Features of the physical environment associated with green tide in the southwestern Yellow Sea during spring

BAO Min; GUAN Weibing; WANG Zongling; WANG Difeng; CAO Zhenyi; CHEN Qi

doi:10.1007/s13131-015-0692-x

春季西南黄海与绿潮相关的物理环境特征

doi: 10.1007/s13131-015-0692-x

1.
卫星海洋环境动力学国家重点实验室, 国家海洋局第二海洋研究所, 杭州310012, 中国
2.
卫星海洋环境动力学国家重点实验室, 国家海洋局第二海洋研究所, 杭州310012, 中国;物理海洋研究所, 浙江大学海洋学院, 杭州 310058, 中国
3.
国家海洋局第一海洋研究所, 青岛 266061, 中国

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出版历程
- 收稿日期: 2015-03-30
- 修回日期: 2015-04-16

Features of the physical environment associated with green tide in the southwestern Yellow Sea during spring

1.
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
2.
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;Institute of Physical Oceanography, Ocean College, Zhejiang University, Hangzhou 310058, China
3.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China

摘要

摘要: 从2007年开始, 每年夏天浒苔绿潮都会在黄海爆发, 并在当地导致巨大的经济损失。苏北浅滩有大规模的紫菜养殖业, 该地区被认为是浒苔绿潮最重要的发源地。为了揭示该地区浒苔漂浮和运动的物理机制, 本文研究了黄海西南部特别是苏北浅滩海域海流、温度、盐度和悬浮颗粒的特征。苏北浅滩辐射状沙洲的地形限制了该地区的海流, 并且导致了经向和纬向的净移动。经向的移动是将浒苔带到近海水域的主要动力因素。浒苔光合作用制造的气体量决定了紫菜筏架上剥落的浒苔是否可以漂浮到海水表面。苏北浅滩的水体具有高浑浊度, 导致水中显著的光衰减并影响水体中浒苔的光合作用。根据2012年卫星遥感数据, 苏北浅滩水域三个月平均(四月, 五月和六月)的表层悬浮物浓度是140 mg/dm³, 而该参数在苏北浅滩北部(34.5°N以北)是11 mg/dm³。根据4月月平均的表层悬浮物浓度, 苏北浅滩的透明度只有0.1 m, 但是苏北浅滩以外的海域, 透明度经常超过2.0 m。这个结果解释了为什么浒苔一旦离开苏北浅滩就会显著的增加。
- 浒苔 /
- 流 /
- 温度 /
- 盐度 /
- 悬浮物质
Abstract: Massive green tides caused by Ulva prolifera in the Yellow Sea have occurred every summer since 2007 and have caused huge economic losses for local governments. The Subei (North Jiangsu Province, China) Shoal, with its large-scale Porphyra aquaculture, has been regarded as the most important source of U. prolifera for green tides. To reveal the physical mechanisms of floating and drifting algae in this area, the characteristics of the current, the temperature, the salinity and suspended particulate matter (SPM) in the southwestern Yellow Sea, especially in the Subei Shoal, were studied. The topography of the radial sand ridges in the Subei Shoal constrains the features of the currents and causes net longitudinal and latitudinal movements. The longitudinal net movement is a dominant dynamic factor that can bring U. prolifera into offshore waters. The amount of gas that is produced by algae during photosynthesis determines whether U. prolifera can float well on the sea surface after it is disposed into the water from Porphyra aquacultural apparatus. The Subei Shoal is characterized by a high turbidity, which can result in significant light attenuation and affect the photosynthesis together with the buoyancy of a U. prolifera in the water. According to satellite remote sensing data from 2012, the three-month-averaged surface SPM (April, May and June) in the Subei Shoal was 140 mg/dm³, and the north of the Subei Shoal (the north of 34.5°N), it was 11 mg/dm³. According to the monthly averaged surface SPM in April, the transparency in the Subei Shoal was only 0.1 m, but it often exceeded 2.0 m outside of the Subei Shoal. The results explain why the floating ability of U. prolifera increases significantly once the green algae drifted outside the Subei Shoal.
- Ulva prolifera /
- current /
- temperature /
- salinity /
- suspended particulate matter

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参考文献(30)

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文章访问数: 1617
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春季西南黄海与绿潮相关的物理环境特征

doi: 10.1007/s13131-015-0692-x

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Features of the physical environment associated with green tide in the southwestern Yellow Sea during spring

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