通过内部波的远程传播来重新分配海洋混合所需的能量
1Applied Physics Laboratory and School of Oceanography, University of Washington, 1013 NE 40th Street, Seattle, Washington 98105, USA. malford@apl.washington.edu
Nature
|May 9, 2003
概括
内部引力波驱动海洋混合,影响气候和海洋生态系统. 这项研究绘制了它们的传播图,揭示了影响全年全球混合模式的能量流.
科学领域:
- 海洋学 海洋学 海洋学
- 流体动力学 流体动力学
- 气候科学是气候科学.
背景情况:
- 海洋混合对于污染物分散,海洋生产力和全球气候调节至关重要.
- 沿着海洋分层传播的内部重力波是海洋混合的主要驱动力.
- 需要一个内部波散散的全球地图来改进气候模型.
研究的目的:
- 从历史的泊位数据计算水平内部波传播.
- 为了将内部波传播与它们的能量源关系起来.
- 了解全球混合所需能量的时空分布.
主要方法:
- 利用来自60个历史泊的数据来计算水平内部波传播.
- 分析的能量频率范围:近惯性和半日潮频率.
- 与这些内部波相关的量化能量流.
主要成果:
- 在近惯性和半日性潮频段中的能量流量大约为1kW x m(-1).
- 这些流量占总能源投入的15-50%,并从源区域转移出去.
- 接近惯性波的能量流在冬季更强,而潮流在全年保持一致.
结论:
- 内部引力波显著影响海洋中混合能量的空间和时间分布.
- 了解近惯性和潮波传播是预测海洋混合及其气候影响的关键.
- 这些发现为完善气候模型和了解海洋动态提供了必要的数据.
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