Environmental context of all samples from the Tara Oceans Expedition (2009-2013), about nutrients in the targeted environmental feature

The Tara Oceans Expedition (2009-2013) sampled the world oceans on board a 36 m long schooner, collecting environmental data and organisms from viruses to planktonic metazoans for later analyses using modern sequencing and state-of-the-art imaging technologies. Tara Oceans Data are particularly suited to study the genetic, morphological and functional diversity of plankton. The present data set provides environmental context to all samples from the Tara Oceans Expedition (2009-2013), about nutrient concentrations in the targeted environmental feature. Concentrations of nitrite, nitrite+nitrate, phosphate and silicate were determined by ... methods. For each parameter we provide six statistics about all observations that are considered adequate to characterise the targeted environmental feature: number of observations, minimum, first quartile (25 percentile), median, third quartile (75 percentile), and maximum values. Observations were considered adequate if they met the following criteria: <100 km from the sampling location, <2 days from the sampling date/time, and within 10 m of the sampling depth. We also provide the computed distance and date/time lags that were assessed against these criteria. No environmental context is provided when one of these criteria was not met.塔拉海洋科考航次（Tara Oceans Expedition，2009-2013）依托一艘长36米的纵帆船对全球海洋开展系统采样，收集了涵盖病毒至浮游后生动物在内的各类生物与环境数据，以供后续借助现代测序技术与前沿成像手段开展分析。塔拉海洋数据集尤其适用于研究浮游生物的遗传、形态与功能多样性。本次数据集为塔拉海洋科考航次（2009-2013）的全部采样样本提供了对应目标环境特征下营养盐浓度的环境背景信息，其中亚硝酸盐、亚硝酸盐+硝酸盐、磷酸盐与硅酸盐的浓度通过[...]方法测定。针对每一项参数，我们提供了所有符合表征目标环境特征要求的观测数据的六项统计量：观测样本量、最小值、第一四分位数（first quartile，25百分位数）、中位数、第三四分位数（third quartile，75百分位数）以及最大值。当观测数据满足以下全部条件时，即被视为符合表征要求：与采样地点的距离小于100公里、与采样日期/时间的间隔小于2天，且采样深度偏差在10米以内。我们同时提供了基于上述标准计算得到的距离与日期/时间滞后量。若观测数据未满足上述任一标准，则不提供对应的环境背景信息。