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Main factors dominating the development, formation and dissipation of hypoxia off the Changjiang Estuary (CE) and its adjacent waters, China
Chi, Lianbao1,2,4; Song, Xiuxian1,2,3,4; Yuan, Yongquan1,2,4; Wang, Wentao1,2,4; Cao, Xihua1,2,4; Wu, Zaixing1,2,4; Yu, Zhiming1,2,3,4
2020-10-01
发表期刊ENVIRONMENTAL POLLUTION
ISSN0269-7491
卷号265页码:14
通讯作者Song, Xiuxian(songxx@qdio.ac.cn)
摘要Hypoxia off the Changjiang Estuary (CE) and its adjacent waters is purported to be the most severe in China, attracting considerable concern from both the scientific community and the general public. Currently, continuous observations of dissolved oxygen (DO) levels covering hypoxia from its appearance to disappearance are lacking. In this study, twelve consecutive monthly cruises (from February 2015 to January 2016) were conducted. The consecutive spatiotemporal variations in hypoxia throughout the annual cycle were elucidated in detail, and the responses of annual variations in hypoxia to the different influential factors were explored. Overall, hypoxia experienced a consecutive process of expanding from south to north, then disappearing from north to south. The annual variations in hypoxia were mainly contingent on stratification variations. Among different stages, there was significant heterogeneity in the dominant factors. Specifically, low-DO waters initially appeared from the intrusion of nearshore Kuroshio branch current (NKBC), as NKBC intrusion provided a low-DO background and triggered stratification. Thereafter, stratification was enhanced and gradually expanded northward, which promoted the extension of low-DO areas. The formation of hypoxia was regionally selective, and more intense organic matter decomposition at local regions facilitated the occurrence and discontinuous distribution of hypoxia. Hypoxic zones were observed at the Changjiang bank and Zhejiang coastal region from August (most extensively at 14,800 km(2)) to October. Thereafter, increased vertical mixing facilitated the dissipation of hypoxia from north to south. (C) 2020 Elsevier Ltd. All rights reserved.
关键词Hypoxia Annual variations Changjiang Estuary Stratification Nearshore Kuroshio branch current
DOI10.1016/j.envpol.2020.115066
收录类别SCI
语种英语
资助项目Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao)[2018SDKJ0504-2] ; Taishan Scholars Climbing Program of Shandong Province of 2019 ; AoShan Talents Cultivation Program by Qingdao National Laboratory for Marine Science and Technology[2017ASTCP-OS16]
WOS研究方向Environmental Sciences & Ecology
WOS类目Environmental Sciences
WOS记录号WOS:000564562000014
出版者ELSEVIER SCI LTD
引用统计
被引频次:28[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/168526
专题海洋生态与环境科学重点实验室
通讯作者Song, Xiuxian
作者单位1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China
第一作者单位海洋生态与环境科学重点实验室;  中国科学院海洋大科学研究中心
通讯作者单位海洋生态与环境科学重点实验室;  中国科学院海洋大科学研究中心
推荐引用方式
GB/T 7714
Chi, Lianbao,Song, Xiuxian,Yuan, Yongquan,et al. Main factors dominating the development, formation and dissipation of hypoxia off the Changjiang Estuary (CE) and its adjacent waters, China[J]. ENVIRONMENTAL POLLUTION,2020,265:14.
APA Chi, Lianbao.,Song, Xiuxian.,Yuan, Yongquan.,Wang, Wentao.,Cao, Xihua.,...&Yu, Zhiming.(2020).Main factors dominating the development, formation and dissipation of hypoxia off the Changjiang Estuary (CE) and its adjacent waters, China.ENVIRONMENTAL POLLUTION,265,14.
MLA Chi, Lianbao,et al."Main factors dominating the development, formation and dissipation of hypoxia off the Changjiang Estuary (CE) and its adjacent waters, China".ENVIRONMENTAL POLLUTION 265(2020):14.
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