A note on ADCP-based indirect observations of turbulence

• Main Authors: Enmar, Linda, Lake, Iréne, Lundberg, Peter, Sigray, Peter
• Format: Article in Journal/Newspaper
• Language: English
• Published: Stockholms universitet, Meteorologiska institutionen (MISU) 2016
• Subjects: Earth and Related Environmental Sciences; Geovetenskap och miljövetenskap; Faroe Bank; Boreal Environment Research
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-130646

A 70-day data set from bottom-mounted ADCPs on the two sides of the Faroe-Bank Channel was analysed using the recorded flow variance and echo intensity in the deeper reaches of the passage as proxies for turbulence. A consistent picture emerged, not least since the data losses (which were ascribed to turbulence-induced activation of the fish-elimination option in the ADCP software) could be shown to co-vary with the internal M-2 tide affecting the vertical shear, which in turn proved to be correlated with the flow variance.