文章基本信息

标题：Stable isotope variations of daily precipitation from 2014-2018 in the central United States
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作者：Chao Tian ; Lixin Wang
期刊名称：Scientific Data
电子版ISSN：2052-4463
出版年度：2019
卷号：6
DOI：10.1038/sdata.2019.18
语种：English
出版社：Nature Publishing Group
摘要：Stable isotopes of hydrogen and oxygen (未2H, 未18O and 未17O) serve as powerful tracers in hydrological investigations. To our knowledge, daily precipitation isotope record especially 17O-excess is rare in the mid-latitudes. To fill such knowledge gap, daily precipitation samples (n=446) were collected from June 2014 to May 2018 in Indianapolis, Indiana, U.S. A Triple Water Vapor Isotope Analyzer (T-WVIA) based on Off-Axis Integrated Cavity Output Spectroscopy (OA-ICOS) technique was used to concurrently measure precipitation isotopic variations (未2H, 未18O and 未17O). Meanwhile, 17O-excess and d-excess as second-order isotopic variables were calculated to provide additional information on precipitation formation and transport mechanisms. This study presents a four-year daily precipitation isotope dataset for mid-latitudes, and makes it available to researchers around the world who may use it as a reference for site comparisons and for assessing global hydrological models.