On the seasonal variability of the currents in the Straits of Florida and Yucatan Channel
On the seasonal variability of the currents in the Straits of Florida and Yucatan Channel
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佛罗里达海峡和尤卡坦海峡洋流的季节变化
DOI：
10.1029/2010jc006679
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发表时间：
2011
影响因子：
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通讯作者：
L. Beal
中科院分区：
文献类型：
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作者：
C. Rousset;L. Beal
[1]利用5年的风和海流观测（海洋探索者号），结合3年的1/12°模拟，研究了加勒比主要通道的季节变化。在佛罗里达和尤卡坦半岛通道的季节性波动的特点都是半年周期与运输最大值在夏季和冬季和最小值在春季和秋季。在佛罗里达海峡，季节性变化与表面强化波动的佛罗里达电流，可以在很大程度上解释沿通道风和风应力旋度在大西洋。在尤卡坦海峡，季节性变率是正压和不协变与风强迫，而是与波动的反气旋环流南部的通道。在上游，格林纳达通道的季节性也与尤卡坦半岛和佛罗里达通道的季节性相互变化，尽管格林纳达通道只携带了加勒比总流入量的一小部分。最近对尤卡坦海峡平均输运的现场估计相差7 Sv（30.5 Sv，海洋探索者; 23.1 Sv，CANEK）。抽样误差，偏差和年际变化的评估似乎占不超过2 Sv，没有留下令人满意的解释的差异。在“海洋探测器”数据中，佛罗里达海峡和尤卡坦海峡的水流显示出类似的垂直切变结构，而CANEK数据显示出在500米以上的切变明显较低，这是所有输送差异的原因。
[1] Seasonal variability in the major passages of the Caribbean are investigated using 5 years of wind and current observations (Explorer of the Seas), combined with a 3 year 1/12° simulation. Seasonal fluctuations in the Florida and Yucatan passages are both characterized by semiannual cycles with transport maxima in summer and winter and minima in spring and fall. In the Straits of Florida, seasonal variability is associated with surface-intensified fluctuations of the Florida Current and can be largely explained by along-channel winds and wind stress curl over the Atlantic Ocean. In the Yucatan Channel, seasonal variability is more barotropic and does not covary with wind forcing but rather is associated with fluctuations of an anticyclonic recirculation to the south of the channel. Upstream, the seasonality in the Grenada Passage also covaries with seasonality in the Yucatan and Florida passages, although the Grenada Passage carries only a small fraction of the total inflow to the Caribbean. Recent in situ estimates of the mean transport in the Yucatan Channel differ by 7 Sv (30.5 Sv, Explorer of the Seas; 23.1 Sv, CANEK). An assessment of sampling errors, biases, and interannual variability seem to account for no more than 2 Sv, leaving no satisfactory explanation for the difference. In Explorer of the Seas data, flows in the Straits of Florida and Yucatan Channel display similar vertical shear structure, while CANEK data exhibit significantly lower shears in the upper 500 m, which account for all the transport difference.
观测并模拟与流入加勒比海的经向翻转环流相关的流量
影响因子：
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作者：
Kirchner;M. Rhein;C. Mertens;C.W. Böning;S. Hüttl
通讯作者：
S. Hüttl