Primary productivity estimates from NGA-LTER research cruises in the Gulf of Alaska, 2018-2020

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.

本数据集包含采用13C-碳酸氢盐摄取法开展的24小时甲板培养实验所获取的初级生产力测量数据。采样工作于2018年启动，在阿拉斯加湾及威廉王子湾的NGA-LTER科考航次的春、夏、秋三季开展。2020年春季的采样受新冠疫情防控限制未能实施。稳定同位素富集度分析及配套的颗粒有机碳（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（UC-Davis Stable Isotope Facility, SIF）完成。每份航次数据附带两份数据表：其一为深度特异性初级生产力计算结果，该计算基于参照光合有效辐射（Photosynthetically Active Radiation, PAR）剖面设置的6个表层辐照度分级光强（即1、0.5、0.3、0.1、0.05及0.01）；其二为积分初级生产力计算结果。数据集同时涵盖深度特异性叶绿素数据与积分叶绿素数据。为便于长期保存，原始Excel电子表格已转换为CSV格式文件。