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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Data assimilation model study of wind effects in the Santa Barbara Channel
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Data assimilation model study of wind effects in the Santa Barbara Channel

机译：圣塔芭芭拉海峡风影响的数据同化模型研究

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Seasonal mean circulation in the Santa Barbara Channel (SBC) consists of poleward flow on the northern shelf and equatorward flow on the southern shelf. While the equatorward flow is in the direction of the persistent, upwelling-favorable wind, the inshore poleward flow is against the wind. The channel circulation also has a strong seasonal signal that the cyclonic circulation strengthens considerably in spring and summer. A three-dimensional model is used to simulate the observed currents over an 8-month period from January to August 1994. The model assimilates the moored temperature and salinity data obtained from a comprehensive circulation study in the SEC-Santa Maria Basin (SME). The model also incorporates surface wind forcing; the mesoscale wind stress pattern is derived from a dense network of weather buoys. The model simulation reproduces well the surface mean currents and their seasonal (monthly) variability. The transient (less than seasonal) model velocity response consists of two fundamental modes, a wind-forced mode and an alongshore pressure gradient-forced mode. The wind-driven circulation is concentrated west of the channel in the SMB. The alongshore pressure gradient-forced motion is concentrated in the channel along the northern coast. Analysis of the evolution of inshore poleward current suggests that the spring transition in this region may coincide with the end of the winter storm season. [References: 19]
机译：圣塔芭芭拉海峡（SBC）的季节性平均环流由北部陆架的极向流和南部陆架的赤道流组成。当赤道风向是持续的，向上上升的有利风的方向时，近岸的杆向风却是逆风。通道循环还具有强烈的季节性信号，表明春季和夏季的气旋循环明显增强。使用三维模型来模拟从1994年1月到1994年8月的8个月中观测到的电流。该模型吸收了从SEC-圣玛丽亚盆地（SME）的全面循环研究获得的系泊温度和盐度数据。该模型还包括表面风强迫。中尺度风应力模式是由密集的天气浮标网络得出的。模型仿真很好地再现了表面平均电流及其季节性（每月）变化。瞬态（小于季节性）模型速度响应包括两个基本模式，即风强迫模式和沿岸压力梯度强迫模式。风力循环集中在中小型企业通道的西侧。沿岸压力梯度强迫的运动集中在北海岸的河道中。对近岸极流的演变分析表明，该地区的春季过渡可能与冬季风暴季节的结束相吻合。 [参考：19]

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