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首页> 外文期刊>Marine ecology progress series >Impact of Typhoon Morakot on chlorophyll a distribution on the inner shelf of the East China Sea
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Impact of Typhoon Morakot on chlorophyll a distribution on the inner shelf of the East China Sea

机译：莫拉克台风对东海内陆架子叶绿素a分布的影响。

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ABSTRACT: To study typhoon-induced variations in chlorophyll a (chl a) distribution, 2 surveys were conducted on the inner shelf of the East China Sea, and 3 remote sensing images were selected before and after the passage of Typhoon Morakot. Chl a was predominantly present in coastal waters and the euphotic zone during normal, pre-typhoon conditions at a concentration 0.7 mg m-3. After the passage of the typhoon, the chl a concentration drastically declined to 0.5 mg m-3, except for in the surface layer in coastal areas, where the concentration of chl a was 1.0 mg m-3 due to the abundant fresh water supply from typhoon-induced runoff. Remote sensing data indicated that under normal conditions, the concentration of surface chl a was ~1.0 mg m-3, whereas it increased to 10.0 mg m-3 post-typhoon. A typhoon-initiated chl a increase showed a delay of ~4 to 7 d. A 3-stage conceptual model is proposed to describe the time-evolution of chl a. The first stage is the normal, pre-typhoon condition. The second stage is the typhoon-active period, when chl a generally decreases due to the presence of opposing factors, such as increasing turbidity and cloud cover, while in the coastal surface water layer, chl a is increased due to the fresh water supply. The third stage is the post-typhoon condition, when the opposing factors disappear and an increase in nutrient supply causes an increase in chl a.
机译：摘要：为了研究台风引起的叶绿素（il）a（chl a ）分布的变化，在东海内陆进行了两次调查，并获得了3幅遥感图像是在莫拉克台风通过之前和之后选定的。在正常的台风前条件下，Chl 主要集中在沿海水域和富营养区，浓度> 0.7 mg m -3 。台风过后，除了沿海地区表层的chl a 浓度急剧下降到<0.5mg m -3 由于台风诱发的径流提供了丰富的淡水，因此这些地区的chl a 浓度> 1.0 mg m -3 。遥感数据表明，在正常条件下，表面chl a 的浓度为〜1.0 mg m -3 ，而增加到> 10.0 mg m -3 台风过后。台风引发的chl a 升高显示约4至7 d的延迟。提出了一个三阶段的概念模型来描述chl a 的时间演化。第一阶段是正常的台风前状况。第二阶段是台风活跃期，此时，由于存在相反的因素（例如浊度和云量增加），导致chl a 通常下降，而在沿海地表水层中，chl a 由于新鲜水的供应而增加。第三阶段是台风过后的状况，当相反的因素消失并且养分供应增加导致chl a 增加时。

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