Factors influencing the variation of the Sepik-Ramu River system's sediment plume off the north coast of New Guinea

doi:10.1016/j.ecss.2024.108782

IOCAS-IR > 海洋环流与波动重点实验室

	Factors influencing the variation of the Sepik-Ramu River system's sediment plume off the north coast of New Guinea
	Fu, Yujie 1,2,3; Wang, Zhenyan 1,2,3,5; Zhao, Meihan4 ; Song, Xinling 4; Jia, Yijia 4; Song, Zhaojun 1,2,3
	2024-08-01
发表期刊	ESTUARINE COASTAL AND SHELF SCIENCE
ISSN	0272-7714
卷号	303 页码:14
通讯作者	Wang, Zhenyan([email protected])
摘要	The Sepik-Ramu River system (SRRs) is a principal contributor of terrestrial materials to the pelagic waters of the tropical Western Pacific, boasting the highest sediment discharge in New Guinea. However, this system's sediment outflow and dispersal patterns are not well-documented. This study seeks to address this gap by analyzing the estuarine sediment plumes, which are the key indicators of the marine dispersion of terrestrial materials. Utilizing Moderate Resolution Imaging Spectroradiometer (MODIS) images from 2010 to 2020 and applying the Novoa17 algorithm, we examined the distribution and temporal evolution of the sediment plume of the SRRs estuary. The sediment plume was categorized into two distinct zones: core and diffuse, based on suspended sediment concentration (SSC) levels. Our findings reveal significant seasonal variations of these sediment plumes in the nearshore. The plume area expands during the wet season and contracts during the dry season, respectively, with core and diffuse plumes sharing similar change characteristics. The diffuse plume primarily extends northeast in the wet season and subsequently shifts northwest in the dry season, and the core plume consistently points to the northeast. The study further explores the driving factors and mechanisms behind these patterns, identifying river discharge as the primary influence on the core plume and sea surface winds and coastal currents as determinants of the diffuse plume's behavior. Interannual variations in the plume characteristics were found to be influenced by the El Nino-Southern Oscillation (ENSO), which indirectly affects plume dynamics through its impact on regional precipitation. During El Nino events, characterized by drier conditions and reduced discharge, the plume SSC and area typically decrease. During La Nina events, the plume's SSC and area typically increase, except for the 2011 super La Nina's negative anomaly, caused by the rain belt's excessive westward shift.
关键词	Sepik-Ramu river Sediment plume Remote sensing ENSO
DOI	10.1016/j.ecss.2024.108782
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation[42176090]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42010203]; National Aeronautics and Space Administration (NASA)
WOS研究方向	Marine & Freshwater Biology ; Oceanography
WOS类目	Marine & Freshwater Biology ; Oceanography
WOS记录号	WOS:001265847400001
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
WOS关键词	PAPUA-NEW-GUINEA ; ESTUARINE PLUME ; WESTERN PACIFIC ; IN-SITU ; OCEAN ; DISPERSAL ; TRANSPORT ; DISCHARGE ; IMPACT ; WATER
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/186282
专题	海洋环流与波动重点实验室海洋地质与环境重点实验室
通讯作者	Wang, Zhenyan
作者单位	1.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Observat & Forecasting, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 4.Qingdao Marine Sci & Technol Ctr, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Fu, Yujie,Wang, Zhenyan,Zhao, Meihan,et al. Factors influencing the variation of the Sepik-Ramu River system's sediment plume off the north coast of New Guinea[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2024,303:14.
APA	Fu, Yujie,Wang, Zhenyan,Zhao, Meihan,Song, Xinling,Jia, Yijia,&Song, Zhaojun.(2024).Factors influencing the variation of the Sepik-Ramu River system's sediment plume off the north coast of New Guinea.ESTUARINE COASTAL AND SHELF SCIENCE,303,14.
MLA	Fu, Yujie,et al."Factors influencing the variation of the Sepik-Ramu River system's sediment plume off the north coast of New Guinea".ESTUARINE COASTAL AND SHELF SCIENCE 303(2024):14.