Data Report helium isotopes and neon: Baltic GasEx (2018)

3He/SF6 dual‐gas tracer injections were conducted in the southern Baltic Sea between June 06, 2018, and June 11, 2015 aboard the research vessel Alkor (AL510). SF6 was surveyed using a new, fully automated, high-resolution SF6 underway sampling and analysis system described in detail by Ho et al. (2002). For helium isotopes analysis, a total of 145 seawater samples were collected from 23 hydrographic stations aboard the Alkor (AL510), with each sample being secured in 40 ml copper tubes sealed by stainless steel pinch-off clamps. He isotope measurements were conducted in the Noble Gas Laboratory of the Lamont-Doherty Earth Observatory on a dedicated, fully automated VG5400 mass spectrometer following the procedures described by Ludin et al. (1998). Shipboard sampling was done by Tobias (Toby) Koffman. Helium extraction work and isotopic analysis by T. Koffman; data processing by P. Schlosser.2015年6月11日至2018年6月6日期间，研究船Alkor（AL510）于波罗的海南部开展了氦-3（³He）与六氟化硫（SF₆）双气体示踪剂投放作业。六氟化硫（SF₆）的观测采用了Ho等人（2002）详细阐述的新型全自动高分辨率走航式六氟化硫采样与分析系统。针对氦同位素分析，研究团队在Alkor（AL510）船上的23个水文站位共采集145份海水样本，每份样本均封装于40毫升铜管中，并采用不锈钢夹紧密封钳进行密封。氦同位素测量工作在拉蒙特-多尔蒂地球观测站的稀有气体实验室（Noble Gas Laboratory）完成，使用专用的全自动VG5400型质谱仪，遵循Ludin等人（1998）描述的实验流程开展。本次走航采样工作由Tobias（Toby）Koffman完成；氦气提取与同位素分析工作亦由T. Koffman负责，数据处理则由P. Schlosser完成。