Mesozooplankton size data from Disko Bay, West Greenland, 2008@en

The study site was located in the Disko Bay off Qeqertarsuaq, western Greenland. Due to land-connected sea ice coverage during winter, 2 sampling sites were combined. At the first site in winter (21 February to 23 March 2008), sampling was conducted through a hole in the ice at ca. 65 to 160 m depth approximately 0.5 nautical mile (n mile) south of Qeqertarsuaq (69° 14' N, 53° 29' W). In spring and summer (9 April to 18 July), sampling was done at a monitoring station 1 n mile south from Qeqertarsuaq (69° 14' N, 53° 23' W) at 300 m depth. Sampling was carried out between 10:00 and 17:00 h. During sampling from the ice, mesozooplankton was collected using a modified WP-2 net (45 µm) equipped with a closing mechanism (Hydrobios). Samples were collected in 3 depth strata (0-50, 50-100, and 100-150 m). During ship-based sampling, mesozooplankton was collected with a multinet (50 µm) equipped with a flow meter (Multinet, Hydrobios type midi), and 2 additional depth strata (150-200m and 200-250 m) were included. In addition to the seasonal study one diurnal investigation with sampling every 6 h was conducted from 29 April at 12:00 h to 30 April 30 at 12:00 h. Samples were immediately preserved in buffered formalin (5% final concentration) for later analyses. Biomass values of the different copepod species were calculated based on measurements of prosome length, and length/weight relationships. Two regressions for Calanus spp. were established for biomass calculations: one applicable prior to and during the phytoplankton bloom until 4 May, and another from 9 May onwards.研究区域位于格陵兰西部凯凯塔苏瓦克（Qeqertarsuaq）附近的迪斯科湾（Disko Bay）。由于冬季存在与陆地相连的海冰覆盖，两个采样点位被合并。2008年2月21日至3月23日的冬季采样期间，采样工作通过冰面钻孔完成，采样点位位于凯凯塔苏瓦克以南约0.5海里（n mile）处，水深约65~160米，坐标为69°14′N、53°29′W。春夏季采样时段为4月9日至7月18日，采样工作在凯凯塔苏瓦克以南1海里处的监测站位开展，水深300米，坐标为69°14′N、53°23′W。采样时段为每日10:00至17:00。冰上采样阶段，采用配备封闭装置的改装WP-2网（孔径45μm，Hydrobios出品）采集中型浮游动物（mesozooplankton），采样设置3个水层：0~50米、50~100米及100~150米。船基采样期间，采用搭载流量计的Hydrobios midi型多网采样器（孔径50μm）采集中型浮游动物，新增2个采样水层：150~200米与200~250米。除季节性采样外，本次研究还开展了一次昼夜连续采样调查，采样间隔为6小时，时段为4月29日12:00至4月30日12:00。采集的样品立即用缓冲福尔马林溶液（终浓度5%）固定，以备后续分析。不同桡足类（copepod）物种的生物量，均基于其体躯长度（prosome length）与体长-体重关系计算得到。针对哲水蚤属（Calanus spp.）的生物量计算，共建立了两组回归方程：一组适用于5月4日之前及浮游植物水华（phytoplankton bloom）期间的样本，另一组适用于5月9日及之后的样本。