Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Heincke	HE429	18.07.2014 - 27.07.2014		German Bight North Sea

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Floeter Jens	Institut fur Hydrobiologie und Fischereiwissenschaft der Universitat Hamburg	Cuxhaven	Bremerhaven	Karte Map

Ziel der Reise / Objectives of Cruise:

Offshore wind farms can excite the so-called wake effect which impacts the atmospheric turbulence; disturbed wind fields again affect the local ocean circulation. Due to the wake effect, zones of upwelling and downwelling are formed already shortly after turning-on rotators. The dimension of these cells can be several kilometres with a vertical velocity in the order of > 1?m/sec influencing the dynamic of an area being over 100 times bigger than the wind park itself. The physical process behind the formation of these vertical patterns is a combination of Ekman Pumping and a changed vertical exchange both due to an induced divergence in the wind field. The generated upwelling is strong enough so that the local ecosystem will most likely be significantly influenced by the presence of a wind farm. Additional, direct turbulent mixing of the water column is induced by windpark structures. The goal of the WAKE cruise was to measure the so far largely theoretical physical and hypothetical ecological follow-up processes across the trophic levels from primary production up to the aggregation of planktivorous fish. During the cruise measurements were obtained around the offshore wind farms BARD Offshore 1, Global Tech I and Alpha Ventus.

Messungen / Measurements