南极冬季的强度和时间 安哥拉沿海上升
Mareike Körner1,2, Peter Brandt3,4, Marcus Dengler3
1GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany. mareike.koerner@oregonstate.edu.
Scientific reports
|November 9, 2024
概括
安哥拉上升的时间和强度是可以预测的. 赤道风和大西洋海面温度的变化会影响沿海被困波浪 (CTW),影响这个富有生产力的生态系统.
科学领域:
- 海洋学 海洋学 海洋学
- 海洋生态海洋生态学
- 气候科学 气候科学
背景情况:
- 安哥拉热带上游系统 (tAUS) 是一个重要的,高生产力的海洋生态系统.
- 它的生产力在南方冬季达到顶峰,由沿海被困波 (CTWs) 驱动.
- 这种生产力的强度与上升的CTW的振幅相关.
研究的目的:
- 分析南方冬季上游CTWs的时间和振幅的年对年变化.
- 确定影响这些变化的关键海洋和大气驱动因素.
- 在季节性时间尺度上评估 tAUS 生产率的可预测性.
主要方法:
- 对海面温度数据的分析.
- 对海平面异常记录的检查.
- 研究风场变化的研究.
主要成果:
- CTW时间受赤道和南非沿海变化的影响.
- 较弱的赤道东风 (四月至七月) 延迟了CTW的到来.
- CTW振幅与东方赤道和南大西洋中部的条件有关,特别是南大西洋反旋风.
结论:
- 赤道东风的变化影响了上升的凯尔文波和随后的CTW的时间.
- 东方赤道大西洋的降温加剧了区域风,增强了CTW的振幅.
- 在 tAUS 地区冬季上升CTW 的时间和振幅在季节性时间表上可预测.
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