npj Climate and Atmospheric Science ( IF 8.5 ) Pub Date : 2024-11-06 , DOI: 10.1038/s41612-024-00823-x Jie Hu, Jianlong Li, Narcisse Tsona Tchinda, Yaru Song, Minglan Xu, Kun Li, Lin Du
The uncertainty regarding the correlation between sea spray aerosol (SSA) formation and sea surface temperature (SST) hinders the accurate estimation of SSA’s impact on global climate. Here, we developed a temperature-controlled plunging SSA simulation tank to investigate the impact of SST on SSA formation from two perspectives: SSA particle size distribution and organic enrichment. Our findings show that SSA particle size decreases with decreasing SST, as exhibited by an increase in SSA within Aitken mode and a decrease in SSA within accumulation and coarse modes. SST can significantly enhance organic enrichment in SSA particles, while the multiplicative increases vary from 2 to 10 times depending on the organic matter species and the SSA particle size. Based on our experimental results, it is predicted that SST reduction may lead to a significantly higher contribution of Aitken modal SSA-derived CCN in cold waters (0 °C) than in warm waters (30 °C). Additionally, we incorporate SST for the first time in estimating the global flux of dissolved organic carbon (DOC) emitted via SSA, yielding a value ranging from 23.45 to 55.78 Tg C yr−1. Compared to previous works, our study reveals the crucial role of SST in influencing both cloud formation and the atmospheric organic burden of SSA.
中文翻译:
海面温度在海浪喷雾气溶胶形成和气候影响中的作用被低估
海浪气溶胶 (SSA) 形成与海面温度 (SST) 之间相关性的不确定性阻碍了对 SSA 对全球气候影响的准确估计。在这里,我们开发了一个温控下沉的 SSA 模拟罐,从 SSA 粒度分布和有机物富集两个角度研究 SST 对 SSA 形成的影响。我们的研究结果表明,SSA 粒径随着 SST 的降低而减小,表现为 Aitken 模式下 SSA 的增加以及积累和粗模式下 SSA 的减少。SST 可以显着增强 SSA 颗粒中的有机富集,而乘法增加从 2 到 10 倍不等,具体取决于有机物种类和 SSA 颗粒大小。根据我们的实验结果,预计 SST 降低可能导致 Aitken 模态 SSA 衍生的 CCN 在冷水 (0 °C) 中的贡献明显高于在温水中 (30 °C) 中的贡献。此外,我们首次将 SST 纳入估计通过 SSA 排放的溶解有机碳 (DOC) 的全球通量,得出的值范围为 23.45 至 55.78 Tg C yr-1。与以前的工作相比,我们的研究揭示了 SST 在影响云形成和 SSA 大气有机负荷方面的关键作用。