Biologically Induced Changes in the Partitioning of Submicron Particulates Between Bulk Seawater and the Sea Surface Microlayer
Biologically Induced Changes in the Partitioning of Submicron Particulates Between Bulk Seawater and the Sea Surface Microlayer
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DOI：
10.1029/2021gl094587
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发表时间：
2022-01-28
影响因子：
5.2
通讯作者：
Thiemens, Mark H.
中科院分区：
文献类型：
--
作者：
Crocker, Daniel R.;Deane, Grant B.;Thiemens, Mark H.
近二十年来的研究表明，亚微米粒子（SMPs）可以从海水转移到海洋喷雾气溶胶（SSA）中，从而潜在地影响SSA的云播种能力。这项工作报告了首次同时进行的体积和海面微层（SSML） SMP （0.4-1.0 μ m）测量，该测量是在一个没有活跃破波和气泡形成的地区进行的，为了解生物和物理化学过程如何影响海水SMP分布提供了见解。SMP大小分布的模态分析揭示了由微生物环控制的多个生物相关颗粒种群的贡献。由于气泡清除作用可以忽略不计，在两个实验中，SMPs的SSML富集仍然很低，这表明清除对SSML中SMP的富集至关重要。我们的研究结果在SMP向SSA转移及其对SSA云播种能力的潜在重要性的背景下进行了讨论。
Studies over the last two decades have shown that submicron particulates (SMPs) can be transferred from the seawater into sea spray aerosol (SSA), potentially impacting SSA cloud seeding ability. This work reports the first concurrent bulk and sea surface microlayer (SSML) SMP (0.4-1.0 mu m) measurements, made during two mesocosm phytoplankton blooms in a region devoid of active wave breaking and bubble formation, providing insight into how biological and physicochemical processes influence seawater SMP distributions. Modal analyses of the SMP size distributions revealed contributions from multiple, biologically related particulate populations that were controlled by the microbial loop. With negligible bubble scavenging occurring, SSML enrichment of SMPs remained low throughout both experiments, suggesting scavenging is vital for SMP enrichment in the SSML. Our findings are discussed in the context of SMP transfer into SSA and its potential importance for SSA cloud seeding ability.