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首页> 外文期刊>Continental Shelf Research: A Companion Journal to Deep-Sea Research and Progress in Oceanography >Are the spring and fall blooms on the Scotian Shelf related to short-term physical events?
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Are the spring and fall blooms on the Scotian Shelf related to short-term physical events?

机译：Scotian Shelf上的春季和秋季花朵与短期身体活动有关吗？

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Physical, chemical and biological data from the Scotian Shelf indicate that short-term physical events affect the dynamics of spring and fall blooms. This is based on results from a three-week mooring deployment measuring currents, temperature, salinity and fluorescence in October 2000, combined with biweekly sampling of temperature, salinity, nutrients and chlorophyll throughout the year at this mooring site. A wind-driven upwelling event in mid-October shows temperature, salinity and density iso-surfaces rising by approximately 20m. During this event, a bloom with peak chlorophyll concentrations of about 2.5 mg m(-3) began as nutrients are brought into the upper part of the water column. Gradient Richardson Numbers (Ri), a proxy for vertical mixing, are estimated for the mooring period in 2 m vertical bins using SeaHorse CTD data and nearby ADCP current measurements. These data indicate that vertical mixing may have played a complementary role to the upwelling in bringing nutrients into the euphotic zone. A trend of decreasing Ri in the ocean mixed layer with increasing surface wind stress is suggested. It appears that this short-term physical event is a primary factor in initiating the fall bloom on the inner Scotian Shelf in 2000. In April of that year, the termination of the spring bloom coincided with a downwelling event suggesting that it played a role in determining the duration of the bloom. SeaWiFS ocean color satellite provided a spatial context for chlorophyll observations, however, the lack of temporal resolution due to poor atmospheric conditions means that these data provide limited information on short-term chlorophyll variability. Crown Copyright (C) 2003 Published by Elsevier Ltd. All rights reserved. [References: 25]
机译：来自斯科蒂尔大陆架的物理，化学和生物学数据表明，短期的物理事件会影响春季和秋季绽放的动态。这是基于2000年10月进行的为期三周的系泊部署测量结果，测量电流，温度，盐度和荧光的结果，再加上该系泊地点全年两周一次的温度，盐度，养分和叶绿素采样。 10月中旬的一次风上升事件表明温度，盐度和密度等值面上升了约20m。在此事件中，随着营养物进入水柱上部，开始出现叶绿素浓度峰值约为2.5 mg m（-3）的水华。使用SeaHorse CTD数据和附近的ADCP电流测量值，可以估算2 m垂直仓中系泊周期的梯度Richardson Numbers（Ri）。这些数据表明，垂直混合可能将上升流中的养分带入富营养区。提出了随着表面风应力的增加，海洋混合层中Ri降低的趋势。看来，这种短期的物理事件是2000年开始在斯科特内架上开始秋季开花的主要因素。那年4月，春季开花的终止与下降事件相吻合，表明它在一定程度上起到了作用。确定开花的持续时间。 SeaWiFS海洋彩色卫星为叶绿素的观测提供了空间背景，但是，由于恶劣的大气条件而导致的时间分辨率不足，意味着这些数据提供的短期叶绿素变异性信息有限。 Crown版权所有（C）2003，由Elsevier Ltd.发行。保留所有权利。 [参考：25]

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