桑托斯盆地陆坡和深水的海洋学条件:SANSED巡航(2019年冬季)

IF 1 4区 地球科学 Q3 MARINE & FRESHWATER BIOLOGY
Ilson C. A. da Silveira, P. S. Bernardo, C. Z. Lazaneo, João P. M. Amorim, Milton Borges-Silva, R. C. Martins, Daniel M. C. Santos, M. Dottori, Wellington C. Belo, R. Martins, L. A. A. Guerra, Daniel L. Moreira
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引用次数: 6

摘要

这项工作描述了SANSED 2019年冬季调查期间桑托斯盆地大陆斜坡和圣保罗高原的环流。该邮轮在2019年6月11日至8月3日期间由四段航程组成。观测到的环流以大西洋西南边界气流和远程产生的反气旋和气旋为主。前者由巴西流、中西边界流及其中尺度曲流组成;后者是300公里长的涡旋环,起源于南大西洋盆地的东侧。在卫星高度计地图上应用的拉格朗日方案表明,这些环的起源主要是南非的开普盆地。边界流及其气旋曲流和反气旋环之间的相互作用是复杂的,变化很大。在SANSED 2019年冬季调查期间,三个反气旋与巴西洋流相互作用,使其不稳定,与当前的气旋曲流形成偶极子,导致其下游传播。桑托斯盆地内的古气旋漩涡可能会干扰大型反气旋进一步向南的传播。此外,远源反气旋的持续到达,大部分在圣保罗高原上空,在整个巡航期间呈现逆时针环流的趋势。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Oceanographic conditions of the continental slope and deep waters in Santos Basin: the SANSED cruise (winter 2019)
This work describes the circulation over the continental slope and the São Paulo Plateau in the Santos Basin during the SANSED winter 2019 survey. The cruise consisted of four legs in the period between June, 11 and August, 03 2019. The observed circulation is dominated by the Atlantic southwestern boundary current regime and remotely-generated anticyclones and cyclones. The former is composed by the Brazil Current, the Intermediate Western Boundary Current and their mesoscale meanders; the latter are 300km vortical rings with origin in the eastern side of the South Atlantic Basin. A Lagrangian scheme applied over satellite altimeter maps indicate that the origin of these rings is primarily the Cape Basin off South Africa. The interaction between the boundary currents, their cyclonic meanders, and the anticyclonic rings is complex, and varies widely. During the SANSED winter 2019 survey period, three anticyclones interacted with the Brazil Current, instabilizing it, forming dipoles with the current cyclonic meanders, leading to their downstream propagation. Ancienter cyclonic eddies within Santos Basin may interfere with the propagation of the large anticyclones further south. In addition, the continuous arrival of remotely-originated anticyclones, the larger portion over the São Paulo Plateau presented a tendency of counter-clockwise circulation during the whole cruise period.
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来源期刊
CiteScore
1.60
自引率
12.50%
发文量
21
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