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首页> 外文期刊>Estuarine Coastal and Shelf Science >Control of the phytoplankton distribution in the Strait of Gibraltar by wind and fortnightly tides
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Control of the phytoplankton distribution in the Strait of Gibraltar by wind and fortnightly tides

机译：风和每两周潮汐对直布罗陀海峡浮游植物分布的控制

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摘要

CTD―fluorescence―turbidity profiles from two surveys conducted in June and September 1997 were examined in order to evaluate the influence of the predictable fortnightly (springeap) tidal cycle and the less predictable wind on the phytoplankton distribution in the Strait of Gibraltar. The injection of the nutrient-rich North Atlantic Water (NACW) in the Atlantic inflowing current is associated with initial phytoplankton blooming conditions (high fluorescence, low turbidity). In September, a thick layer of NACW was recorded in the euphotic zone of the Atlantic side of the Strait, but biological variables showed post-bloom conditions. This is interpreted as the previous development of a phytoplankton bloom favoured by the ascent of NACW into the euphotic zone during the neap tide period. The passage of NACW through the Strait into the Mediterranean Sea was initially hindered by easterly winds and later by the spring tide. The neap tide period favoured the injection and passage of nutrient-rich North Atlantic Water (NACW) into the Atlantic inflowing current, enhanced during the westerly winds regime. During the spring tides, the injection and passage of NACW is hindered, especially when the easterlies blow. The contribution of the NACW to the primary production was estimated as 100―150 kg carbon s~(-1) (enhanced during the neap tides). The influence of the wind-driven upwelling along the NW Alboran Sea on the northeastern side of the Strait is discussed.
机译：为了评估可预测的每两周（春季/春季）潮汐周期和较难预测的风对直布罗陀海峡浮游植物分布的影响，对1997年6月和9月进行的两次调查的CTD“荧光”浊度曲线进行了检查。在大西洋流入流中注入营养丰富的北大西洋水（NACW）与初始浮游植物开花条件（高荧光，低浊度）有关。 9月，在海峡两岸大西洋的富营养区记录到了厚厚的NACW层，但生物学变量显示了开花后的状况。这被解释为在潮汐期之前，NACW上升到富营养区，有利于浮游植物开花。 NACW穿过海峡进入地中海最初受到东风的阻碍，后来又受到春季潮汐的阻碍。潮汐期有利于向北大西洋注入水注入营养丰富的北大西洋水（NACW）并使其通过，这在西风期间有所增强。在春季潮汐期间，NACW的注入和通过受到阻碍，特别是在东风吹袭时。 NACW对初级生产的贡献估计为100-150 kg碳s〜（-1）（在潮汐时期有所增强）。讨论了西北阿尔伯兰海沿岸风向上升流对海峡东北部的影响。

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