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首页> 外文期刊>Journal of marine systems: journal of the European Association of Marine Sciences and Techniques >Upwelling indices for comparative ecosystem studies: Variability in the Benguela Upwelling System
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Upwelling indices for comparative ecosystem studies: Variability in the Benguela Upwelling System

机译:比较生态系统研究的升高指标:Benguela Uppways系统的变异性

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The influence of climate variability on Eastern Boundary Upwelling Ecosystems (EBUEs) is evident through changes in productivity and shifts in species' distributions, yet to date, metrics of upwelling variability appropriate for comparative ecosystem studies have yet to be implemented. Here, we present synoptic-scale upwelling indices to quantify inter-annual to decadal variations in Ekman transport, at temporal and spatial scales relevant to the biota of EBUEs, and apply them to the Benguela Upwelling System (BUS). From 1979 to 2015, interannual, decadal-scale, and unidirectional variability in upwelling was observed, including a significant recent decrease in upwelling in the northern BUS, and a significant increase on the Agulhas Bank. These trends are associated with changes in the number of upwelling days and events in these regions, and correspond to a shift in the meridional positioning of the South Atlantic High pressure system. (C) 2017 Elsevier B.V. All rights reserved.
机译:气候变异性对东边界升高的生态系统(Ebue)的影响是通过生产力的变化和物种分布的变化明显,迄今为止,尚未实施适合对比较生态系统研究的升高变异性的指标。 在这里,我们展示了概要升值指数,以量化ekman运输的年度跨年代变化,在与Ebue的Biota相关的时间和空间尺度,并将它们应用于Benguela Uppway系统(公共汽车)。 从1979年到2015年,人们从1979年到2015年,互际,额外的规模和单向变异性,包括在北方公交车上升值的最近近期下降,而Agulhas Bank的显着增加。 这些趋势与这些地区的升高日和事件的数量的变化有关,并且对应于南大西洋高压系统的子午线定位的转变。 (c)2017 Elsevier B.v.保留所有权利。

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