Primary productivity estimates from NGA-LTER research cruises in the Gulf of Alaska, 2018-2023

This dataset consists of primary production measurements conducted during 24-h deckboard incubations using uptake of 13C-bicarbonate. Sampling occurred on NGA-LTER research cruises in the Gulf of Alaska and Prince William Sound during spring, summer and fall, starting in 2018. COVID limitations prevented spring 2020 sampling. Stable isotope enrichment and associated POC determinations were done at the UC-Davis Stable Isotope Facility (SIF). For each cruise, there are two data sheets included: 1. calculation of depth specific primary productivity (based on 6 fractional light levels of the surface irradiance with reference to the PAR profile: 1, 0.5, 0.3, 0.1, 0.05 and 0.01), and 2. calculation of the integrated primary productivity. Depth specific and integrated chlorophyll data is included. Excel spreadsheets were converted to CSV files for preservation.本数据集包含通过13C-碳酸氢盐（13C-bicarbonate）摄取法开展的24小时甲板培养实验所得到的初级生产力测定数据。采样工作始于2018年，在阿拉斯加湾与威廉王子湾的NGA-LTER研究航次中进行，覆盖春季、夏季与秋季三个季度。2020年春季的采样受新冠疫情限制未能开展。稳定同位素富集度及相关颗粒有机碳（Particulate Organic Carbon, POC）测定工作均在加州大学戴维斯分校稳定同位素实验室（Stable Isotope Facility, SIF）完成。每个航次附带两份数据表：其一为逐深度初级生产力计算结果（基于参照光合有效辐射（Photosynthetically Active Radiation, PAR）剖面设置的6级表层辐照度梯度，分别为1、0.5、0.3、0.1、0.05与0.01）；其二为集成初级生产力计算结果。数据集同步包含逐深度与集成叶绿素数据。为实现长期保存，原Excel电子表格已转换为CSV格式文件。