Earth System Science Data
Earth System Science Data
Earth System Science Data
Articles | Volume 18, issue 2
Articles | Volume 18, issue 2
https://doi.org/10.5194/essd-18-1489-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-18-1489-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 2
Data description article
 | 
26 Feb 2026
Data description article |  | 26 Feb 2026

Seasonal patterns and diagnostic values of δ2H, δ18O, d-excess, and Δ′17O in precipitation over Seoul, South Korea (2016–2020)

Songyi Kim, Yeongcheol Han, Hyejung Jung, and Jeonghoon Lee

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Short summary
This study presents a five-year (2016–2020) high-resolution record of precipitation isotopes (δ²H, δ¹⁸O, d-excess, and Δ′¹⁷O) in Seoul, South Korea. All isotopes exhibit strong seasonal cycles controlled by temperature, monsoon rainfall, and moisture source humidity. d-excess reflects source-region evaporation, while Δ′¹⁷O shows reduced seasonal sensitivity and highlights atmospheric mixing and transport processes, providing new constraints on East Asian hydroclimate dynamics. 
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