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Latitude Dictates Global Marine Diatom Dynamics: Insights From 25 years of Satellite Data
编号：1548 访问权限：仅限参会人 更新：2026-09-01 01:21:42 浏览：0次 口头报告

报告开始：暂无开始时间（Asia/Shanghai）

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摘要
Marine diatoms are key players in global biogeochemical cycles, yet their spatiotemporal dynamics and the underlying drivers remain poorly understood. Here, we developed a novel remote sensing model and utilized 25 years of global satellite data to investigate marine diatom biomass. Our observations reveal distinct latitude-dependent distributions, with higher biomass in high-latitude and coastal waters. Trend analysis reveals a widespread increase in diatom biomass across most ocean regions, with significant growth rates ranging from 0.1 to 1.6 × 10−5 mg m−3 per month. This trend stands in sharp contrast to the declines observed in equatorial waters and is accompanied by pronounced seasonal oscillations. Causality analysis identifies sea surface temperature, mixed layer depth, and photosynthetically active radiation as dominant drivers of diatom dynamics in mid-latitudes. Nutrients, particularly nitrate in subtropical waters and silicate, also exert a significant influence. While broad-scale climate indices showed limited explanatory power for global diatom anomalies, their impact was most evident in equatorial oceans. These findings provide the first comprehensive view of the multifaceted drivers of global marine diatom dynamics, offering crucial insights into their role in ocean biogeochemistry and responses to environmental change.
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报告人
Deyong Sun
Nanjing University of Information Science and Technology

稿件作者
Deyong Sun Nanjing University of Information Science and Technology
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重要日期

  • 会议日期

    01月12日

    2027

    至

    01月15日

    2027

  • 07月21日 2026

    初稿截稿日期

  • 01月15日 2027

    注册截止日期

主办单位
State Key Laboratory of Marine Environmental Science, Xiamen University (MEL)
Department of Earth Sciences, National Natural Science Foundation of China (NSFC)
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