...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Circulation along the Mexican Caribbean coast
【24h】

Circulation along the Mexican Caribbean coast

机译：墨西哥加勒比海沿岸的环流

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Data from an array of seven subsurface upward-looking moored Acoustic Doppler Current Profilers (ADCPs) and four subsurface pressure sensors deployed from August 2002 to August 2003 along the Caribbean coast of Mexico showed that the currents in the area have a predominant northeastward direction along the coast, are coherent within the upper 130 m of the water column, and have a general tendency to increase northward, reaching magnitudes of 2.4 m/s north of Cozumel. In addition, important weeklong reversal periods (southward flows) are observed around Chinchorro Bank. A vertical current profile EOF analysis at each station indicates high coherence within the study area, with the first vertical mode at each station explaining at least 69% of variance and current vectors aligned with the coast. A second EOF analysis carried out for any uniform depth level using current data from all stations shows high coherence in the horizontal as well. The first mode explains at least 59% of the variance and has a dominant 3-month-long variability. Comparison between the current patterns along the Mexican Caribbean coast and in the Yucatan Channel suggests that dynamics of the entire area might be strongly influenced by the passage of eddies through the region. Comparison of a Singular Spectral Analysis (SSA) of the principal components of currents with the pressure difference across the channels supports the idea of eddies modulating current variability. Numerical model results indicate that high values of the current intensity indexes are associated with eddies. The flow along Chinchorro and Cozumel channels is in geostrophic balance most of the observation time, but with week-long ageostrophic periods which are predominant off Cozumel. These events appear to occur when eddies are traversing the region.
机译：从2002年8月至2003年8月在墨西哥加勒比海岸部署的7个地下向上看的系泊声多普勒电流剖面仪（ADCP）和4个地下压力传感器的阵列数据显示，该地区的洋流沿该区域的主要方向是东北海岸，在水柱的上部130 m内是连贯的，并且有向北增加的总体趋势，达到科苏梅尔以北2.4 m / s的幅度。此外，在钦科罗河岸附近观察到重要的为期一周的逆转期（向南流动）。每个站点的垂直电流分布EOF分析表明研究区域内的高度连贯性，每个站点的第一垂直模式解释了至少69％的方差和与海岸对齐的电流矢量。使用来自所有测站的当前数据对任何均匀深度进行的第二次EOF分析也显示出水平方向的高度连贯性。第一种模式至少可以解释59％的差异，并且具有占主导地位的3个月之久的差异。墨西哥加勒比海沿岸和尤卡坦海峡目前的模式之间的比较表明，整个区域的动力学可能会受到涡流通过该区域的强烈影响。电流主要成分的奇异频谱分析（SSA）与通道两端的压差的比较支持涡流调制电流可变性的想法。数值模型结果表明，当前强度指数的高值与涡流有关。沿Chinchorro和Cozumel通道的流动在大多数观测时间处于地转平衡，但以Cozumel为主的长达一周的地转营养期。这些事件似乎是在涡旋遍历该区域时发生的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号