EGU23-11452, updated on 26 Feb 2023
EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Stable isotope ratios (δ2H, δ18O and δ17O) of precipitation in Seoul, Korea, during 2016-2020

Songyi Kim1,2, Yeongcheol Han1, Jangil Moon1, Yalalt Nyamgerel2, and Jeonghoon Lee2
Songyi Kim et al.
  • 1Korea Polar Research Institute, Incheon, Republic of Korea (
  • 2Ewha Woman's University, Seoul, Korea, Republic of Korea (

Precipitation plays an important role in the global hydrological cycle, and its stable isotope ratio (δ2H, δ18O and δ17O) provides useful information for atmospheric circulation in forming precipitation. However, understanding of precipitation stable isotope ratio in mid-latitude is limited by an insufficient and restricted interpretation of hydrological and meteorological processes based on insufficient datasets. To improve domain knowledge, we monitored the water stable isotopes of rainwater and snowfall in Seoul, Korea, during the period of 2016-2022. The δ2H, δ18O and δ17O values varied from -120.3 to 3.9 ‰, from -16.58 to 1.21 ‰ and from -8.76 to 0.65 ‰, respectively with characteristic seasonal patterns. The prominent patterns were the isotopic depletion during winter (Dec-Feb; the mean δ2H of -9.39 ‰) under the influence of the Siberian High system and the isotopic enrichment during the spring (Mar-May; the mean δ2H of -2.6 ‰) affected by the Asia monsoon system. The summer season was characterized by the lowest deuterium excess (δ2H­ – 8 x δ18O; 7.4 ‰). As the interplay of the northeast Asia monsoon, and the Siberian High and the North Pacific High was the major cause of the seasonality of the isotope values, their covariance with temperature or the amount of precipitation was weak. The local meteoric water line had a lower slope and intercept (δ2H = 7.67 x δ18O + 9.28) compared to the global meteoric water line. Another local meteoric water line between δ17O and δ18O appeared to be δ17O = 0.5312 x δ18O + 0.0068 with a greater slope and intercept than its global meteoric line.

How to cite: Kim, S., Han, Y., Moon, J., Nyamgerel, Y., and Lee, J.: Stable isotope ratios (δ2H, δ18O and δ17O) of precipitation in Seoul, Korea, during 2016-2020, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-11452,, 2023.