Variation of stable isotope signals in precipitation during Typhoon In-Fa (2021), Eastern China

ABSTRACT

High-resolution stable isotope precipitation records are crucial for understanding the mechanism of isotope variations during typhoon precipitation events. We present hourly stable isotope time series of precipitation during Typhoon InFa (2021) in Kunshan and Yangzhou, in the lower reaches of the Yangtze River, Eastern China. Precipitation δ¹⁸O in Kunshan and Yangzhou ranged from −1.3‰ to −12.3‰ and −2.8‰ to −17.1‰, respectively. Both δ¹⁸O time series shifted to more negative values as the typhoon approached. The evolution of precipitation δ¹⁸O during the typhoon is likely caused by a combination of Rayleigh distillation and microphysical processes. Precipitation δ¹⁸O values in Yangzhou are more negative than those in Kunshan with a lag of ~14 h. This was mainly controlled by further continuous rainout processes during the movement of Typhoon InFa from Kunshan to Yangzhou and higher condensation efficiency. This study improves our understanding of the mechanisms underlying stable isotope changes during typhoon precipitation.

KEYWORDS:

• Stable isotope
• precipitation
• Rayleigh distillation
• upstream rainout
• Typhoon In-Fa
• Eastern China

Editor R. Singh; Associate Editor G. Jeelani

Editor R. Singh; Associate Editor G. Jeelani

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

The data that support the findings of this study are available in the supplementary material of this article and can be accessed online at https://doi.org/10.1080/02626667.2024.2355977.

Supplementary material

Supplemental data for this article can be accessed online at https://doi.org/10.1080/02626667.2024.2355977

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [Grant No. 42071106]; and the International Cooperation Project of Fujian [2022I0013].