Effect of wind events on phytoplankton blooms in the Pearl River estuary during summer
Yin, KD; Zhang, JL; Qian, PY; Jian, WJ; Huang, LM; Chen, JF; Wu, MCS; kyin@ust.hk
2004
发表期刊CONTINENTAL SHELF RESEARCH
ISSN0278-4343
卷号24期号:16页码:1909-1923
摘要The Pearl River estuary fuels phytoplankton productivity in the estuarine coastal waters in the oligotrophic South China Sea. Cruises were conducted to investigate the spatial distribution of primary productivity, and two size fractionations (< 5 and > 5 pm) of chlorophyll in the Pearl River estuary and across the coastal plume south of Hong Kong during the season of high river discharge (July, 1999 and 2000). During 18-19 July 1999, phytoplankton biomass and productivity were low in the freshwater dominated estuary (< 20 mg chl am(-2) and < 100 mg Cm-2 d(-1), respectively), and were maximal at the edge of the estuarine coastal plume south of Hong Kong, reaching 70 mg chl am(-2) and 4.2 g Cm-2 d(-1), respectively. Chl a was dominated by the > 5 mum size fractionation (> 50%). The Pearl River estuary displayed a typical spatial variability of phytoplankton biomass: low biomass and productivity due to rapid dilution and light limitation in turbid estuarine waters, a regional maximum of biomass and productivity at intermediate salinities in the coastal plume and low biomass due to nutrient limitation in oceanic waters. In summer when south-southwest monsoonal winds blow, part of the coastal plume moves eastwards. A regional maximum of phytoplankton usually develops in the coastal plume south of Hong Kong. However, a change in wind direction to the east or northeast can cause the following effects: pushing the coastal plume westward to the estuary, holding (retaining) the estuarine plume in the estuary (due to the Coriolis effect) and at the same time, mixing the water column vertically. Such a strong east or northeast wind event was observed during July 22-26 1999 and caused an increase in salinity at the surface in the estuary compared to before the wind event. This wind event increased the residence time of the estuarine plume inside the estuary, and as a result, a phytoplankton bloom (52-151 mg chl am(-2)) developed during July 25-26 inside the estuary. This similar easterly wind effect was observed during July 2000. After a strong easterly wind event (speed 10 ms(-1)) on July 11, the coastal plume was absent in waters south of Hong Kong on July 13, but it returned on July 19 after winds blew from the south and southwest direction. The results suggest that wind events not only changed the spatial movement of the coastal plume, but also the spatial distribution of phytoplankton biomass and productivity in the Pearl River estuary and adjacent coastal waters. (C) 2004 Elsevier Ltd. All rights reserved.
部门归属Hong Kong Univ Sci & Technol, AMCE Program, Dept Biol, Kowloon, Hong Kong, Peoples R China; Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Trop Marine Environm Dynam, Guangzhou, Peoples R China; State Ocean Adm, Inst Oceanog 2, Hangzhou 310012, Peoples R China
关键词Phytoplankton Productivity Chlorophyll Size Fractionation Pearl River Estuary Winds
学科领域Oceanography
URL查看原文
收录类别sci
资助项目LED
WOS记录号WOS:000225183000013
引用统计
被引频次:69[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/5607
专题热带海洋环境国家重点实验室(LTO)
通讯作者kyin@ust.hk
推荐引用方式
GB/T 7714
Yin, KD,Zhang, JL,Qian, PY,et al. Effect of wind events on phytoplankton blooms in the Pearl River estuary during summer[J]. CONTINENTAL SHELF RESEARCH,2004,24(16):1909-1923.
APA Yin, KD.,Zhang, JL.,Qian, PY.,Jian, WJ.,Huang, LM.,...&kyin@ust.hk.(2004).Effect of wind events on phytoplankton blooms in the Pearl River estuary during summer.CONTINENTAL SHELF RESEARCH,24(16),1909-1923.
MLA Yin, KD,et al."Effect of wind events on phytoplankton blooms in the Pearl River estuary during summer".CONTINENTAL SHELF RESEARCH 24.16(2004):1909-1923.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
Effect of wind event(423KB) 开放获取--请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。