Stable oxgen isotope ratio of seawaters off Cape Darnley by rosette-multi-water sampler during 2011-2020

Hydrographical observations were conducted during the Icebreaker Shirase to describe the oceanic watermass properties off Cape Darnley, East Antarctica. Conductivity, Temperature, and Depth (CTD)/ Rosette Multi-Sampler (RMS) observations were completed during February 2001 to February 2020. SBE19/SBE55 ECO Water Sampler system of Sea-Bird Electronics, Inc. was used. After transporting the water samples to laboratory, stable oxygen isotope ratio, reference to VSMOW2, was measured by Isoprime (Elementar, U.K.) at Institute of Low Temperature Science, Hokkaido University.本研究在白濑号破冰船的科考航行期间开展海洋水文观测，以阐明南极东部达恩利角周边海域的海水团特性。观测采用温盐深仪（Conductivity, Temperature, and Depth, CTD）/多联采水器（Rosette Multi-Sampler, RMS）系统，观测时段为2001年2月至2020年2月。所用设备为海鸟电子股份有限公司（Sea-Bird Electronics, Inc.）生产的SBE19/SBE55 ECO采水系统。将采集的水样运送至实验室后，以维也纳标准平均海水2（VSMOW2）为参考标准，依托北海道大学低温科学研究所（Institute of Low Temperature Science, Hokkaido University），使用英国Elementar公司生产的Isoprime仪器完成了水样稳定氧同位素比值的测定。