Abstract
The precipitation types (convective, stratiform, and mixed precipitation) are related to different atmospheric processes. To understand the isotopic characteristics of different types of precipitation, we collected 121 intra-event precipitation samples in Lanzhou of China from June to October 2021. These precipitation events were divided into mixed precipitation and stratiform precipitation using radar images. In the mixed precipitation events, the δ18O values show a similar variation trend. In contrast, the δ18O values of stratiform precipitation events have no coherent trend and are associated to local meteorological factors. The slope and intercept of local meteoric water line indicate that stratiform precipitation is more susceptible to evaporation. Our results provide observational constraints for understanding of isotope variations in different types in mid-latitude semi-arid region.
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Data availability
The isotope and meteorological datasets are available from the corresponding author on reasonable request. The ERA5 climate database was retrieved from https://cds.climate.copernicus.eu. The radar images were available from http://data.cma.cn.
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Acknowledgements
Thanks to Shengjie Wang (Northwest Normal University) for the suggestions.
Funding
This study was supported by the National Natural Science Foundation of China (No. 42071047 and 41771035).
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All authors have contributed to this manuscript and have approved the final version. Tian Y designed the project and wrote the manuscript. Yue X and Xiao H collected data and did the laboratory work. Che C participated in the revision of the paper and examined expressions and spelling of words. Zhang M reviewed the manuscript and proposed revisions.
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Zhang, M., Tian, Y., Che, C. et al. Isotopic signals of different rainfall types revealed by intra-event rainfall analysis. Theor Appl Climatol 155, 1093–1102 (2024). https://doi.org/10.1007/s00704-023-04681-0
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DOI: https://doi.org/10.1007/s00704-023-04681-0