Table 1 The reported values of δ2H, δ18O and δ17O and the calculated mass-dependent fractionation coefficient (hereafter θ, θ=ln (δ17O+1)/ln (δ18O+1)), and 17O-excess for the five LGR working standards.

From: Stable isotope variations of daily precipitation from 2014–2018 in the central United States

Working Standard

δ2H (‰)

δ18O (‰)

δ17O (‰)

θ

17O-excess (per meg)

LGR #1VSMOW

−154.0

−19.49

−10.30

0.5260

39

LGR #2VSMOW

−123.7

−16.24

−8.56

0.5251

48

LGR #3VSMOW

−97.3

−13.39

−7.06

0.5256

33

LGR #4VSMOW

−51.6

−7.94

−4.17

0.5242

30

LGR #5VSMOW

−9.2

−2.69

−1.39

0.5164

31

SLAPVSMOW-SLAP

−427.5a

−55.5a

−29.6986b

0.5280

0b

  1. The reported δ2H and δ18O values from IAEA (International Atomic Energy Agency), and literature δ17O and 17O-excess values as well as the calculated θ for SLAP.
  2. Noting: a was from IAEA37; b was from Schoenemann et al.27; Los Gatos Research Inc. (LGR); Vienna Standard Mean Ocean Water (VSMOW); Standard Light Antarctic Precipitation (SLAP).
Back to article page