IOCAS-IR  > 海洋环流与波动重点实验室
Effect of a fast-moving tropical storm Washi on phytoplankton in the northwestern South China Sea
Zhao, Hui1,2; Pan, Jiayi2,3,4; Han, Guoqi5; Devlin, Adam T.2; Zhang, Shuwen1; Hou, Yijun6
2017-04-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
Volume122Issue:4Pages:3404-3416
SubtypeArticle
AbstractTropical cyclones may augment nutrients in the ocean surface layer through mixing, entrainment, and upwelling, triggering phytoplankton blooms in oligotrophic waters such as the South China Sea (SCS). Previous studies focused mainly on responses of marine environments to strong or slow-moving typhoons in the SCS. In this study, we analyze variations of chlorophyll a (Chl a) and oceanic conditions in the continental shelf region east of Hainan Island during the fast-moving tropical storm Washi and investigate its influences on phytoplankton bloom and related dynamic mechanisms. Results indicate that there was significant variation of Chl a concentration in the continental shelf region, with low values (about 0.1 mg m(-3)) before the storm and a 30% increase after the storm. This increase was spatially variable, much larger nearshore than offshore. Power spectral analysis of Acoustic Doppler Current Profiler (ADCP) data at a shelf site near the study region reveals strong near-inertial oscillations (NIOs) in the upper layer, with a period of about 36 h, close to the local inertial period. The NIOs intensified mixing and modified the stratification of the upper layer, inducing uplift of nutrients and Chl a into the mixed layer from below, and leading to surface Chl a increase. The relatively shallow nutricline and thermocline in the continental shelf region before the storm were favorable for upwelling of nutrients and generation of NIOs. Advection of nutrients from enhanced runoff during and after the storm may be responsible for the larger increase of the Chl a nearshore.
KeywordTropical Storm Chlorophyll a Primary Productivity Near-inertial Oscillation Mixing
DOI10.1002/2016JC012286
Indexed BySCI
Language英语
WOS IDWOS:000402139900043
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/136848
Collection海洋环流与波动重点实验室
Affiliation1.Guangdong Ocean Univ, Zhanjiang, Peoples R China
2.Chinese Univ Hong Kong, Inst Space & Earth Informat Sci, Hong Kong, Hong Kong, Peoples R China
3.Chinese Univ Hong Kong, Shenzhen Res Inst, Shenzhen, Peoples R China
4.Nanjing Univ Informat Sci & Technol, Coll Marine Sci, Nanjing, Jiangsu, Peoples R China
5.Fisheries & Oceans Canada, Northwest Atlantic Fisheries Ctr, St John, NF, Canada
6.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Hui,Pan, Jiayi,Han, Guoqi,et al. Effect of a fast-moving tropical storm Washi on phytoplankton in the northwestern South China Sea[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2017,122(4):3404-3416.
APA Zhao, Hui,Pan, Jiayi,Han, Guoqi,Devlin, Adam T.,Zhang, Shuwen,&Hou, Yijun.(2017).Effect of a fast-moving tropical storm Washi on phytoplankton in the northwestern South China Sea.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,122(4),3404-3416.
MLA Zhao, Hui,et al."Effect of a fast-moving tropical storm Washi on phytoplankton in the northwestern South China Sea".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 122.4(2017):3404-3416.
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