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海面温度和甲度的长期变化在巴哈加利福尼亚州以外的太平洋地区

Ricardo García-Morales¹, Edgardo B Farach-Espinoza², Hugo Herrera-Cervantes³

¹Centro de Investigaciones Biológicas del Noroeste S.C. Unidad Nayarit (UNCIBNOR), Tepic, Nayarit, Mexico.

Marine environmental research

|April 23, 2025

概括

巴哈加利福尼亚州沿岸的太平洋地区显示出独特的生物区域,海面温度和叶绿素a的变化. 像ENSO和PDO这样的气候模式推动了变化,导致海洋变暖和生产力下降,这表明了热带化.

科学领域:

海洋生态海洋生态学
海洋学海洋学海洋学
气候科学是气候科学.

背景情况:

巴哈加利福尼亚州 (PBC) 外的太平洋地区是加利福尼亚电流系统 (CCS) 内的高生产率区域.
海洋表面温度 (SST) 和叶绿素-a (Chl-a) 的变化需要区域化进行独立研究和关系分析.
了解这些动态对于评估生态系统健康和气候变化影响至关重要.

研究的目的:

使用卫星数据,基于SST和Chl-a同质性的PBC区域化.
从2000-2022年分析SST和Chl-a的季节性和跨年变化.
调查厄尔尼诺南方振荡 (ENSO) 和太平洋十年振荡 (PDO) 对区域海洋学条件的影响.

主要方法:

卫星图像的分析.
集群分析以基于SST和Chl-a.确定基于SST和Chl-a.的同质区域
海洋学变量和气候指数的时间序列分析 (ENSO,PDO).

主要成果:

确定了七个不同的生物区域,在SST和Chl-a中具有显著的度梯度;北部地区表现出更高的生产力.
在所有生物区域中观察到SST和Chl-a的强烈季节性和跨年变化.
与ENSO和PDO相关的年间 (3-8年) 和十年 (10-12年) 周期被检测出来.
从冷欧 (2000-2012) 转变为热寡 (2013-2022) 条件发生了,受"斑块",强烈的厄尔尼诺和积极的PDO阶段的影响.
生物区域向北转移,南部地区扩大,这表明水的热带化可能与全球变暖有关.

结论:

在PBC表现出明显的生物区域与显著的气候驱动的变化.
气候波动 (ENSO,PDO) 和极端事件已经深刻地改变了该地区的热量和生产力制度.
观察到的北向转移和南部生物区域的扩张表明PBC水域正在进行热带化,这可能是全球变暖所致.

关键词:

生物区域是一个生物区域.孩子一个-a.恩索公司 (ENSO) 成立.在Mesoscale中,我们可以看到墨西哥太平洋地区墨西哥太平洋地区具有PDO的原产地是PDO.这是SST的SST.

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