Aerosol concentration and size distribution (0.25-32µm) measured with an optical particle counter during the Tara Pacific Expedition 2016-2018

The Tara Pacific expedition (2016-2018) sampled coral ecosystems around 32 islands in the Pacific Ocean, and sampled the surface of oceanic waters at 249 locations, resulting in the collection of nearly 58,000 samples. The expedition was designed to systematically study corals, fish, plankton, and seawater, and included the collection of samples for advanced biogeochemical, molecular, and imaging analysis. Here we provide the continuous dataset originating from an optical particle counter ([EDM]; EDM180 GRIMM Aerosol Technik Ainring GmbH & Co. KG, Ainring, Germany) instrument acquiring continuously during the full course of the campaign. Aerosols pumped through one of the ([MAST-PUMP]) inlets were channeled through a conductive tubing of 1.9 cm inner diameter to four parallel 47mm filter holders installed in the rear hold using a vacuum pump (Diaphragm pumpME16 NT, VACUUBRAND BmbH & Co KG, Wertheim, Germany) at a minimum flow rate of 30 lpm (20lpm prior to may 2016). Air was conducted to an optical particle counter ([EDM]; EDM180 GRIMM Aerosol Technik Ainring GmbH & Co. KG, Ainring, Germany) measuring and counting particles in the size range 0.25 - 32 µm every 60 seconds.塔拉太平洋科考航次（2016-2018年）对太平洋海域32座岛屿周边的珊瑚生态系统开展采样，并在249个站位采集海洋表层海水样本，最终累计收集近58000份样品。 本航次旨在系统研究珊瑚、鱼类、浮游生物与海水环境，同时采集样本用于先进生物地球化学、分子生物学及成像分析。 本数据集收录了航次全周期内由光学粒子计数器（Optical Particle Counter）持续采集的连续观测数据，该仪器代号为[EDM]，型号为EDM180，生产商为德国艾林市GRIMM Aerosol Technik Ainring GmbH & Co. KG。 通过[MAST-PUMP]采样口之一抽取的气溶胶，经内径1.9 cm的导电管路，由真空泵（隔膜泵ME16 NT，德国威特海姆市VACUUBRAND BmbH & Co KG）以最低30升/分钟的流量输送（2016年5月前流量为20升/分钟），被导送至安装于船尾舱室的4个平行配置的47mm滤膜支架。 随后空气被导入上述光学粒子计数器（代号[EDM]），该设备可每60秒对粒径范围0.25~32 μm的颗粒物完成测量与计数。