Temporal variability of the isotope compositions of plum rain in Nanjing from event to interannual time scales

• Published in: Ying yong sheng tai xue bao Vol. 35; no. 4; p. 951
• Main Authors: Zhang, Hao, Xiao, Wei, Xie, Cheng-Yu, Hu, Yong-Bo, Chu, Hao-Ran, Wang, Jing-Yuan, Li, Xu-Hui
• Format: Journal Article
• Language: Chinese
• Published: China 18.04.2024
• Subjects: China; Deuterium - analysis; Environmental Monitoring - methods; Isotopes - analysis; Oxygen Isotopes - analysis; Prunus domestica - chemistry; Prunus domestica - growth & development; Rain - chemistry; Seasons; China; moisture source; plum rain; deuterium-excess; sub-cloud evaporation; precipitation isotopes
• ISSN: 1001-9332
• DOI: 10.13287/j.1001-9332.202404.017

Precipitation in the plum rain period accounts for 40%-50% of annual precipitation in the monsoon region. To clarify the temporal variability of the isotopic composition of precipitation during the plum rain period from event to interannual time scale and identify the influencing factors, we analyzed the isotopic composition of precipitation and its influencing factors in Nanjing from 2015 to 2022. By using the Hybrid Single-particle Lagran-gian Integrated Trajectory (HYSPLIT) model with specific humidity analysis, we investigated the water vapor source and influencing factors. The results showed that 1) the isotopic abundance of atmospheric precipitation was depleted in the summer and enriched in winter. was lower in summer and higher in winter. The isotopic abundance of precipitation from the plum rain was depleted compared to mean value of the whole-year. 2) There was no significant correlation between δ H and δ O of the plum rain (precipitation) with local meteorological factors. However, was lower in lig