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Circulation

机译:循环

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摘要

Fjord exchange circulation and its response to abrupt changes in forcing is examined by means of an idealized modeling experiment. Puget Sound, a fjord-type estuary in western North America (State of Washington), is the main context for this study. Parameters of the idealized model are representative of the entrance sill at Admiralty Inlet and the Main Basin of Puget Sound. Sensitivity to some of the model parameters relevant to a 3D realistic model is discussed. An idealized tidal forcing with fortnightly modulation drives a qualitatively realistic cycle of exchange circulation while the other boundary conditions are kept fixed in time. The cycle is characterized by fortnightly pulses of deep water intrusions with a sharp front at the leading edge and reversed circulation cells below the sill depth developing between the intrusions. This basic state is then perturbed and response of the circulation to abrupt changes in oceanic salinity and river discharge is examined.
机译:峡湾交换环流及其对强迫突变的反应是通过理想化的模型实验研究的。北美西部(华盛顿州)的峡湾型河口普吉特海湾是这项研究的主要内容。理想化模型的参数代表了金钟湾入口和普吉特海湾主盆地的门槛。讨论了对与3D现实模型相关的某些模型参数的敏感性。每两周进行一次理想化的潮汐强迫驱动交换循环的定性逼真的循环,而其他边界条件则及时保持不变。该周期的特征是每两周一次的深水侵入脉动,在前沿处有锋利的前锋,并且在两次侵入之间形成的基岩深度以下形成了反向循环单元。然后扰动该基本状态,并检查循环对海洋盐度和河流流量突变的响应。

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  • 来源
    《Oceanographic Literature Review》 |2009年第3期|496-499|共4页
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