Eddy development and motion in the Caribbean Sea
Eddy development and motion in the Caribbean Sea
复制标题
DOI：
10.1029/2000jc000300
复制
发表时间：
2000-11-15
影响因子：
3.6
通讯作者：
Barton, ED
中科院分区：
文献类型：
--
作者：
Andrade, CA;Barton, ED
加勒比海的涡动是根据精确重复飞行任务(1992年10月至1993年12月)15个月期间用TOPEX/POSEIDON数据改正的ERS-1测高数据推导出的海平面异常。在卫星数据中观察到气旋和反气旋都是起源于委内瑞拉盆地或通过安的列斯通道进入加勒比海的异常，主要是圣卢西亚海峡、阿内加达通道和特立尼达北部。涡旋的直径从几十公里到700公里不等。平流速度一般为20-30厘米S(-1)，涡旋能量大(动能0.6m(2)S(-2))。它们的寿命一般为3-4个月，由它们与地形的相互作用决定。大多数涡旋活动在中美洲隆起区被侵蚀和消失，尽管有少数涡旋通过奇布查海峡进入开曼海。一些涡流也通过迎风航道从加勒比海以外的地方进入开曼海。巴拿马-哥伦比亚环流只有在热带雨季才明显。在降水最大的时段，出现了较强的经向盐度和风速梯度，形成了一个大的气旋性涡旋。加勒比海中部的涡旋似乎与蜿蜒的加勒比海流和强风卷曲的相互作用有关。
Eddy motion in the Caribbean Sea is described on the basis of sea level anomalies deduced from ERS-1 altimetry data corrected with TOPEX/Poseidon data during the 15 months of the Exact Repeat Mission (October 1992 to December 1993). Both cyclones and anticyclones were observed in the satellite data as anomalies originating in the Venezuelan Basin or entering the Caribbean through the Antillean passages, mainly the St. Lucia Channel, Anegada Passage, and north of Trinidad. The diameter of the eddies ranged from a few tens of kilometers to 700 km. Advection speeds were typically 20-30 cm s(-1) and the eddies were energetic (kinetic energy > 0.6 m(2) s(-2)). Their lifetime of 3-4 months was determined, in general, by their interaction with topography. Most eddy activity was eroded and disappeared at the Central American Rise area, although a few eddies crossed into the Cayman Sea through the Chibcha Channel. Some eddies also entered the Cayman Sea from outside the Caribbean through the Windward Passage. The Panama-Colombia Gyre was evident only during the tropical rainy season. A large cyclonic eddy was formed there during the period of maximum precipitation, when strong meridional salinity and wind speed gradients occurred. Eddy production in the central Caribbean appears to be associated with the interaction of the meandering Caribbean Current and the strong wind curl.