Response of particulate organic matter dynamics to the ocean front induced by typhoon Talim in Zhanjiang Bay

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research Pub Date : 2024-10-11 DOI:10.1016/j.marenvres.2024.106784

Chunqing Chen , Qibin Lao , Haoyu Yao , Xuan Lu , Qingmei Zhu , Shangjun Cai , Fajin Chen

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Abstract

Typhoons greatly affect ocean hydrodynamics, thereby altering ocean productivity and biogeochemistry. This study used stable isotopes and geochemical indicators of particulate organic matter (POM) to investigate the impact of Typhoon Talim (2023) on marine productivity and POM dynamics in Zhanjiang Bay. During the typhoon, an ocean front formed in the upper bay, resulting in a nearly twofold increased POM and enhanced decomposition of resuspended POM, due to the strengthened vertical mixing. Despite of strong decomposition, the supplementation of terrestrial nutrient inputs maintained minimal changes in chlorophyll in the upper bay. By contrast, in the lower bay, chlorophyll and POM decreased significantly, primarily attributed to decomposition of fresh POM and nitrogen limitation resulting from high-salinity seawater intrusion induced by the typhoon. This study suggests that after typhoons, in the area where the ocean front forms, the decomposition degrades a large amount of resuspended POM, which is not conducive to the burial of organic carbon.

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湛江湾台风 "塔林 "诱发的海洋锋面颗粒有机物动力学响应

台风对海洋水动力有很大影响，从而改变海洋生产力和生物地球化学。本研究利用稳定同位素和颗粒有机物（POM）地球化学指标研究了台风 "塔林"（2023年）对湛江湾海洋生产力和POM动态的影响。台风期间，湛江湾上部形成了洋锋，由于垂直混合加强，POM增加了近两倍，再悬浮POM的分解也加强了。尽管分解作用很强，但陆地营养物质的补充使得上海湾的叶绿素变化很小。相比之下，下海湾的叶绿素和 POM 显著下降，主要原因是新鲜 POM 的分解和台风导致的高盐度海水入侵造成的氮限制。这项研究表明，台风过后，在形成洋锋的区域，大量重新悬浮的 POM 被分解降解，不利于有机碳的埋藏。

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来源期刊

Marine environmental research 环境科学-毒理学

CiteScore

5.90

自引率

3.00%

发文量

217

审稿时长

46 days

期刊介绍： Marine Environmental Research publishes original research papers on chemical, physical, and biological interactions in the oceans and coastal waters. The journal serves as a forum for new information on biology, chemistry, and toxicology and syntheses that advance understanding of marine environmental processes. Submission of multidisciplinary studies is encouraged. Studies that utilize experimental approaches to clarify the roles of anthropogenic and natural causes of changes in marine ecosystems are especially welcome, as are those studies that represent new developments of a theoretical or conceptual aspect of marine science. All papers published in this journal are reviewed by qualified peers prior to acceptance and publication. Examples of topics considered to be appropriate for the journal include, but are not limited to, the following: – The extent, persistence, and consequences of change and the recovery from such change in natural marine systems – The biochemical, physiological, and ecological consequences of contaminants to marine organisms and ecosystems – The biogeochemistry of naturally occurring and anthropogenic substances – Models that describe and predict the above processes – Monitoring studies, to the extent that their results provide new information on functional processes – Methodological papers describing improved quantitative techniques for the marine sciences.