. Author manuscript; available in PMC: 2020 Jul 13.

Published in final edited form as: Rev Geophys. 2016 Aug 22;54(4):809–865. doi: 10.1002/2015rg000512

Table 2.

The molecular diffusivities in air of the heavy isotopologues $(^{1} H_{2}^{17} O,^{1} H_{2}^{18} O,^{1} H^{2} H^{16} O)$ compared to the light isotopologues $(^{1} H_{2}^{16} O)$

D[HDO]/D[H₂O]	0.9755 [Merlivat, 1978] 0.9839 [Cappa et al., 2003]
D[H₂¹⁷O]/D[H₂O]	0.9856 [Barkan and Luz, 2007]
D[H₂¹⁸O]/D[H₂O]	0.9723 [Merlivat, 1978] 0.9691 [Cappa et al., 2003] 0.9725 [Barkan and Luz, 2007]