Surface water stable isotopes (¹⁸O and D) and salinity in the Canadian Arctic Archipelago in the summer of 2019

This data contains 63 geolocated water stable isotopes and salinity measurements from the surface of the ocean along the RV Oden cruise track. Surface seawater sampling was conducted using bucket sampling. This was done by throwing a weighted bucket offboard to sample the surface of the ocean every six (6) hours. Chosen times were 5:00, 11:00, 17:00, and 23:00. Multiple readings of sea surface salinity were recorded using a YSI professional series digital probe per sampling Water samples were transferred to a 30-mL Nalgene bottles that were filled to the brim. Bottles were tightly closed, sealed with parafilm, and placed inside sampling bags. Two samples were collected per sampling point, and all measurements were geolocated. A total of 126 samples were collected from 19 July – 04 August 2019. All water samples were transported to the Atmosphere, Climate, and Ecosystems lab at the University of Illinois at Chicago for processing. The δ¹⁸O and dD were measured using a Picarro l2130-I CRDS water isotope analyzer with a wire mesh inserted in the vaporizer inlet to trap salt from the seawater. Fifteen injections were made for each sample and necessary corrections to address 'memory effect' were employed. Measurements were normalized using the dD and δ¹⁸O values of internal water standards. Data table header includes the event, latitude, longitude, sampling date, campaign, sampling method, location, isotope analyzer model, salinity sensor, ¹⁸O values (‰), D values (‰), and salinity values (psu).

本数据集包含沿'奥登号'(RV Oden)科考船航迹采集的63组带地理定位的表层海水稳定同位素及盐度测量数据。表层海水采样采用桶式采样法：每6小时向船外投放一个加重水桶采集表层海水，采样时间点为5:00、11:00、17:00和23:00。每次采样使用YSI专业系列数字探头记录多组表层海水盐度读数；水样转移至30毫升Nalgene瓶中并装满至瓶口，密封后用石蜡膜包裹，放入采样袋保存。每个采样点采集两份样本，所有测量数据均附带地理定位信息。2019年7月19日至8月4日期间共采集126份样本，全部送至芝加哥伊利诺伊大学大气、气候与生态系统实验室处理。δ¹⁸O和dD值通过Picarro l2130-I CRDS水同位素分析仪测量（蒸发器入口处插入金属丝网以捕获海水中的盐分）；每个样本进行15次进样，并采用校正方法消除记忆效应（memory effect），测量结果通过内部水标准品进行标准化。数据表格表头包含以下字段：事件、纬度、经度、采样日期、考察活动、采样方法、位置、同位素分析仪型号、盐度传感器、¹⁸O值（‰）、D值（‰）及盐度值（psu）。