关键词: Decomposition Organic matter Phytoplankton blooms Typhoons

Mesh : Cyclonic Storms Oceans and Seas Climate Water Phytoplankton / physiology

来  源:   DOI:10.1016/j.marpolbul.2023.115408

Abstract:
Typhoons are extreme weather events that can not only affect marine dynamics, but also change marine biogeochemistry, considerably impacting the climate. Based on the satellite remote sensing data, the upwelling of abundant nutrients induced by typhoons from deeper eutrophic water to the upper oligotrophic layer triggers phytoplankton blooms in the upper oceans, thereby increasing new productivity (as a carbon sink). However, field observations have shown that organic matter decomposition (as a carbon source) is the dominant process regardless of whether phytoplankton blooms occur after typhoons, resulting in oxygen consumption in the water column. Therefore, it is particularly important to comprehensively study the coupling mechanisms of biogeochemistry and dynamics in the ocean after typhoons. Here, we present a systematic overview summarizing the effects of typhoons on marine dynamics and biogeochemistry and elaborating on the characteristics and mechanisms of organic matter decomposition induced by typhoons.
摘要:
台风是极端天气事件,不仅会影响海洋动力学,但也改变了海洋生物地球化学,极大地影响了气候。根据卫星遥感数据,台风从更深的富营养化水体到上层的贫营养层引起的丰富养分的上升流引发了上层海洋的浮游植物大量繁殖,从而提高新的生产率(作为碳汇)。然而,野外观察表明,无论台风后是否发生浮游植物开花,有机物分解(作为碳源)都是主要过程,导致水柱中的氧气消耗。因此,全面研究台风过后海洋中生物地球化学和动力学的耦合机制尤为重要。这里,本文系统综述了台风对海洋动力学和生物地球化学的影响,并阐述了台风诱导有机质分解的特点和机理。
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