A global database of water vapor isotopes measured with high temporal resolution infrared laser spectroscopy

Zhongwang Wei, Xuhui Lee, Franziska Aemisegger, Marion Benetti, Max Berkelhammer, Mathieu Casado, Kelly Caylor, Emanuel Christner, Christoph Dyroff, Omaira García, Yenny González, Timothy Griffis, Naoyuki Kurita, Jie Liang, Mao Chang Liang, Guanghui Lin, David Noone, Konstantin Gribanov, Niels C. Munksgaard, Matthias SchneiderFrançois Ritter, Hans Christian Steen-Larsen, Christine Vallet-Coulomb, Xuefa Wen, Jonathon S. Wright, Wei Xiao, Kei Yoshimura

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The isotopic composition of water vapour provides integrated perspectives on the hydrological histories of air masses and has been widely used for tracing physical processes in hydrological and climatic studies. Over the last two decades, the infrared laser spectroscopy technique has been used to measure the isotopic composition of water vapour near the Earth’s surface. Here, we have assembled a global database of high temporal resolution stable water vapour isotope ratios (δ18O and δD) observed using this measurement technique. As of March 2018, the database includes data collected at 35 sites in 15 Köppen climate zones from the years 2004 to 2017. The key variables in each dataset are hourly values of δ18O and δD in atmospheric water vapour. To support interpretation of the isotopologue data, synchronized time series of standard meteorological variables from in situ observations and ERA5 reanalyses are also provided. This database is intended to serve as a centralized platform allowing researchers to share their vapour isotope datasets, thus facilitating investigations that transcend disciplinary and geographic boundaries.

Original languageEnglish
Article number180302
Pages (from-to)1-16
Number of pages16
JournalScientific Data
Publication statusPublished - 22 Jan 2019


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