WWK-Wiki am IfM

Am Windwellenkanal der Uni Hamburg werden grundlegende Untersuchungen durchgeführt zu Wechselwirkungen an der Wasseroberfläche und zu ihrer Fernerkundung. Flüsse von Energie, Impuls, Gas und Wärme, sowie die verantwortlichen kleinskaligen Prozesse, können gezielt variiert und untersucht werden. Hierzu finden regelmäßig Messkampagnen am Windwellenkanal statt, deren Ergebnisse wertvolle Beiträge zur Entwicklung von Theorien zu Wechselwirkungen zwischen Ozean und Atmosphäre sowie zur (Radar-) Fernerkundung der Meeresoberfläche liefern.

The wind_wave tank was built in the early 1970s and is located in a hall at the Federal Institute of Waterways Engineering in Hamburg-Rissen. The water-filled part of the large facility is 24 m long and 1 m wide, and the air volume is 1 m high. The tank is filled with fresh water, a radial blower is used to generate wind speeds up to 25 m/s and a wave flap to generate long waves of frequencies between 0.7 Hz and 2.5 Hz.m/s erzeugt werden und mit einer Wellenklappe lange Wellen mit Frequenzen zwischen 0.7 Hz und 2.5 Hz.

In the late 1990s, a rain generator was developed and installed to generate heavy rain of up to 300 mm/h on an area of 2.3 m². In the mid 2000s an air re-circulation was added and the tank was made air-tight, thereby allowing comprehensive gas exchange measurements.

The wind-wave tank is very well suited for experiments under controlled environmental conditions. E.g., in order to simulate biogenic films on the sea surface chemical model substances can be deployed, which form surface films of only one molecule thickness. The impact of those films on the small-scale wave and current field, and on the backscattered radar power, can be studied in great detail. Taking advantage of its flexible usage, the wind-wave tank can be well used to study a wealth of scientific aspects and to help in interpreting remotely sensed data.


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Practicals: Ozeanische Messübungen am WWK