Water temperature, primary productivity-phytoplankton, chlorophyll-a concentration, and other data collected by CTD, scintillation counter, fluorometer, and other instruments from Arctic Ocean from 1959-08-03 to 2011-10-21 (NCEI Accession 0161176)

Arctic Ocean net primary productivity (NPP) was assembled for 1959-2011 from existing databases and recent polar research cruises. At each NPP station, if available, other data such as Chl-a, nitrate, and nitrite concentrations, mixed layer depth (MLD), SST, and euphotic layer depth were included. The data were obtained between 65 and 89°N mainly from late spring to early fall. At each station, NPP was measured at various depths using 13C- or 14C-labeled compounds. Surface fluorometric Chl-a concentration and SST were estimated from measurements between 0 and 5 m depth. MLD was estimated from CTD profiles using 0a threshold criterion. Nitrate and nitrite concentrations were measured only in the upper 100 m. Sponsored by the NASA through the Primary Productivity Algorithm Round Robin activity (PPARR) program. Data were provided in xlsx format and converted by NCEI to csv format.

北极洋净初级生产力（NPP）数据集自1959年至2011年，通过整合现有数据库及近期极地考察航次数据汇编而成。在每个NPP监测站点，如条件允许，还纳入了其他数据，包括叶绿素a（Chl-a）、硝酸盐和亚硝酸盐浓度、混合层深度（MLD）、海表温度（SST）以及光透层深度。数据采集范围主要介于65°N至89°N之间，时间集中在春末至秋初。在每个站点，利用13C或14C标记的化合物在多个深度测量NPP。海表叶绿素a浓度和海表温度通过0至5米深度的测量数据进行估算。混合层深度通过CTD剖面数据，采用0a阈值标准进行估算。硝酸盐和亚硝酸盐浓度仅在表层100米内进行测量。该项目由NASA通过初级生产力算法轮换活动（PPARR）项目赞助。数据以xlsx格式提供，并由NCEI转换为csv格式。