Arctic Western Eurasian Basin: IAOOS 23 and IAOOS 24 ocean CTD-DO, CDOM and nitrate profiles in 2017

the two platforms iaoos 23 and iaoos 24 were deployed within 600 m from each other at the north pole from the russia-operated barneo ice camp on april 12, 2017. they followed a meandering trajectory, reaching as far as 30°e in the nansen basin, before turning back to the western fram strait. on both iaoos 23 and 24, the ocean profiler was a provor spi (from french manufacturer nke) equipped with a seabird sbe41 ctd (conductivity, temperature, depth) and a dissolved oxygen (do) aandera 4330 optode. for the first time, the profiler on iaoos 23 also carried biogeochemical sensors. it 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 ctd-do data from iaoos 23 and 24, corrected from the thermal lag and the sensor lag, despiked and interpolated vertically every 0.5 m. it also comprises nitrate concentrations from the suna and cdom fluorescence from the wetlabs eco sensor on iaoos 23. other biogeochemical data will be added to this dataset. the profilers were set to perform two upward profiles a day from 250 m (iaoos 23) and 350 m (iaoos 24) upward starting at approximately 6 am and 6 pm. they provided a unique 8-month long dataset, gathering a total of 793 profiles of the temperature, salinity and oxygen (upper 350m) and 427 profiles of cdom and nitrates concentrations (upper 250m).

于2017年4月12日，在俄罗斯运营的巴伦支冰站附近北极地区，两个平台IAOOS 23和IAOOS 24被部署于彼此相距600米的距离。它们沿蜿蜒轨迹行进，直至抵达恩森海盆的东经30°，随后折返至西部弗拉姆海峡。在IAOOS 23和IAOOS 24平台上，海洋剖面仪为法国制造商NKE生产的Provor SPI型（配备Sea-Bird SBE41 CTD（电导率、温度、深度）和溶解氧（DO）Aandera 4330光极）。首次，IAOOS 23的剖面仪还搭载了生物地球化学传感器，其特色为生物光学传感器套装和潜水紫外硝酸分析仪（SUNA，Satlantic-Sea-Bird Inc.）。生物光学传感器套装（称为Pack REM A）由Wet Labs Inc.生产的三个光学传感器仪器（Eco Triplet）和Satlantic Inc.的多光谱辐射计（OCR-504）组成。本数据集由IAOOS 23和IAOOS 24的CTD-DO数据构成，已校正热滞后和传感器滞后，去噪并垂直每0.5米进行插值。此外，还包括SUNA的硝酸浓度和Wetlabs Eco传感器在IAOOS 23上的CDOM荧光数据。其他生物地球化学数据将陆续添加至本数据集中。剖面仪被设置为每天从早上大约6点和下午6点开始，每天向上进行两次250米（IAOOS 23）和350米（IAOOS 24）的剖面测量。它们提供了一项独特的8个月长期数据集，收集了总计793个温度、盐度和氧气（上层350米）的剖面，以及427个CDOM和硝酸浓度（上层250米）的剖面。