Isotopic composition of the atmospheric water vapor during the austral summer at Concordia Station, Dome C, East Antarctica (December 2023 – February 2024)@en

The dataset provides a 2.5-month record (December 6th 2023 – February 14th 2024) of the atmospheric water vapor isotopic composition at Concordia Station (Dome C), East Antarctica (-75.10°N, 123.35°E, 3233 m a.s.l.). The atmospheric water vapor isotopic composition is measured by two different laser spectrometers: a L2130-i analyser, manufactured by PICARRO Inc. (CRDS measurement technique) and a prototype version of the ProCeas H2O analyser, manufactured by AP2E Inc. (OF-CEAS measurement technique). The inlet of the instrumental set-up is sampling the atmosphere from 50 cm above the snow surface. The dataset provides the hourly-averaged calibrated measurements from both laser spectrometers. The datetime column is in UTC (UTC+8 for local datetime). The timestamp represents the start of the hourly-averaged period. The humidity (mixing ratio) data has been calibrated against an independent humidity measurement and is reported in ppmv. The isotope data has been calibrated for the isotope-humidity dependency and against the VSMOW-SLAP scale and is reported in delta-notation (in ‰).本数据集提供了东南极洲康科迪亚站（Dome C，坐标：-75.10°N、123.35°E，海拔3233米）2023年12月6日至2024年2月14日共计2.5个月的大气水汽同位素组成观测记录。大气水汽同位素组成的测量采用两台不同的激光光谱仪：一台为PICARRO公司生产的L2130-i分析仪，采用腔环衰荡光谱（CRDS, Cavity Ring-Down Spectroscopy）测量技术；另一台为AP2E公司生产的ProCeas H2O分析仪原型机，采用光学反馈腔增强吸收光谱（OF-CEAS, Optical Feedback Cavity-Enhanced Absorption Spectroscopy）测量技术。该仪器装置的进气口从雪面上方50厘米处采集大气样品。本数据集包含两台激光光谱仪的小时平均校准后测量数据。时间列采用协调世界时（UTC），当地时间为UTC+8，时间戳代表该小时平均时段的起始时刻。湿度（混合比）数据已通过独立湿度测量结果完成校准，以ppmv（体积百万分比浓度）为单位报告。同位素数据已针对同位素与湿度的相关性进行校准，并参照维也纳标准平均海洋水-标准极地冰一水（VSMOW-SLAP）尺度完成标定，采用δ标记法报告，单位为‰。