College of Oceanology and Meteorology, Guangdong Ocean University, Zhanjiang 524088, China.
College of Oceanology and Meteorology, Guangdong Ocean University, Zhanjiang 524088, China; Key Laboratory of Continental Shelf and Far-reaching Sea Climate, Resources and Environment, Guangdong Ocean University, Zhanjiang 524088, China; Key Laboratory of Space Marine Remote Sensing and Application, Ministry of Natural Resources, Beijing 100081, China; Laboratory of Offshore Ocean Change and Disaster Warning, College of Oceanology and Meteorology, Guangdong Ocean University, Zhanjiang 524088, China.
Mar Pollut Bull. 2024 Dec;209(Pt A):117077. doi: 10.1016/j.marpolbul.2024.117077. Epub 2024 Oct 10.
This study investigates the impact of typhoon-induced rainfall on coastal pollution dynamics in Zhanjiang Bay during the 2021 wet season, focusing on typhoons Lion and Kompasu. Typhoon-induced rainfall (217 mm) contributed 23 % of the total wet season precipitation. Concentrations of Cu, Zn, Cd, and As in rainwater during typhoons were significantly diluted, showing decreases of 48 %, 48 %, 54 %, and 42 %, respectively. In contrast, Pb concentrations remained consistent (29.5 vs. 29.3 μg L), indicating that increased local emissions offset the dilution effect. The deposition fluxes of these elements during typhoons accounted for 12-21 % of total wet season deposits. A positive matrix factorization model identified six primary sources, highlighting a rise in coal combustion contributions during typhoons. Overall, while typhoons reduced risks for Cu, Cd, and As, risks for Zn and Pb increased upon deposition on Zhanjiang Bay, illustrating the complex impact of typhoon-induced rainfall on coastal pollution dynamics.
本研究调查了 2021 年雨季台风降雨对湛江湾沿海污染动态的影响，重点关注了狮子山和圆规这两个台风。台风降雨（217 毫米）贡献了雨季总降水量的 23%。台风期间雨水样中 Cu、Zn、Cd 和 As 的浓度显著稀释，分别下降了 48%、48%、54%和 42%。相比之下，Pb 浓度保持一致（29.5 与 29.3μg/L），表明增加的本地排放抵消了稀释效应。这些元素在台风期间的沉积通量占雨季总沉积通量的 12-21%。正向矩阵因子模型识别出六个主要来源，突出显示了台风期间煤燃烧贡献的增加。总的来说，尽管台风降低了 Cu、Cd 和 As 的风险，但 Zn 和 Pb 在沉积到湛江湾后风险增加，这说明了台风降雨对沿海污染动态的复杂影响。
