Primary production estimates from 14C uptake (in situ), determined by the incorporation of inorganic carbon into particulate organic carbon (POC) due to photosynthesis at selected light levels from CCE LTER process cruises in the California Current System, 2006 - 2016 (ongoing).

Primary productivity samples of seawater are taken each day shortly before noon on the CTD rosette up-cast during the CCE Process crusies (since 2006, ongoing). Light penetration below the surface is estimated from the Secchi disk depth. Niskin bottles from depths with ambient light intensities corresponding to light levels simulated by on-deck incubators are identified and sampled. Primary production is estimated from 14C uptake using this simulated in situ technique (followed by filtering) by which the assimilation of dissolved inorganic carbon by phytoplankton yields a measure (in µg/L/day) of the rate of photosynthetic primary production (particulate organic carbon, POC) at selected light levels in the euphotic zone within the CCE study area.本数据集的海水初级生产样品采集自CCE过程航次（CCE Process cruises），于每日正午前短时间内，通过CTD采水器架（CTD rosette）的上行剖面完成采样，该航次自2006年起持续开展。表层以下的光穿透深度通过塞氏盘（Secchi disk）透明度测定值估算。选取与甲板培养箱模拟光照强度匹配的深度处的尼斯金采水瓶（Niskin bottles）进行识别与采样。本研究采用模拟原位技术（后续辅以过滤步骤），基于14C摄取（14C uptake）量估算初级生产速率：浮游植物（phytoplankton）对溶解无机碳（dissolved inorganic carbon）的同化作用，可量化CCE研究区真光层（euphotic zone）内选定光照水平下的光合初级生产（颗粒有机碳，POC）速率，单位为微克每升每日（µg/L/day）。