© 2019 Elsevier B.V. The author regrets that in the above article the introduction sentence includes incorrect information. The correct text follows. Consequently, analyses using Δ17O(NO3−) values have been used for quantifying the fate of nitrate in forest ecosystems (Tsunogai et al., 2010; Tsunogai et al., 2011; Tsunogai et al., 2014; Costa et al., 2011; Sebestyen et al., 2019); most of such studies have focused only on stream water and not acknowledged the importance of a range of samples from inputs to outputs with horizontal soil water samples as well as groundwater and stream water. Recently, Nakagawa et al. (2018) found that the stable oxygen isotopic compositions of nitrate in the soil water showed large seasonal variation with the maximum occurring in winter and minimum in summer. As described above, snow accumulation and its melting influence NO3− deposition and its export flux to the catchment. Thus, the fate of NO3− and related microbial activities such as nitrification and denitrification may also seasonally change owing to seasonal changes in the influence of snow accumulation and melting. In addition, the fate of NO3− and related microbial activities may vary at different soil depths and be seasonally dependent. Reference: Nakagawa, F., Tsunogai, U., Obata, Y., Ando, K., Yamashita, N., Saito, T., Uchiyama, S., Morohashi, M., and Sase, H., Export flux of unprocessed atmospheric nitrate from temperate forested catchments: a possible new index for nitrogen saturation. Biogeosciences. 15. 7025–7042. https://doi.org/10.5194/bg-15-7025-2018. (2018).