Evolution, movement and decay of warm-core Leeuwin Current eddies
Evolution, movement and decay of warm-core Leeuwin Current eddies
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DOI：
10.1016/s0967-0645(03)00055-9
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发表时间：
2003-01-01
影响因子：
3
通讯作者：
Morrow, R
中科院分区：
文献类型：
--
作者：
Fang, FX;Morrow, R
利用1995-2000年TOPEX/POSEIDON和ERS高度计资料的10天海平面异常图，研究了起源于Leeuwin海流（LC）的涡旋特征。在这6年中，从澳大利亚西海岸到东经90度，共追踪到37个长寿命的反气旋涡旋。每年产生三到九个漩涡，详细描述了它们的轨迹。大部分长寿命涡旋产生于5 - 6月，此时LC最强，并且在三个优选位置：20- 21.5度S，24- 25度S和28度-31度S。讨论了海平面异常的时间演化和纬向变化，以及海平面异常的半径和漂移速度。地形对涡旋的演变和结构有重要影响。与地形的相互作用可以诱导分裂或合并的涡进一步影响涡的衰减。(C)2003爱思唯尔科技有限公司版权所有。
Characteristics of eddies originating in the Leeuwin Current (LC) have been investigated using 10-day sea-level anomaly maps of combined TOPEX/POSEIDON and ERS altimeter data for the period 1995-2000. During these 6 years, 37 long-lived anticyclonic eddies were tracked from the west coast of Australian to 90degreesE. Between three and nine eddies were spawned each year, and their trajectories are described in detail. Most long-lived eddies are generated in May-June, when the LC is most intense, and at three preferred locations: 20-21.5degreesS, 24-25degreesS and 28degrees-31degreesS. The temporal evolution and latitudinal variations of the sea-level anomalies and their radius and drift speed are discussed. Topography plays an important role in the evolution and structure of the eddies. Interactions with topography can induce splitting or merging of eddies which further affects the eddy decay. (C) 2003 Elsevier Science Ltd. All rights reserved.