| Summary: | This dataset contains quality checked and calibrated water vapor isotopic ratios for oxygen (δ18O) and hydrogen (δD), 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 means. 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.
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