The subtidal response of sea level to atmospheric forcing in the Carolina Capes
The subtidal response of sea level to atmospheric forcing in the Carolina Capes
复制标题
卡罗莱纳海角海平面对大气强迫的潮下响应
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
L. Pietrafesa
中科院分区：
文献类型：
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作者：
S. Chao;L. Pietrafesa
研究了1974年9月1日至12月31日4个月期间哈特拉斯角和查尔斯顿之间沿海地区海平面对大气强迫的潮下频率响应。发现低频海平面波动优先受到与局地地形一致的风应力分量的强迫。此外，还建立了查尔斯顿沿海地区海面对顺时针旋转风响应的局部一维模型。该模型预测的沿海风分量与海平面的相位谱与查尔斯顿（一个开放的沿海地区）的实际观测结果相比较有利。模式结果和观测结果还表明，由于摩擦、科里奥利力和海底地形的共同作用，风引起的沿海海平面波动被困在距离海岸40公里的范围内。外大陆架主要受波动影响，这些波动与风应力的关系较小，而且相对稳定。
Abstract The subtidal frequency response of sea level to atmospheric forcing along the coastal region between Cape Hatteras and Charleston is investigated for a four-month period: 1 September-31 December, 1974. It is found that low-frequency sea level fluctuations are preferentially forced by wind stress components which are aligned with the local topography. Also, a localized, one-dimensional model of sea surface response to a clockwise rotating wind for the Charleston coastal regime is developed. The phase spectrum of the alongshore wind component versus sea level as predicted by the model is shown to compare favorably to that derived from actual observations at Charleston, an open ocean coastal site. The model results and observations also suggest that wind-induced fluctuations of coastal sea level are trapped within 40 km of the coast by the combined effects of friction, Coriolis force and bottom topography. The outer shelf is dominated by fluctuations which are less related to wind stress and are att...