Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5766096 | Journal of Sea Research | 2017 | 37 Pages |
Abstract
The analysis of 1.8Â years of data gives an understanding of the response to varying forcing of suspended particulate matter (SPM) and chlorophyll-a (CHL-a) in a coastal turbidity maximum zone (TMZ). Both temporal and vertical concentration variations in the near-bed layer (0-2Â m) in the shallow (11Â m deep) coastal zone at 1Â km off the Dutch coast are shown. Temporal variations in the concentration of both parameters are found on tidal and seasonal scales, and a marked response to episodic events (e.g. storms). The seasonal cycle in the near-bed CHL-a concentration is determined by the spring bloom. The role of the wave climate as the primary forcing in the SPM seasonal cycle is discussed. The tidal current provides a background signal, generated predominantly by local resuspension and settling and a minor role is for advection in the cross-shore and the alongshore direction. We tested the logarithmic Rouse profile to the vertical profiles of both the SPM and the CHL-a data, with respectively 84% and only 2% success. The resulting large percentage of low Rouse numbers for the SPM profiles suggest a mixed suspension is dominant in the TMZ, i.e. surface SPM concentrations are in the same order of magnitude as near-bed concentrations.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Oceanography
Authors
C.M. van der Hout, R. Witbaard, M.J.N. Bergman, G.C.A. Duineveld, M.J.C. Rozemeijer, T. Gerkema,