Arctic Makarov Basin : IAOOS14, IAOOS15 and IAOOS25 ocean CTD-DO profiles in 2015 and 2017

iaoos14, iaoos15 and iaoos25 were deployed from the korean icebreaker r/v araon during cruises in the northern chukchi sea. iaoos14 and iaoos15 were deployed 300 m apart on the same floe on 12 august 2015 in the makarov basin (80.8°n;173°e) and they drifted together remaining always less than 6 km apart. iaoos25 was deployed on 15 august 2017 south-west mendeleev ridge (77.7°n;180°e) and drifted westward to the continental slope of the east siberian sea. iaoos14 and iaoos25 stopped transmitting on 9 october 2015 and 19 november 2017 respectively, likely due to the loss of their profilers while crossing relatively shallow bathymetry. iaoos15 dataset ends in 15 october 2015. ocean profilers were provor spi (from french manufacturer nke) equipped with a seabird sbe41 ctd (conductivity, temperature, depth) and a dissolved oxygen (do) aandera 4330 optode. the profilers were set to perform two upward profiles a day from 800 m (iaoos 14), 300 m (iaoos 15) and 420 m (iaoos 25), upward starting at approximately 6 am and 6 pm. the present dataset is composed of ctd-do data from iaoos 14 and 15, and ctd data from iaoos 25 in the makarov basin, corrected from salinity errors and interpolated vertically every 0.5 m.

iaoos14、iaoos15及iaoos25系于韩国破冰船R/V Araon执行北极楚科奇海巡航任务期间部署。iaoos14与iaoos15于2015年8月12日于马卡罗夫盆地（北纬80.8°；东经173°）同一浮冰上相距300米部署，并始终保持小于6公里的距离共同漂流。iaoos25于2017年8月15日部署于西南门捷列耶夫脊（北纬77.7°；东经180°）并向西漂流至东西伯利亚海大陆坡。iaoos14和iaoos25分别于2015年10月9日和2017年11月19日停止传输，推测原因是在穿越相对浅的海底地形时失去了其剖面仪。iaoos15数据集于2015年10月15日结束。海剖面仪为法国制造商NKE提供的Provor spi，配备有Seabird SBE41 CTD（电导率、温度、深度）和溶解氧（DO）Aandera 4330光极。剖面仪被设置为每天进行两次向上剖面测量，从800米（iaoos 14）、300米（iaoos 15）和420米（iaoos 25）开始，分别在上午约6点和下午6点。本数据集由iaoos 14和iaoos 15的CTD-DO数据以及iaoos 25在马卡罗夫盆地的CTD数据组成，已校正盐度误差，并在垂直方向上以0.5米为间隔进行插值。