The Flow through the Gulf of Mexico
The Flow through the Gulf of Mexico
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DOI：
10.1175/jpo-d-18-0189.1
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发表时间：
2019-06-01
影响因子：
3.5
通讯作者：
Arriaza-Oliveros, L.
中科院分区：
文献类型：
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作者：
Candela, J.;Ochoa, J.;Arriaza-Oliveros, L.
四年（2012年9月至2016年8月）的同时电流观测横跨尤卡坦海峡（类似于21.5度N）和佛罗里达海峡（类似于81度W），使我们能够调查通过墨西哥湾的流动特征。根据先前的估计，两个信道中的平均传输为27.6 Sv（1 Sv = 10（6）m（3）s（-1））。在佛罗里达海峡部分，与天文潮有关的运输解释了55%的观测方差，具有混合的半日/全日性质，而在尤卡坦海峡潮汐贡献了82%的总方差，并呈现出主导的全日性质。在一个星期以上的时间里，尤卡坦和佛罗里达两个地区的输送量的相关系数为0.83，没有任何明显的滞后。在这两个渠道的运输时间序列的年运行手段是很好的相关性（0.98），并提出了3-Sv的范围内的变化，在4年的分析。这种长期变化与北大西洋北纬14.25度至18.75度之间的Sverdrup输送辐合密切相关。使用2年（2014年7月至2016年7月）在佛罗里达部分，佛罗里达电缆部分的同步电流观测（类似于北纬26.7度），以及横跨老巴哈马海峡的一段（类似于西经78.4度），分别获得了28.4、31.1和1.6 Sv的平均向北输送，这意味着在这2年期间，西北普罗维登斯海峡对凯布尔段观测到的平均输送量的贡献仅为1.1 Sv。
Four years (September 2012 to August 2016) of simultaneous current observations across the Yucatan Channel (similar to 21.5 degrees N) and the Straits of Florida (similar to 81 degrees W) have permitted us to investigate the characteristics of the flow through the Gulf of Mexico. The average transport in both channels is 27.6 Sv (1 Sv = 10(6) m(3) s(-1)), in accordance with previous estimates. At the Straits of Florida section, the transport related to the astronomical tide explains 55% of the observed variance with a mixed semidiurnal/diurnal character, while in the Yucatan Channel tides contribute 82% of the total variance and present a dominant diurnal character. At periods longer than a week the transports in the Yucatan and Florida sections have a correlation of 0.83 without any appreciable lag. The yearly running means of the transport time series in both channels are well correlated (0.98) and present a 3-Sv range variation in the 4 years analyzed. This long-term variability is well related to the convergence of the Sverdrup transport in the North Atlantic between 14.25 degrees and 18.75 degrees N. Using 2 years (July 2014-July 2016) of simultaneous currents observations in the Florida section, the Florida Cable section (similar to 26.7 degrees N), and a section across the Old Bahama Channel (similar to 78.4 degrees W), a mean northward transport of 28.4, 31.1, and 1.6 Sv, respectively, is obtained, implying that only 1.1 Sv is contributed by the Northwest Providence Channel to the mean transport observed at the Cable section during this 2-yr period.