On the Effect of Offshore Wind Farms on the Atmosphere and Ocean Dynamics by Elke Ludewig

Author:Elke Ludewig
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

The sensitivity run, src60, preventing vertical exchange of momentum, vertical advection, and diffusion of temperature and salinity (TS), shows a weaker effect in surface elevation due to a stronger impact on velocities but does not show an effect in the hydrographic stratification, and the thermocline does not form an excursion around the OWF. Higher velocities are based on a constant hydrographic field unpersuaded by additional changes in the density and so the pressure field.

Figure 5.12 illustrates the difference in temperature along the cross section from S to N through the OWF for the normal simulation src50 and the run src60 without vertical exchange processes. Runs without vertical TS exchange processes have a warmer upper layer because the exchange of heat is forbidden, while in the normal run, the upper layers become cooler due to the exchange via the thermocline. The other way around is also explained by the exchange via the thermocline, which ends in warmer layers close below the thermocline.

Fig. 5.12Comparison of the OWFr temperature stratification along the S–N cross section through 12-turbine OWF around P(0,0) between (a) the normal run (src50) and (b) the sensitivity run, avoiding vertical exchange of momentum, vertical diffusion, and advection (src60) after 1 day of OWF operation. The vertical changes in the hydrographic conditions are forbidden in src60. Illustration (c) shows the difference between src50 and src60. The dashed horizontal line marks the depth of the thermocline, the dashed–dotted lines mark the OWF area, and the solid lines accent the effect dimension

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