YIC-IR  > 中科院海岸带环境过程与生态修复重点实验室
Evolution of satellite derived chlorophyll-a trends in the Bohai and Yellow Seas during 2002-2018: Comparison between linear and nonlinear trends
Wang, Yueqi1,2,3; Tian, Xinpeng1,2,3; Gao, Zhiqiang1,2,3
Source PublicationESTUARINE COASTAL AND SHELF SCIENCE
ISSN0272-7714
2021-09-30
Volume259Pages:17
KeywordLong-term Chl-a trend Linear and nonlinear The Bohai and Yellow seas Remote sensing Eutrophication
DOI10.1016/j.ecss.2021.107449
Corresponding AuthorWang, Yueqi(yueqiwang@yic.ac.cn)
AbstractThe trends of sea surface chlorophyll-a (Chl-a) concentrations in the Bohai and Yellow Seas of China (BYS) were analysed based on the satellite-derived Chl-a dataset from August 2002 to December 2018. The result of linear trend analysis based on the seasonal Mann-Kendall test indicates a significant positive Chl-a trend during this period, with an average trend of similar to 1.15% year 1 (Slope: similar to 0.011 mg year 1). However, the linear trends of Chl-a varied seasonally, with strong and significant increases in spring and summer (about 2% year(-1)), and weak and non-significant increases in winter (lower than 1% year(-1)). The results of the ensemble empirical mode decomposition (EEMD) analysis revealed highly nonlinear and time-varying trends of Chl-a in the BYS, with gradually increased Chl-a during 2002-2011 and decreased Chl-a from 2012 to 2018. The instantaneous rate of Chl-a change was continuously reduced from 2002 to 2018, from a positive value of -2.0% year 1 around the beginning year (2002) to a negative value of approximately 2.0% year 1 around the recent year (2018). The temporal evolution of the Chl-a trend was well in accordance with the changes in nutrient enrichment, suggesting that the status of eutrophication might be the primary driver of the long-term trends in Chl-a. The increase (decrease) in nutrient levels could alleviate (aggravate) the nutrient limitation for phytoplankton growth in spring and summer, thus regulating the changes in Chl-a. In contrast, the Chl-a trend seems to be unrelated to the trend of light intensity in this area. This is the first study aimed to discern and compare the linear and evolutionary nonlinear Chl-a trends in the BYS and provides a baseline against which future changes can be monitored.
Funding OrganizationNational Natural Science Foundation of China ; Open Fund of CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences ; Shandong Province Natural Science Foundation, China ; Key Deployment Project of Center for Ocean Mega-Science, Chinese Academy of Sciences ; Key Research Program of Frontier Science, Chinese Academy of Sciences
Indexed BySCI
Language英语
WOS KeywordOCEAN-COLOR PRODUCTS ; LONG-TERM TRENDS ; CLIMATE-CHANGE ; WATER-QUALITY ; PHYTOPLANKTON DYNAMICS ; INTERANNUAL VARIATIONS ; SURFACE TEMPERATURE ; CHINA SEAS ; VARIABILITY ; MARINE
WOS Research AreaMarine & Freshwater Biology ; Oceanography
WOS IDWOS:000685894100002
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/29653
Collection中科院海岸带环境过程与生态修复重点实验室
中科院海岸带环境过程与生态修复重点实验室_海岸带信息集成与战略规划研究中心
Corresponding AuthorWang, Yueqi
Affiliation1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS Key Lab Coastal Environm Proc & Ecol Remedit, Yantai 264003, Peoples R China
2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Shandong Key Lab Coastal Environm Proc, Yantai 264003, Peoples R China
3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China
Recommended Citation
GB/T 7714
Wang, Yueqi,Tian, Xinpeng,Gao, Zhiqiang. Evolution of satellite derived chlorophyll-a trends in the Bohai and Yellow Seas during 2002-2018: Comparison between linear and nonlinear trends[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2021,259:17.
APA Wang, Yueqi,Tian, Xinpeng,&Gao, Zhiqiang.(2021).Evolution of satellite derived chlorophyll-a trends in the Bohai and Yellow Seas during 2002-2018: Comparison between linear and nonlinear trends.ESTUARINE COASTAL AND SHELF SCIENCE,259,17.
MLA Wang, Yueqi,et al."Evolution of satellite derived chlorophyll-a trends in the Bohai and Yellow Seas during 2002-2018: Comparison between linear and nonlinear trends".ESTUARINE COASTAL AND SHELF SCIENCE 259(2021):17.
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