Light intensity time series from 16 locations in Lovns Bredning, Limfjorden, Denmark, at 1.5 m above seabed, 2-March-2017@en

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.本研究于林姆峡湾（Limfjorden）的两个不同区域开展野外调查实验，分别为洛夫斯布雷达宁湾（Lovns Bredning，2017年2月26日至3月4日）与勒格斯托布雷达宁湾（Løgstør Bredning，2017年3月6日至10日）。在每个采样区域内，研究人员于贻贝疏浚区周边布设两组圆形传感器阵列（sensor arrays），共部署16套固定式锚系设备（fixed-position moorings），以探究疏浚相关沉积物羽流（sediment plumes）可能产生的影响（Pastor等，2020）。内圈阵列（站位1至8）直径为200米，外圈阵列（站位9至16）直径设定为600米。集成式温光记录仪（HOBO Pendant Temperature/Light 64K Data Logger）被安装于两组圆形阵列的每套锚系设备上，布设位置覆盖距海底0.5米、1.5米及3.0米的三个水层。每个区域共部署48台记录仪（对应3个水层与16个站位），部署周期为4天，采集的光强时间序列数据采样间隔为30秒。洛夫斯布雷达宁湾区域有5台记录仪因技术故障未返回有效数据，其中包含2台近表层记录仪与3台布设于距海底1.5米处的记录仪。但在勒格斯托布雷达宁湾区域，仅有1台底部记录仪未返回有效数据。所有时间序列数据均采用3分钟移动平均法进行滤波处理，以剔除极端异常值，同时保留由实验性贻贝疏浚所产生的短期沉积物羽流对应的光强突变信号。