Numerical study of circulation, dispersion, and hydrodynamic connectivity of surface waters on the Belize shelf
Numerical study of circulation, dispersion, and hydrodynamic connectivity of surface waters on the Belize shelf
复制标题
伯利兹陆架地表水循环、扩散和水动力连通性的数值研究
DOI：
10.1029/2005jc002930
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发表时间：
2006
影响因子：
--
通讯作者：
P. Sale
中科院分区：
文献类型：
--
作者：
Liqun Tang;J. Sheng;B. Hatcher;P. Sale
使用嵌套网格海洋环流模拟系统来检验环流，
伯利兹大陆架上地表水的扩散和水动力连通性。这个
嵌套网格系统由一个高分辨率(�19公里)的西部外部模式组成
加勒比海，南部的一个中分辨率(�6公里)中模
中美堡礁系统(MBRS)和高分辨率(�2公里)内模式
在伯利兹货架上。嵌套系统受气候月平均面的强迫
强迫和整合超过5年。伯利兹大陆架的近地表环流
由内模产生的特征是强烈而持久的向西北方向移动
作为加勒比海流对西北大陆架的直接影响和微弱影响的流动
以及内部和南部陆架上的空间可变流动。月平均模型
电流被用来计算保守的近地表的滞留和分散。
由洋流携带的颗粒。近地表的色散相对较高。
灯塔和格洛夫斯礁环礁向海(以东)和内陆架更低的区域，
特别是在内航道和南水湾附近。至
研究伯利兹大陆架表层水域珊瑚礁的水动力连通性，我们
计算特纳夫群岛和澳大利亚珊瑚礁的上游和下游保留区
格洛夫斯礁环礁。被动、近地表粒子供应的潜在来源
在30天内到达这两个珊瑚礁环礁包括周围的浅水
这两个地点，它们之间的深水和海湾群岛的沿海水域
(洪都拉斯)。特内夫和格洛夫斯礁的30天下游保留区
环礁分别覆盖伯利兹大陆架的中部和南部。
A nested grid ocean circulation modeling system is used to examine the circulation,
dispersion, and hydrodynamic connectivity of surface waters on the Belizean shelf. The
nested grid system consists of a coarse-resolution (�19 km) outer model of the western
Caribbean Sea, an intermediate-resolution (�6 km) middle model of the southern
Meso-American Barrier Reef System (MBRS), and a fine-resolution (�2 km) inner model
of the Belizean shelf. The nested system is forced by climatological monthly mean surface
forcing and integrated over 5 years. The near-surface circulation on the Belize shelf
produced by the inner model is characterized by a strong and persistent northwestward
flow as a direct influence of the Caribbean Current on the northwestern shelf and a weak
and spatially variable flow on the inner and southern shelf. The monthly mean model
currents are used to calculate retention and dispersion of conservative, near-surface
particles carried by the ocean currents. The near-surface dispersion is relatively higher in
areas seaward (east) of Lighthouse and Glovers Reef atolls and lower on the inner shelf,
particularly within the Inner Channel and in the vicinity of South Water Cay. To
examine hydrodynamic connectivity of reefs in the surface waters of the Belize shelf, we
calculate upstream and downstream retention areas for coral reefs at Turneffe Islands and
Glovers Reef atolls. The potential sources of passive, near-surface particle supply
reaching these two reef atolls within 30 days include both the shallow waters surrounding
the two sites, the deep waters between them, and the coastal waters of the Bay Islands
(Honduras). The 30-day downstream retention areas of the Turneffe and Glovers Reef
atolls cover the central and southern Belize shelf, respectively.