Thule, Greenland, water vapor isotopes (δ18O, δ2H, d-excess) and meteorological data, August 2017 - August 2019

This dataset contains quality checked and calibrated water vapor isotopic ratios for oxygen (δ18O) and hydrogen (δ2H), as well as the secondary isotopic variable of deuterium-excess. The data were taken at Thule Air Base, Greenland, between August 2017 and August 2019, using a Picarro L-2130i cavity ring-down spectroscopy isotope analyzer with Standards Delivery Module. Data here have been calibrated for machine accuracy and precision errors related to changing humidity values. Original measurements are made approximately 1 per second, and later aggregated into 10 minute, hourly, and daily means. Meteorological observations made at the SMT site of Thule Air Base and THU airport are also included here at 10 minute, hourly, and daily means. Full SMT meteorological data available at https://doi.org/10.1594/PANGAEA.895059. These data were collected to better understand the environmental controls on water isotopic variability in the High Arctic, including sea ice extent, synoptic moisture transport, and mesoscale winds. Thule is also part of the Arctic Water Isotope Network, a group of nine sites located around the Arctic Basin that measure water vapor isotopes in real time to track changes in the Pan-Arctic hydroclimate.

本数据集包含经质量核查与校准的水汽同位素比值数据，涵盖氧同位素(δ¹⁸O)与氢同位素(δ²H)，以及次级同位素变量氘盈余。数据采集时段为2017年8月至2019年8月，观测地点为格陵兰图勒空军基地，所用设备为搭载标准输送模块的Picarro L-2130i型腔环衰荡光谱同位素分析仪。本数据集已针对湿度变化引发的仪器准确度与精密度误差完成校准。原始观测的采样频率约为每秒1次，后续被整合为10分钟、小时及日均值序列。此外，本数据集还包含取自图勒空军基地SMT站点与图勒机场的气象观测数据，同样被整合为10分钟、小时及日均值序列。SMT站点完整气象数据集可通过链接https://doi.org/10.1594/PANGAEA.895059获取。本次数据采集旨在深化对高北极地区水汽同位素变异环境控制机制的认知，涉及海冰范围、天气尺度水汽输送及中尺度风场等要素。图勒空军基地同时隶属于北极水汽同位素网络，该网络由环绕北极海盆的9个观测站点组成，可实时监测水汽同位素组成，以追踪泛北极水文气候的动态变化。