Seasonal and long-term changes in pH in the Dutch coastal zone

Recent observations and modelling studies suggest that biogeochemical changes can mask atmospheric CO(2)-induced pH decreases. Data collected by the Dutch monitoring authorities in different coastal systems (North Sea, Wadden Sea, Ems-Dollard, Eastern Scheldt and Scheldt estuary) since 1975 provide...

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Bibliographic Details
Published in:Biogeosciences
Main Authors: Provoost, P., van Heuven, S., Soetaert, K., Laane, R. W. P. M., Middelburg, J. J.
Format: Article in Journal/Newspaper
Language:English
Published: 2010
Subjects:
PHYTOPLANKTON PRIMARY PRODUCTION
TIME-SERIES ANALYSIS
SOUTHERN NORTH-SEA
PAST 50 YEARS
OCEAN ACIDIFICATION
SCHELDT ESTUARY
TIDAL ESTUARIES
AQUATIC SYSTEMS
MODEL
NETHERLANDS
Ocean acidification
Online Access:https://hdl.handle.net/11370/099e90fd-6898-4b02-9b8e-dd11fd1c6175
https://research.rug.nl/en/publications/099e90fd-6898-4b02-9b8e-dd11fd1c6175
https://doi.org/10.5194/bg-7-3869-2010
https://pure.rug.nl/ws/files/53982004/bg_7_3869_2010.pdf
Description
Summary:Recent observations and modelling studies suggest that biogeochemical changes can mask atmospheric CO(2)-induced pH decreases. Data collected by the Dutch monitoring authorities in different coastal systems (North Sea, Wadden Sea, Ems-Dollard, Eastern Scheldt and Scheldt estuary) since 1975 provide an excellent opportunity to test whether this is the case in the Dutch coastal zone. The time-series were analysed using Multi-Resolution Analysis (MRA) which resulted in the identification of system-dependent patterns on both seasonal and intra-annual time scales. The observed rates of pH change greatly exceed those expected from enhanced CO(2) uptake, thus suggesting that other biogeochemical processes, possibly related to changes in nutrient loading, can play a dominant role in ocean acidification.

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