Publication Date:
2023-01-30
Description:
Field studies were conducted in two different areas of the Limfjorden, in Lovns Bredning (26th February to 4th March 2017) and in Løgstør Bredning (6-10th March 2017). In each sampling area, 16 fixed-position moorings were deployed in two circular sensor arrays around a mussel dredging area to investigate possible effects of dredging related sediment plumes (Pastor et al, 2020). The inner array (stations 1 - 8) had a diameter of 200 m and the outer array (stations 9 - 16) was set up with a diameter of 600 m. Integrated temperature and light loggers (HOBO Pendant Temperature/Light 64K Data Logger) were mounted on each mooring in the two circular arrays at three different water depths (0.5, 1.5 and 3.0 m above seabed). The 48 loggers (3 depths and 16 stations) were deployed in each area over a period of four days and light intensity time series were collected with a sampling interval of 30 seconds. Five loggers in the Lovns area did not provide any data due to technical problems (two near-surface loggers and three loggers at 1.5 m above the seabed). However, only one bottom logger at Løgstør Bredning failed to provide data. Each time series was filtered using a 3-minute moving average for removing the largest outliers, but retaining sharp changes in light intensity associated with short-lived sediment plumes caused by experimental mussel dredging.
Keywords:
Date/Time local; Event label; Height above sea floor/altitude; HOBO_ON; HOBO Pendant Temperature/Light 64K Data Logger; Illuminance; light intensity; Limfjorden; MULT; Multiple investigations; mussel dredging; Onset HOBO data logger; Sediment plumes; Time in hours; Tloi_01; Tloi_02; Tloi_03; Tloi_04; Tloi_05; Tloi_06; Tloi_07; Tloi_08; Tloo_09; Tloo_10; Tloo_11; Tloo_12; Tloo_13; Tloo_14; Tloo_15; Tloo_16
Type:
Dataset
Format:
text/tab-separated-values, 181503 data points
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