Arctic Western Eurasian Basin: IAOOS 23 physical and biogeochemical profiles in 2017

in april 2017, two ice atmosphere arctic ocean observing system platforms (iaoos 23 and iaoos 24) were deployed near the north pole. over the next 8 months, they meandered southwards with the ice in the transpolar drift, collecting measurements in the upper 250 m of amundsen basin, nansen basin and fram strait. the ocean profilers are provor spi (from french manufacturer nke), which includes a seabird sbe41 ctd (conductivity, temperature, depth) and a dissolved oxygen (do) aandera 4330 optode. iaoos 23 also featured a bio-optics sensor suite and a submersible ultraviolet nitrate analyzer (suna, satlantic-seabird inc.). the bio-optics sensor suite (called pack rem a) combines a three-optical-sensor instrument (eco triplet, wet labs inc.) and a multispectral radiometer (ocr-504, satlantic inc.). the present dataset is composed of chlorophyll-a fluorescence, backscatter, irradiances (at 412, 490 and 555 nm), photosynthetically active radiation (par), nitrate and colored-dissolved organic matter data from the iaoos 23 platform, as well as composites of absolute salinity, conservative temperature and apparent oxygen utilization data from both profilers. the profilers were set to perform two upward profiles a day from 250 m starting at approximately 6 am and 6 pm. in this dataset, chlorophyll-a, par and irradiances were corrected with a shift to set dark values to zero. nitrate was interpolated vertically every 5 m, and all other parameters were interpolated vertically every 0.5 m.

于2017年4月，两套冰大气北极海洋观测系统平台（IAOOS 23和IAOOS 24）被部署于北极附近。随后的8个月里，它们随冰层的跨极漂流向南漂移，在阿蒙森盆地、纳斯盆地和弗兰海峡的上层250米范围内收集数据。这些海洋剖面仪为法国制造商NKE生产的Provor SPI型，包括一款海鸟SBE41 CTD（电导率、温度、深度）和一款溶解氧（DO）Aandera 4330光极。IAOOS 23还配备了生物光学传感器套装和一款潜水紫外硝酸盐分析仪（SUNA，Satlantic-Seabird Inc.）。生物光学传感器套装（称为Pack Rem A）由一款三光传感器仪器（Eco Triplet，Wet Labs Inc.）和一款多光谱辐射计（OCR-504，Satlantic Inc.）组成。本数据集由IAOOS 23平台采集的叶绿素a荧光、后向散射、辐照度（在412、490和555纳米处）、光合有效辐射（PAR）、硝酸盐和有色溶解有机物数据组成，以及来自两台剖面仪的绝对盐度、保守温度和表观氧利用率的合成数据。剖面仪被设置为每天从250米深度进行两次向上剖面测量，分别在大约上午6点和下午6点开始。在本数据集中，叶绿素a、PAR和辐照度经过调整，将暗值设为零进行校正。硝酸盐数据每5米垂直插值一次，而其他所有参数则每0.5米垂直插值一次。