CTD, chlorophyll a and macronutrient concentrations during the icebreaker Shirase cruise of the 64th Japanese Antarctic Research Expedition

This dataset contains various sensor data mounted the CTD (conductivity, temperature and depth) and the underway monitoring system, chlorophyll (Chl) a and macronutrient (nitrate, nitrite, phosphate and silicic acid) concentrations during the Icebreaker Shirase cruise in the 2022/23 season as part of he monitoring program of the Japanese Antarctic Research Expedition (JARE). Water samples were collected from the underway seawater supply twice a day and at multiple depths from select CTD rosette deployments attached with dissolved oxygen, pH, chlorophyll/turbidity and PAR (Photosynthetically Active Radiation) sensors at 9 stations along 110 degree east in December and March. Chl. a and macronutrients (nitrate, nitrite, phosphate and silicic acid) concentrations were quality controled. PAR was also measured continuously by a sensor mounted on the bridge of the ship.本数据集收录了2022/23年度"白濑号"破冰船航次的各类传感器数据，该航次作为日本南极考察队（Japanese Antarctic Research Expedition, JARE）监测计划的组成部分。采集数据涵盖搭载于电导率-温度-深度仪（CTD，Conductivity, Temperature and Depth）与走航监测系统的相关数据，以及叶绿素a（Chl a）和大量营养盐（硝酸盐、亚硝酸盐、磷酸盐与硅酸）的浓度数据。本次科考于12月及3月间，在东经110°沿线的9个站位开展工作：每日两次通过走航海水供水系统采集水样，并在选定的CTD采水器布放作业中于多个深度采集水样，该采水器搭载有溶解氧、pH、叶绿素/浊度及光合有效辐射（PAR，Photosynthetically Active Radiation）传感器开展同步监测。叶绿素a与大量营养盐（硝酸盐、亚硝酸盐、磷酸盐与硅酸）浓度已完成质量控制，此外船舶桥楼搭载的传感器可连续采集光合有效辐射数据。