The impact of intertidal areas on the carbonate system of the southern North Sea
The coastal ocean is strongly affected by ocean acidification because of its shallow water depths, low volume, and the closeness to terrestrial dynamics. Earlier observations of dissolved inorganic carbon (DIC) and total alkalinity (TA) in the southern part of the North Sea, a northwest European she...
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fthzgzmk:oai:publications.hereon.de:38778 2023-06-11T04:15:44+02:00 The impact of intertidal areas on the carbonate system of the southern North Sea Schwichtenberg, F. Pätsch, J. Böttcher, M. Thomas, H. Winde, V. Emeis, K. 2020 https://publications.hereon.de/id/38778 https://publications.hzg.de/id/38778 https://doi.org/10.5194/bg-17-4223-2020 en eng EGU - Copernicus Publication https://dx.doi.org/10.5194/bg-17-4223-2020 urn:issn:1726-4170 https://publications.hereon.de/id/38778 https://publications.hzg.de/id/38778 info:eu-repo/semantics/openAccess open_access oa_gold issn:1726-4170 Schwichtenberg, F.; Pätsch, J.; Böttcher, M.; Thomas, H.; Winde, V.; Emeis, K.: The impact of intertidal areas on the carbonate system of the southern North Sea. In: Biogeosciences. Vol. 17 (2020) 16, 4223 - 4245. (DOI: /10.5194/bg-17-4223-2020) info:eu-repo/semantics/article Zeitschrift Artikel 2020 fthzgzmk https://doi.org/10.5194/bg-17-4223-2020 2023-05-28T23:25:01Z The coastal ocean is strongly affected by ocean acidification because of its shallow water depths, low volume, and the closeness to terrestrial dynamics. Earlier observations of dissolved inorganic carbon (DIC) and total alkalinity (TA) in the southern part of the North Sea, a northwest European shelf sea, revealed lower acidification effects than expected. It has been assumed that anaerobic degradation and subsequent TA release in the adjacent back-barrier tidal areas (Wadden Sea) in summertime is responsible for this phenomenon. In this study the exchange rates of TA and DIC between the Wadden Sea tidal basins and the North Sea and the consequences for the carbonate system in the German Bight are estimated using a 3D ecosystem model. The aim of this study is to differentiate the various sources contributing to observed high summer TA in the southern North Sea. Measured TA and DIC in the Wadden Sea are considered as model boundary conditions. This procedure acknowledges the dynamic behaviour of the Wadden Sea as an area of effective production and decomposition of organic material. According to the modelling results, 39 Gmol TA yr−1 were exported from the Wadden Sea into the North Sea, which is less than a previous estimate but within a comparable range. The interannual variabilities in TA and DIC, mainly driven by hydrodynamic conditions, were examined for the years 2001–2009. Dynamics in the carbonate system are found to be related to specific weather conditions. The results suggest that the Wadden Sea is an important driver for the carbonate system in the southern North Sea. On average 41 % of TA inventory changes in the German Bight were caused by riverine input, 37 % by net transport from adjacent North Sea sectors, 16 % by Wadden Sea export, and 6 % were caused by internal net production of TA. The dominant role of river input for the TA inventory disappears when focusing on TA concentration changes due to the corresponding freshwater fluxes diluting the marine TA concentrations. The ratio of exported TA ... Article in Journal/Newspaper Ocean acidification Hereon Publications (Helmholtz-Zentrum) Biogeosciences 17 16 4223 4245 |
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Hereon Publications (Helmholtz-Zentrum) |
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fthzgzmk |
language |
English |
description |
The coastal ocean is strongly affected by ocean acidification because of its shallow water depths, low volume, and the closeness to terrestrial dynamics. Earlier observations of dissolved inorganic carbon (DIC) and total alkalinity (TA) in the southern part of the North Sea, a northwest European shelf sea, revealed lower acidification effects than expected. It has been assumed that anaerobic degradation and subsequent TA release in the adjacent back-barrier tidal areas (Wadden Sea) in summertime is responsible for this phenomenon. In this study the exchange rates of TA and DIC between the Wadden Sea tidal basins and the North Sea and the consequences for the carbonate system in the German Bight are estimated using a 3D ecosystem model. The aim of this study is to differentiate the various sources contributing to observed high summer TA in the southern North Sea. Measured TA and DIC in the Wadden Sea are considered as model boundary conditions. This procedure acknowledges the dynamic behaviour of the Wadden Sea as an area of effective production and decomposition of organic material. According to the modelling results, 39 Gmol TA yr−1 were exported from the Wadden Sea into the North Sea, which is less than a previous estimate but within a comparable range. The interannual variabilities in TA and DIC, mainly driven by hydrodynamic conditions, were examined for the years 2001–2009. Dynamics in the carbonate system are found to be related to specific weather conditions. The results suggest that the Wadden Sea is an important driver for the carbonate system in the southern North Sea. On average 41 % of TA inventory changes in the German Bight were caused by riverine input, 37 % by net transport from adjacent North Sea sectors, 16 % by Wadden Sea export, and 6 % were caused by internal net production of TA. The dominant role of river input for the TA inventory disappears when focusing on TA concentration changes due to the corresponding freshwater fluxes diluting the marine TA concentrations. The ratio of exported TA ... |
format |
Article in Journal/Newspaper |
author |
Schwichtenberg, F. Pätsch, J. Böttcher, M. Thomas, H. Winde, V. Emeis, K. |
spellingShingle |
Schwichtenberg, F. Pätsch, J. Böttcher, M. Thomas, H. Winde, V. Emeis, K. The impact of intertidal areas on the carbonate system of the southern North Sea |
author_facet |
Schwichtenberg, F. Pätsch, J. Böttcher, M. Thomas, H. Winde, V. Emeis, K. |
author_sort |
Schwichtenberg, F. |
title |
The impact of intertidal areas on the carbonate system of the southern North Sea |
title_short |
The impact of intertidal areas on the carbonate system of the southern North Sea |
title_full |
The impact of intertidal areas on the carbonate system of the southern North Sea |
title_fullStr |
The impact of intertidal areas on the carbonate system of the southern North Sea |
title_full_unstemmed |
The impact of intertidal areas on the carbonate system of the southern North Sea |
title_sort |
impact of intertidal areas on the carbonate system of the southern north sea |
publisher |
EGU - Copernicus Publication |
publishDate |
2020 |
url |
https://publications.hereon.de/id/38778 https://publications.hzg.de/id/38778 https://doi.org/10.5194/bg-17-4223-2020 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
issn:1726-4170 Schwichtenberg, F.; Pätsch, J.; Böttcher, M.; Thomas, H.; Winde, V.; Emeis, K.: The impact of intertidal areas on the carbonate system of the southern North Sea. In: Biogeosciences. Vol. 17 (2020) 16, 4223 - 4245. (DOI: /10.5194/bg-17-4223-2020) |
op_relation |
https://dx.doi.org/10.5194/bg-17-4223-2020 urn:issn:1726-4170 https://publications.hereon.de/id/38778 https://publications.hzg.de/id/38778 |
op_rights |
info:eu-repo/semantics/openAccess open_access oa_gold |
op_doi |
https://doi.org/10.5194/bg-17-4223-2020 |
container_title |
Biogeosciences |
container_volume |
17 |
container_issue |
16 |
container_start_page |
4223 |
op_container_end_page |
4245 |
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1768372786090213376 |