Stable isotope variations of daily precipitation from 2014-2018 in the central United States.

ABSTRACT: Stable isotopes of hydrogen and oxygen (δ²H, δ¹⁸O and δ¹⁷O) 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 (δ²H, δ¹⁸O and δ¹⁷O). Meanwhile, ¹⁷O-excess and d-excess as second-order isotopic variables were calculated to provide additional information on precipitation for

SUBMITTER: Tian C 

PROVIDER: S-EPMC6380221 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature