首页 | 期刊简介 | 编委会 | 投稿指南 | 常用下载 | 联系我们 | 期刊订阅 | In English
引用本文:于廉涛,张桂成,杨伟,赵亮,李梦婷,宋贵生.秦皇岛外海低氧区颗粒物吸收光谱特征.海洋与湖沼,2024,55(1):107-117.
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 223次   下载 441 本文二维码信息
码上扫一扫!
分享到: 微信 更多
秦皇岛外海低氧区颗粒物吸收光谱特征
于廉涛1, 张桂成2, 杨伟1, 赵亮2, 李梦婷1, 宋贵生1
1.天津大学海洋科学与技术学院 天津市海洋环境与安全保障重点实验室 天津 300072;2.天津科技大学海洋与环境学院 天津 300457
摘要:
近年来, 渤海夏季低氧现象频发, 引起了人们的广泛关注。然而对该海域低氧形成的机制还未得到充分认识。研究基于在秦皇岛外海的现场观测, 分析了海水中颗粒物吸收光谱特征及其与不同粒径浮游植物叶绿素a (chl a)组成、环境因子的关系, 评估了夏季底层水体脱氧过程中有机物来源与特征。结果显示,夏季秦皇岛外海微型浮游植物chl a占总量的80%。表层水体中, 总颗粒物吸收光谱[ap(l)]特征由浮游植物色素吸收光谱[aph(l)]主导, 在中、底层水体中则由碎屑颗粒物吸收光谱[ad(l)]主导。垂向上, ap(440)和ad(440)均表现为表层<中层<底层。结果还表明, 浮游植物粒径主导秦皇岛外海chl a的光吸收效率, 即a*ph(440)。基于三粒级chl a含量, 可利用多元回归预测aph(440)。碎屑颗粒物的吸收光谱同样受浮游植物群落、有机质相对含量等的影响。研究结果表明初级生产产生的微型颗粒有机物是底层水体脱氧的主要底物。
关键词:  颗粒物  吸收光谱  叶绿素a  秦皇岛外海
DOI:10.11693/hyhz20230700143
分类号:
基金项目:国家自然科学基金,42076033号,42106095号。
附件
ABSORPTION SPECTRUM OF PARTICULATE MATTER IN LOW-OXYGEN AREA OFF THE QINHUANGDAO
YU Lian-Tao1, ZHANG Gui-Cheng2, YANG Wei1, ZHAO Liang2, LI Meng-Ting1, SONG Gui-Sheng1
1.Tianjin Key Laboratory for Marine Environmental Research and Service, School of Marine Science and Technology, Tianjin University, Tianjin 300072, China;2.College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, China
Abstract:
More and more attention has been paid on the oxygen depletion in the Bohai Sea in recent years. However, the mechanism of deoxygenation has not been well known. We investigated the characterization of the absorption spectra of suspended particles in seawater off Qinhuangdao, Hebei, China. Furthermore, and evaluated the sources and features of organic matter responsible for deoxygenation in bottom water in summer based on the relationships of particulate absorption spectra with the size-based components of chlorophyll a (chl a) and with environment factors. Results show that nano-phytoplankton contributed approximately 80% of total chl a. The absorption spectra of pigment [aph(l)] reflected the major feature of total particulate absorption spectra [ap(l)]in surface water, while that of detritus [ad(l)] was dominant in middle and bottom layers. ap(440) and ad(440) increased from surfac to bottom waters. The size of phytoplankton controlled the absorption efficiency of pigment, i.e., a*ph(440). Therefore, aph(440) could be calculated using multiple regression based on Chl a concentrations of three phytoplankton size classes. The characters of ad(l) were also influenced by the phytoplankton community and the relative abundance of organic detritus. This study revealed that nano-sized organic particles produced during primary production were the main substrates of deoxygenation in summer in Bohai Sea.
Key words:  particles  absorption spectra  chlorophyll a  offshore of Qinhuangdao
版权所有 海洋与湖沼 Oceanologia et Limnlolgia Sinica Copyright©2008 All Rights Reserved
主管单位:中国科协技术协会 主办单位:中国海洋湖沼学会
地址:青岛市海军路88号  邮编:266400  电话:0532-82898753  E-mail:ols@qdio.ac.cn
技术支持:北京勤云科技发展有限公司