夏季在萨加米海的侧面气输入与深增强了微粒有机碳出口
Yoshihisa Mino1, Chiho Sukigara2, Daisuke Takahashi3
1Institute for Space-Earth Environment Research, Nagoya University, Nagoya, Japan.
Marine environmental research
|April 5, 2025
概括
来自东京湾的 (N) 显著增强了萨加米海的气体.
科学领域:
- 海洋生物地质化学海洋生物地质化学
- 海洋学 海洋学 海洋学
- 稳定同位素地球化学 稳定同位素地球化学
背景情况:
- 深海湾通过沉没有机颗粒物来封存碳.
- 表面的营养条件影响颗粒的产生,受到流入和混合的影响.
- 萨加米海的营养动态是理解碳出口的关键.
研究的目的:
- 调查地表水中悬浮颗粒 (PN) 同位素delta (δ15N) 的变化.
- 检查上层PN和萨加米海的营养动态.
- 确定输入对碳捕集的来源和影响.
主要方法:
- 在2007-2008年间,有8次重复观察.
- 表面水中悬浮颗粒 (PN) 同位素delta (δ15N) 的分析.
- 使用离岸和低盐度水的末端使用保守的混合模型的应用.
主要成果:
- δ15NPN表现出季节性变化 (冬季低,夏季高).
- 夏季 δ15 NPN 与盐度和PN度相关.
- 来自东京湾的淡水流入提供了74%的夏季暂停PN,高15N.
结论:
- 东京湾的淡水流入是萨加米海的主要气来源.
- 在大雨后增加的输入增加了夏季的生产力和碳出口.
- 夏季的输入对于出口有机碳颗粒和吸收大气中的CO2至关重要.
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