Physical oceanography, picoplankton biomass, chlorophyll a and nutrients during RV Atlantic Explorer cruise ESTELA@en

Data were collected from 9 to 12 of May of 2011 on board RV Atlantic Explorer from a section across a wind-shear convergent front south of Gran Canaria Island (Canary Island). In order to assess both spatial and temporal variability at submesoscale range, a section consisting in 6-7 oceanographic stations, separated ~4 km (25 km in total), was entirely sampled every 24 h, during a 96 h period (there are no data for 72h). At each station CTD data and discrete water samples were collected for chlorophyll a, nutrients and picophytoplankton abundances at six levels, from surface to 150 m, including the deep chlorophyll maximum (DCM) by means of CTD mounted onto an oceanographic rosette implemented with six Niskin bottles of 12 L.本数据集采集于2011年5月9日至12日，搭载于“大西洋探索者号”（RV Atlantic Explorer）研究船，作业区域位于大加那利岛（加那利群岛）以南的风切变辐聚锋面断面。为评估亚中尺度（submesoscale）范围内的空间与时间变异性，本次科考设置了由6至7个海洋学观测站位组成的断面，站位间距约4 km，总长度约25 km；在96小时的观测周期内，每24小时完成一次全断面采样（72小时时段无有效数据）。在每个观测站位，通过搭载6个12升尼斯金采水瓶（Niskin bottles）的海洋学采水架配套的温盐深剖面仪（Conductivity Temperature Depth, CTD），从表层至150米深度的6个水层采集离散水样，涵盖叶绿素a最大层（deep chlorophyll maximum, DCM），同时获取对应CTD数据，用于后续叶绿素a、营养盐及超微型浮游植物丰度的测定。