概括
航天飞机实验揭示了赤道洋流每年在位置和强度上发生变化,而热结构保持稳定. 这项研究为通过简单的热和海平面观测来监测海洋动态提供了基础.
科学领域:
- 海洋学 海洋学 海洋学
- 气候科学 气候科学
- 流体动力学 流体动力学
背景情况:
- 赤道海洋表现出由大气强迫影响的复杂循环模式.
- 了解这些动态对于气候模型和预测海洋变化至关重要.
研究的目的:
- 为了观察赤道海洋结构和循环变化.
- 研究主要赤道电流的变化和相互作用.
- 建立一个科学基础,利用热结构和海平面数据监测海洋流.
主要方法:
- 在夏威夷和大溪地之间进行航天飞机实验 (1979年1月至1980年6月).
- 使用一系列漂流浮标来追踪电流.
- 分析热结构和海平面数据.
主要成果:
- 在研究期间,赤道热结构保持完整.
- 海洋电流的位置和强度显示出每年的显著变化.
- 赤道下流的水运波动,并观察到强烈的短期脉动.
- 赤道表面流向在每月和更长的时间表中表现出对风的强烈反应.
- 在赤道逆流中漂流浮标在长距离上经历了最小的分散.
结论:
- 赤道洋流的年度变化主要是由于位置和强度的变化,而不是结构变化.
- 北方赤道逆流的低频波动可以通过海平面差异有效地监测.
- 该研究验证了简单的热结构和海平面观测,用于监测赤道海洋动态.
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