Numerical modeling of suspended matter transport in the North Sea

Gayer, Gerhard; Dick, S.; Pleskachevsky, Andrey; Rosenthal, Wolfgang

doi:10.1007/s10236-006-0070-5

Cited by 37 publications

(49 citation statements)

References 23 publications

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“…It drives the exchange processes between the water and the seabed according to the threshold values for sedimentation, resuspension and erosion. The choice of the threshold values for V * is based on the analysis of the measured and experimental data for the German Bight (located in the south-eastern part of the North Sea) and the North Sea described in Pohlmann and Puls (1994) and Gayer et al (2006). In this study, the following values are used:…”

Section: Exchange Processes At the Seabed-water Interfacementioning

confidence: 99%

“…Differing from the approach used by Gayer et al (2006), which assumes a constant bioturbation rate, CTM-SPM includes seasonally and spatially variable bioturbation in the seabed. Exchange within the sediment compartment due to biotic activity is modeled by a diffusion equation with a coefficient for bioturbation Av bio (m 2 s −1 )…”

Section: Seabed Processesmentioning

confidence: 99%

“…3c). Storm conditions in the model start when significant wave heights near the coast are > 2 m, based on the three years wave-height statistics near cliffs (Gayer et al, 2006). Significant wave heights for the year 2002 and 2003 calculated by the wave model WAM are used to estimate the SPM load from cliffs (see Section 2.2.4 and Fig.…”

Section: Spm Concentrations In the Rivers Cliffs And Open Boundariesmentioning

confidence: 99%

“…SPM concentration at the open boundaries of the North Atlantic and the English Channel is assumed to be constant in time and vertically integrated over the water column with values of 5 and 8 mg l −1 respectively (Puls et al, 1997;Gayer et al, 2006). The distribution between the SPM fractions in the English cliffs and at the open boundaries is given in Table 1.…”

Section: Spm Concentrations In the Rivers Cliffs And Open Boundariesmentioning

confidence: 99%

“…6). For more details about the method used for processing of fine sediment map, see Pleskachevsky et al (2005) and Gayer et al (2006).…”

Section: Correction Of Fine Sediment Mapmentioning

confidence: 99%

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Effect of waves and currents on the dynamics and seasonal variations of suspended particulate matter in the North Sea

Dobrynin¹,

Gayer²,

Pleskachevsky³

et al. 2010

Journal of Marine Systems

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Effect of waves and currents on the dynamics and seasonal variations of suspended particulate matter (SPM) in the North Sea is investigated by a three-dimensional Circulation and Transport Model for SPM (CTM-SPM) in 2002 and 2003, forced by waves and meteorological data. Calculated fine sediment exchange processes at the seawater-seabed interface are driven by the instant values of the shear stress velocity due to currents and waves. Modeled SPM concentrations are compared with in-situ measurements and satellite snap-shot images. As a result of the action of currents and waves, local bathymetry and the fine sediment content at the sea bottom, modeled time series show different short-term dynamics of SPM concentrations in various locations in the North Sea. On a longer time scale, currents and waves result in different seasonal distributions of the shear stress velocity typical for the calm (April -October) and the storm (OctoberApril) periods. Accordingly, our model calculates different seasonal distributions of SPM with the mean surface concentrations of about 2 mg l −1 in the calm and > 5 mg l −1 in the storm periods. Waves lead to a higher frequency of resuspension and erosion events and increase mixing intensity in the water column during storm periods. During calm periods, SPM distribution is mainly shaped by currents. A different pattern, characterized by high SPM concentrations in offshore areas, evolves instantly during transient storms events.

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Section: Exchange Processes At the Seabed-water Interfacementioning

confidence: 99%

Section: Seabed Processesmentioning

confidence: 99%

Section: Spm Concentrations In the Rivers Cliffs And Open Boundariesmentioning

confidence: 99%

Section: Spm Concentrations In the Rivers Cliffs And Open Boundariesmentioning

confidence: 99%

“…6). For more details about the method used for processing of fine sediment map, see Pleskachevsky et al (2005) and Gayer et al (2006).…”

Section: Correction Of Fine Sediment Mapmentioning

confidence: 99%

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Effect of waves and currents on the dynamics and seasonal variations of suspended particulate matter in the North Sea

Dobrynin¹,

Gayer²,

Pleskachevsky³

et al. 2010

Journal of Marine Systems

Self Cite

View full text Add to dashboard Cite

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Impacts of nonbreaking wave‐stirring‐induced mixing on the upper ocean thermal structure and typhoon intensity in the South China Sea

Peng

Wang

et al. 2014

JGR Oceans

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To investigate the effect of nonbreaking wave-induced mixing caused by surface wave stirring on the upper ocean thermal structure (UOTS) and the typhoon intensity, a simple nonbreaking wavestirring-induced mixing parameterization (WMP) scheme is incorporated into a regional coupled atmosphere-ocean model for the South China Sea (SCS), which couples the Princeton Ocean Model (POM) to the Weather Research and Forecasting (WRF) model using the OASIS3 coupler. The results of simulating two selected typhoon cases indicate that the nonbreaking wave-stirring-induced mixing has significant impacts on UOTS and the typhoon intensity, and the incorporation of the simple WMP scheme in the coupled model helps to improve the simulation of UOTS and thus the typhoon intensity. In the case that the typhoon intensity is underestimated by the atmosphere model alone, the improvement of initial UOTS by the ocean model with the WMP included can deepen the initial thermocline depth, reduce the effect of SST cooling, and prevent the typhoon intensity from undesired weakening. In the case that the typhoon intensity is overestimated (with strong winds), including the WMP in the ocean model significantly enhances the total vertical mixing rate in the upper ocean, which in turn enhances the SST cooling and thus reduces the typhoon intensity as desired. The results obtained in this study make a contribution to the ongoing efforts of improving the typhoon intensity forecast using a regional atmosphere-ocean coupled model by worldwide researchers and forecasters, especially for the typhoons in the SCS regions.

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Recent Change—North Sea

Huthnance

Weisse

Wahl

et al. 2016

North Sea Region Climate Change Assessment

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This chapter discusses past and ongoing change in the following physical variables within the North Sea: temperature, salinity and stratification; currents and circulation; mean sea level; and extreme sea levels. Also considered are carbon dioxide; pH and nutrients; oxygen; suspended particulate matter and turbidity; coastal erosion, sedimentation and morphology; and sea ice. The distinctive character of the Wadden Sea is addressed, with a particular focus on nutrients and sediments. This chapter covers the past 200 years and focuses on the historical development of evidence (measurements, process understanding and models), the form, duration and accuracy of the evidence available, and what the evidence shows in terms of the state and trends in the respective variables. Much work has focused on detecting long-term change in the North Sea region, either from measurements or with models. Attempts to attribute such changes to, for example, anthropogenic forcing are still missing for the North Sea. Studies are urgently needed to assess consistency between observed changes and current expectations, in order to increase the level of confidence in projections of expected future conditions.

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Numerical modeling of suspended matter transport in the North Sea

Cited by 37 publications

References 23 publications

Effect of waves and currents on the dynamics and seasonal variations of suspended particulate matter in the North Sea

Effect of waves and currents on the dynamics and seasonal variations of suspended particulate matter in the North Sea

Impacts of nonbreaking wave‐stirring‐induced mixing on the upper ocean thermal structure and typhoon intensity in the South China Sea

Recent Change—North Sea

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