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Article

Response of Total Suspended Sediment and Chlorophyll-a Concentration to Late Autumn Typhoon Events in the Northwestern South China Sea

1
Laboratory of Coastal Ocean Variation and Disaster Prediction, College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524088, China
2
Key Laboratory of Climate, Sources and Environments in Continent Shelf Sea and Deep Ocean, Zhanjiang 524088, China
3
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
4
Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD 20742, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Jorge Vazquez
Remote Sens. 2021, 13(15), 2863; https://0-doi-org.brum.beds.ac.uk/10.3390/rs13152863
Received: 28 May 2021 / Revised: 14 July 2021 / Accepted: 17 July 2021 / Published: 21 July 2021
(This article belongs to the Special Issue Remote Sensing Applications in Ocean Observation)
Strong typhoon winds enhance turbulent mixing, which induces sediment to resuspend and to promote chlorophyll-a (Chl-a) blooms in the continental shelf areas. In this study, we find limited Chl-a responses to three late autumn typhoons (typhoon Nesat, Mujigae and Khanun) in the northwestern South China Sea (NWSCS) using satellite observations. In climatology, the Chl-a and total suspended sediment (TSS) concentrations are high all year round with higher value in autumn in the offshore area of the NWSCS. After the typhoon passage, the Chl-a concentration increases slightly (23%), while even TSS enhances by 280% on the wide continental shelf of the NWSCS. However, in the southern area, located approximately 100 km from the typhoon tracks, both TSS and Chl-a concentrations increase 160% and 150% after typhoon passage, respectively. In the deeper area, the increased TSS concentration is responsible for the considerable increase of the Chl-a. An empirical analysis is applied to the data, which reveals the TSS and Chl-a processes during typhoon events. The results of this study suggest a different mechanism for Chl-a concentration increase and thus contribute toward further evaluation of typhoon-induced biological responses. View Full-Text
Keywords: total suspended sediment; chlorophyll-a bloom; typhoon; South China Sea; alongshore current total suspended sediment; chlorophyll-a bloom; typhoon; South China Sea; alongshore current
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MDPI and ACS Style

Li, J.; Zheng, H.; Xie, L.; Zheng, Q.; Ling, Z.; Li, M. Response of Total Suspended Sediment and Chlorophyll-a Concentration to Late Autumn Typhoon Events in the Northwestern South China Sea. Remote Sens. 2021, 13, 2863. https://0-doi-org.brum.beds.ac.uk/10.3390/rs13152863

AMA Style

Li J, Zheng H, Xie L, Zheng Q, Ling Z, Li M. Response of Total Suspended Sediment and Chlorophyll-a Concentration to Late Autumn Typhoon Events in the Northwestern South China Sea. Remote Sensing. 2021; 13(15):2863. https://0-doi-org.brum.beds.ac.uk/10.3390/rs13152863

Chicago/Turabian Style

Li, Junyi, Huiyuan Zheng, Lingling Xie, Quanan Zheng, Zheng Ling, and Min Li. 2021. "Response of Total Suspended Sediment and Chlorophyll-a Concentration to Late Autumn Typhoon Events in the Northwestern South China Sea" Remote Sensing 13, no. 15: 2863. https://0-doi-org.brum.beds.ac.uk/10.3390/rs13152863

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