Tidal resuspension and deposition of particulate matter in the Oyster Grounds, North Sea

摘要

Moored current meters, fluorometers and transmissometers were used in combination with sediment traps (aspect ratio >4) and shipborne sampling to determine fluxes of deposition and resuspension of total suspended matter (TSM) under tidal action in the 45 m deep Oyster Grounds, North Sea. Here, we present data from the mixed layer below the major thermocline at about 20 m above the bottom (mab) as obtained during a 14-day period of calm weather in July 1994. Around neap tide near-bottom current velocities remained smaller than 0.15 m s~-1 and TSM was dominated by particles advected from a relatively turbid area to the southeast of the study site.