2017.
De Dominicis, M., Wolf, J., and O'Hara Murray, R.: Comparative Effects of
Climate Change and Tidal Stream Energy Extraction in a Shelf Sea, J. Geophys. Res.-Oceans, 123, 5041–5067, 2018.
Dee, D. P., Uppala, S. M., Simmons, A. J., Berrisford, P., Poli, P., Kobayashi, S., Andrae, U., Balmaseda, M. A., Balsamo, G., Bauer, P., Bechtold, P., Beljaars, A. C., van de Berg, L., Bidlot, J., Bormann, N., Delsol, C., Dragani, R., Fuentes, M., Geer, A. J., Haimberger, L., Healy, S. B., Hersbach, H., Hólm, E. V., Isaksen, L., Kållberg, P., Köhler, M., Matricardi, M., McNally, A. P., Monge‐Sanz, B. M., Morcrette, J., Park, B., Peubey, C., de Rosnay, P., Tavolato, C., Thépaut, J., and Vitart, F.: The ERA-Interim reanalysis: Configuration and performance of the data assimilation system, Q. J. Roy. Meteor. Soc., 137, 553–597,
https://doi.org/10.1002/qj.828, 2011.
Devlin, M. J., Barry, J., Mills, D. K., Gowen, R. J., Foden, J., Sivyer, D., and Tett, P.: Relationships between suspended particulate material, light attenuation and Secchi depth in UK marine waters, Estuar. Coast. Shelf S., 79, 429–439, https://doi.org/10.1016/j.ecss.2008.04.024, 2008.
Diesing, M., Stephens, D., and Aldridge, J.: A proposed method for assessing the
extent of the seabed significantly affected by demersal fishing in the
Greater North Sea, ICES J. Mar. Sci., 70, 1085–109,
https://doi.org/10.1093/icesjms/fst048, 2013.
Dupont, N. and Aksnes, D. L.: Effects of bottom depth and water clarity on the vertical distribution of Calanus spp, J. Plankton Res., 34,
263–266, https://doi.org/10.1093/plankt/fbr096, 2012.
Dupont, N. and Aksnes, D.: Centennial changes in water clarity of the Baltic Sea and the North Sea, Estuar. Coast. Shelf S., 131, 282–289,
https://doi.org/10.1016/j.ecss.2013.08.010, 2013.
Eddelbuettel, D., Francois, R., Allaire, J., Chambers, J., Bates, D., and Ushey, K.: Rcpp: Seamless R and C integration, J. Stat. Softw., 40, 1–18, 2011.
Gohin, F.: Annual cycles of chlorophyll-a, non-algal suspended particulate matter, and turbidity observed from space and in-situ in coastal waters, Ocean Sci., 7, 705–732, https://doi.org/10.5194/os-7-705-2011, 2011.
Grabemann, I., Groll, N., Mollër, J., and Weisse, R.: Climate change impact on North Sea wave conditions: a consistent analysis of ten projections, Ocean Dynam., 65, 255–267, https://doi.org/10.1007/s10236-014-0800-z, 2015.
Gulev, S. K. and Grigorieva, V.: Variability of the winter wind waves and swell in the North Atlantic and North Pacific as revealed by the voluntary
observing ship data, J. Climate, 19, 5667–5685, https://doi.org/10.1175/JCLI3936.1, 2006.
Håkanson, L.: The relationship between salinity, suspended particulate
matter and water clarity in aquatic systems, Ecol. Res., 21, 75–90, https://doi.org/10.1007/s11284-005-0098-x, 2006.
Heath, M., Sabatino, A., Serpetti, N., McCaig, C., and O'Hara Murray, R.:
Modelling the sensitivity of suspended sediment profiles to tidal current
and wave conditions, Ocean Coast. Manage., 147, 49–66,
https://doi.org/10.1016/j.ocecoaman.2016.10.018, 2017.
Heath, M. R., Speirs, D. C., and Steele, J. H.: Understanding patterns and
processes in models of trophic cascades, Ecol. Lett., 17, 101–114, 2016.
Hemer, M. A., Fan, Y., Mori, N., Semedo, A., and Wang, X. L.: Projected changes in wave climate from a multi-model ensemble, Nat. Clim. Change, 3,
471–476, https://doi.org/10.1038/nclimate1791, 2013.
Jafar-Sidik, M., Gohin, F., Bowers, D., Howarth, J., and Hull, T.: The
relationship between Suspended Particulate Matter and Turbidity at a mooring
station in a coastal environment: consequences for satellite-derived
products, Oceanologia, 59, 365–378, https://doi.org/10.1016/j.oceano.2017.04.003, 2017.
Neill, S. P., Hashemi, M. R., and Lewis, M. J.: Optimal phasing of the European tidal stream resource using the greedy algorithm with penalty function, Energy, 73, 997–1006, https://doi.org/10.1016/j.energy.2014.07.002, 2014.
