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在黄色海中沉积的空气中的有机物质的分子水平组成和来源

Haryun Kim¹, Kyoung-Soon Jang², Tae-Wook Kim³

¹Korea Institute of Ocean Science & Technology, Busan, 49111, Republic of Korea; University of Science & Technology, Daejeon, 34113, Republic of Korea.

Marine pollution bulletin

|October 31, 2025

概括

黄海空气中的有机物显示出区域成分的差异,影响了海洋的碳循环. 离岸沉积物更不稳定,而沿海沉积物更反抗,影响微生物的可用性和碳动态.

科学领域:

海洋化学海洋化学
大气科学大气科学
生物地质化学生物地质化学

背景情况:

空气中的有机物 (OM) 在海洋生物地球化学循环中起着至关重要的作用.
了解空气中的OM的分子组成对于预测其命运和对海洋环境的影响至关重要.
黄海是一个边缘海洋,受到各种陆地和海洋来源的影响,这使得它成为研究空中OM沉积的关键区域.

研究的目的:

为了分析空气中的有机物质 (OM) 的分子组成,这些有机物质沉积在黄海的近海和近海地区.
为了比较这两个不同的区域之间的空中OM的组成和来源.
评估空气中的OM成分区域差异对微生物利用和海洋碳循环的影响.

主要方法:

福利埃变换离子循环子共振质谱法 (FT-ICR MS) 用于确定空中OM的详细分子组成.
从黄海的近海和近海沉积区采集了样本.
化学表征的重点是识别OM中的反复性,可变性和人为性化合物.

主要成果:

海上空气中的OM主要是由来自陆地来源 (亚洲尘埃,河流排水,生物质燃烧) 的反抗性树脂素/树脂素化合物组成的.
来自海洋浮游生物的性蛋白质/碳水化合物类化合物是离岸的第二大部分,来源于海喷气气溶.
岸内地区显示出相似的反抗性和不稳定性OM比例,这两个地区都含有人为衍生的缩芳香/不和碳化合物类OM.

结论:

空气中的OM成分的区域差异影响其对海洋微生物和初级生产者的生物可用性.
与海上OM相比,内陆空气中的OM可能降解程度较低,并在水柱中持续更长时间.
该研究强调了陆地和海洋来源在塑造空气中的OM中的复杂相互作用,以及其在边际海洋碳循环和长期碳动态中的重要作用.

关键词:

空气中的有机物质.在FT-ICR MS中使用.分子水平的组成分子水平的组成.消息来源消息来源消息来源黄海是黄海的一个区域.

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