2022年印度洋的一个负生物双极事件
Wei Shi1,2, Menghua Wang3
1NOAA National Environmental Satellite, Data, and Information Service, Center for Satellite Applications and Research, E/RA3, 5830 University Research Ct., College Park, MD, 20740, USA. wei.1.shi@noaa.gov.
Scientific reports
|January 11, 2024
概括
2022年10月发生的一次负生物印度洋双极 (BIOD) 事件影响了海洋甲基水平. 这一事件导致东部的叶绿素a 减少,西部的 IOD 区域的水平增加.
科学领域:
- 海洋生态海洋生态学
- 海洋学 海洋学 海洋学
- 遥感 遥感 遥感 遥感
背景情况:
- 印度洋双极 (IOD) 显著影响地区气候和海洋生态系统.
- 对IOD事件的生物反应,特别是有关甲 (Chl-a) 分布的生物反应,需要进行详细的研究.
研究的目的:
- 分析2022年10月印度洋负生物双极 (BIOD) 事件对Chl-a分布的影响.
- 为了研究物理海洋学条件和负 BIOD 事件期间的 Chl-a 异常之间的关系.
主要方法:
- 利用生物双极模式指数 (BDMI) 来识别负 BIOD 事件.
- 使用可见红外成像放射仪套件 (VIIRS) 数据分析了Chl-a异常,将2022年10月与气候学相比较.
- 检查了Chl-a异常和20°C同热 (ISO20) 深度异常之间的相关性.
主要成果:
- 在2022年10月,观察到一个负 BIOD 事件 (BDMI: -0.31).
- 显而易见的是负Chl-a双极特征,东部IOD区域 (苏门答腊海岸) 的压抑水平和西部IOD区域的增强水平.
- 东部的Chl-a比为0.4-0.5,西部为1.5-1.6,与ISO20深度异常相吻合.
结论:
- 2022年的负 BIOD 事件是由物理海洋学变化影响的营养动态驱动的.
- 东部的压抑的Chl-a是由于水的上游和加深的热流层造成的,导致营养物质较低.
- 西部地区的增强的Chl-a与地表水分歧和冲浪热带线增加的营养物质有关.
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