首页 | 本学科首页   官方微博 | 高级检索  
     检索      

南海东北部叶绿素a浓度对台风“风泵”和黑潮共同作用的响应
引用本文:刘宇鹏,唐丹玲,梁文钊.南海东北部叶绿素a浓度对台风“风泵”和黑潮共同作用的响应[J].海洋学报,2020,42(7):16-31.
作者姓名:刘宇鹏  唐丹玲  梁文钊
作者单位:1.中国科学院南海海洋研究所 热带海洋环境国家重点实验室/广东省海洋遥感重点实验室,广东 广州 510301
基金项目:国家自然科学基金;中国科学院重点部署项目;世纪海上丝绸之路协同创新中心海洋环境科学项目;中国科学院国际伙伴计划-对外合作重点项目;国家科技重大专项;广东省科技厅项目;中国科学院项目(非规范项目)
摘    要:南海东北部是寡营养海域,夏季浮游植物叶绿素浓度较低,热带气旋“风泵”效应带来的上层海洋扰动可能引起表层浮游植物的显著增长。以往的研究通常关注热带气旋风应力和海洋中尺度涡对上层海洋浮游植物的影响,本文利用航次CTD、实测叶绿素a浓度、Argo温盐剖面和遥感数据,探讨了台风“风泵”和黑潮共同作用下真光层内浮游植物的变化特征及其成因。结果表明,2015年台风“莲花”过境1周后产生向吕宋海峡西北侧南海海域(A区)入侵的黑潮流套,该入侵的黑潮流套使台风前原有的气旋涡消失,抑制了台风产生的上升流对表层(0~40 m)营养盐供给,使次表层(60~90 m)营养盐富集,进而抑制了表层的叶绿素a增长,促进了次表层叶绿素a的增长;吕宋海峡西侧南海海域(B区)表层的浮游植物叶绿素a浓度增加不仅是源于叶绿素最大层浮游植物的向上输运,更是由于浮游植物的繁殖增长;A区台风引起的流套式的黑潮入侵,促进了B区台风后气旋式流场的形成,产生的持续增强的气旋涡为B区表层叶绿素持续增长提供了充足的营养盐供给。

关 键 词:叶绿素a浓度    台风“风泵”    黑潮    南海东北部    海洋遥感    气旋涡
收稿时间:2019/5/21 0:00:00
修稿时间:2019/9/27 0:00:00

Chlorophyll a concentration response to the typhoon “wind pump” and the Kuroshio in the northeastern South China Sea
Liu Yupeng,Tang Danling,Liang Wenzhao.Chlorophyll a concentration response to the typhoon “wind pump” and the Kuroshio in the northeastern South China Sea[J].Acta Oceanologica Sinica (in Chinese),2020,42(7):16-31.
Authors:Liu Yupeng  Tang Danling  Liang Wenzhao
Institution:1.State Key Laboratory of Tropical Oceanography/Guangdong Province Key Laboratory of Ocean Remote Sensing, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China2.Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou), Guangzhou 511458, China3.University of Chinese Academy of Sciences, Beijing 100049, China4.Department of Earth Sciences, The University of Hong Kong, Hong Kong 999077, China
Abstract:The northeastern South China Sea is oligotrophic. In summer, the northeastern South China Sea is low in phytoplankton chlorophyll a (Chl a) concentration, and the typhoon “wind pump” induced upper ocean turbulence can transport nutrients upwards, and therefore increase the Chl a concentration in the surface and subsurface layers. Previous studies have generally focused on the effects of tropical cyclonic wind stress and ocean mesoscale eddies on the Chl a concentration in the upper ocean. This study investigates the possible effect of the Kuroshio to the Chl a concentration in the euphotic layer after typhoon using CTD data, in situ Chl a concentration, Argo profiles and remote sensing data. The results show that the Typhoon Linfa in 2015 caused a looping path of the Kuroshio intrusion into the South China Sea (Area A) through the northwestern Luzon Strait, which weakened the pre-existing cyclonic eddy after the typhoon. This typhoon “wind pump” enhanced Kuroshio inhibited the uplift of nutrients to the surface layer (0?40 m) through the typhoon Ekman Pumping, and accumulated the nutrient in the subsurface layer (60?90 m), thereby inhibiting the increase of surface Chl a concentration but promoting the growth of subsurface Chl a concentration. The increase of Chl a concentration over the western Luzon in the South China Sea (Area B) was not only the vertical redistribution of the phytoplankton, but especially the growth of the phytoplankton. The typhoon-induced looping path of Kuroshio over the northwestern Luzon promoted the formation of the cyclonic eddy over the western Luzon. This continuously enhancing cyclonic eddy provided sufficient nutrients for the significant increase of the chlorophyll in the surface layer (0?40 m).
Keywords:
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《海洋学报》浏览原始摘要信息
点击此处可从《海洋学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号