O'Dea, E. J., Arnold, A. K., Edwards, K. P., Furner, R., Hyder, P., Martin,
M. J., Siddorn, J. R., Storkey, D., While, J., Holt, J. T., and Liu, H.: An
operational ocean forecast system incorporating NEMO and SST data
assimilation for the tidally driven European North-West shelf, J. Oper. Oceanogr., 5, 3–17, https://doi.org/10.1080/1755876X.2012.11020128, 2014.
Opdal, A. F., Lindemann, C., and Aksnes, D. L.: Centennial decline in North
Sea water clarity causes strong delay in phytoplankton bloom timing, Glob. Change Biol., 25, 3946–3953, https://doi.org/10.1111/gcb.14810, 2019.
Poli, P., Hersbach, H., Dee, D. P., Berrisford, P., Simmons, A. J., Vitart, F., Laloyaux, P., Tan, D. G., Peubey, C., Thépaut, J., Trémolet, Y., Hólm, E. V., Bonavita, M., Isaksen, L., and Fisher, M.: ERA-20C: An Atmospheric Reanalysis of the Twentieth Century, J. Climate, 29, 4083–4097,
https://doi.org/10.1175/JCLI-D-15-0556.1, 2016.
Quante, M. and Colijn, F.: North Sea Region Climate Assessment, Springer, Cham, https://doi.org/10.1007/978-3-319-39745-0, 2016.
Schulzweida, U.: CDO User's Guide, Climate data operators, Version 1.9.0, 1–206, 2017.
Semedo, A., Vettor, R., Breivik, Ø,, Sterl, A., Reistad, M., Soares, C.
G., and Lima, D.: The wind sea and swell waves climate in the Nordic seas, Ocean Dynam., 65, 223–240, https://doi.org/10.1007/s10236-014-0788-4, 2015.
Soulsby, R.: Simplified calculation of wave orbital velocities, HR Wallingford Ltd., Wallingford, UK, Tech. rep., 28 pp., 2006.
Soulsby, R. L. and Clarke, S.: Bed shear-stresses under combined waves and
currents on smooth and rough beds, HR Wallingford Ltd., Wallingford, UK, Report TR137, 52 pp., 2005.
van der Molen, J., Ruardij, P., and Greenwood, N.: A 3D SPM model for
biogeochemical modelling, with application to the northwest European
continental shelf, J. Sea Res., 127, 63–81, https://doi.org/10.1016/j.seares.2016.12.003, 2016.
Vikebø, F., Furevik, T., Furnes, G., Kvamstø, N. G., and Reistad, M.: Wave height variations in the North Sea and on the Norwegian Continental Shelf, 1881–1999, Cont. Shelf Res., 23, 251–263, https://doi.org/10.1016/S0278-4343(02)00210-8, 2003.
Wang, X. L., Feng, Y., and Swail, V. R.: Changes in global ocean wave heights as projected using multimodel CMIP5 simulations, Geophys. Res. Lett.,
41, 1026–1034, https://doi.org/10.1002/2013GL058650, 2014.
Wang, X. L., Feng, Y., and Swail, V. R.: Climate change signal and uncertainty in
CMIP5-based projections of global ocean surface wave heights, J. Geophys. Res.-Oceans, 120, 3859–3871, https://doi.org/10.1002/2015JC010699, 2015.
Weatherall, P., Marks, K. M., Jakobsson, M., Schmitt, T., Tani, S., Arndt, J. E., Rovere, M., Chayes, D, Ferini, V., and Wigley, R.: A new digital bathymetric model of the world's oceans, Earth and Space Science, 2, 331–345, https://doi.org/10.1002/2015EA000107, 2015.
Weisse, R., von Storch, H., Niemeyer, H. D., and Knaack, H.: Changing North Sea storm surge climate: An increasing hazard?, Ocean Coast. Manage., 68,
58–68, https://doi.org/10.1016/j.ocecoaman.2011.09.005, 2012.
Wickham, H. and Francois, R.: dplyr: A grammar of data manipulation, R package version 0.43, 2016.
Wilson, R.: r4ecology/bedshear: v1.0, Version ocean_sciences, Zenodo, https://doi.org/10.5281/zenodo.3478185, 2019.
Wilson, R. J., Speirs, D. C., Sabatino, A., and Heath, M. R.: A synthetic map of the north-west European Shelf sedimentary environment for applications in marine science, Earth Syst. Sci. Data, 10, 109–130, https://doi.org/10.5194/essd-10-109-2018, 2018.
Wunsch, C.: The long-period tides, Rev. Geophys., 5, 447–475, 1967.
Short summary
The North Sea became much less clear during the 20th century, with potential consequences for primary production. This study analyses the hypothesis that changes in wave regime were a key driver of this change. We hindcast bed shear stress over the 20th century using a long-term wave reanalysis. Shear stress increased by over 20 % in large parts of the southern and central North Sea during the 20th century. An increase of this magnitude would have caused a large decline in water clarity.
The North Sea became much less clear during the 20th century, with potential consequences for...