Spatiotemporal Patterns and Environmental Drivers of Particulate Inorganic Carbon (PIC) Variability in the Southern Waters of Sumatra-Java Islands

doi:10.1029/2023JC020712

IOCAS-IR > 海洋环流与波动重点实验室

	Spatiotemporal Patterns and Environmental Drivers of Particulate Inorganic Carbon (PIC) Variability in the Southern Waters of Sumatra-Java Islands
	Zhao, Meihan1,2,3 ; Wang, Zhenyan 1,2,3,4; Song, Xinling 1,2; Jia, Yijia 1,2,3; Fu, Yujie 1,2,5
	2024-05-01
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN	2169-9275
卷号	129 期号:5 页码:21
通讯作者	Wang, Zhenyan(zywang@qdio.ac.cn)
摘要	The southern waters of the Sumatra-Java Islands, within the Indo-Pacific Warm Pool, are highly susceptible to global climate change impacts. Understanding particulate inorganic carbon (PIC) dynamics and environmental responses in this region is critical for assessing climate change effects on marine ecosystems. Utilizing two decades of remote sensing PIC data (2003-2022), we identified five sub-regions via K-means clustering: the Sunda Strait, southern coastal/offshore waters of Sumatra Island, and southern coastal/offshore waters of Java Island. Self-Organizing Map explored interannual PIC variations, while Generalized Additive Models delineated driving factors. In the Sunda Strait, PIC dynamics are influenced by water exchanges between the Indonesian Seas (ISs) and eastern Indian Ocean (EIO). Seasonally, PIC concentrations peak during the east monsoon (boreal summer); decreasing during positive Indian Ocean Dipole (+IOD) and El Ni & ntilde;o events. Along the southern Sumatra, PIC variations positively correlate with rainfall and photosynthetically active radiation (PAR). Along the southern Sumatra, upwelling drives PIC variations, with higher concentrations during mature summer monsoon induced upwelling periods. PIC increases during +IOD and decreases during El Ni & ntilde;o. Our study highlights the nexus between nutrients, physical factors (e.g., rainfall), and climatic events (e.g., El Ni & ntilde;o) on PIC concentrations. Climate-induced changes in oceanic physical processes modulate nutrient concentrations, thereby governing PIC variations. We propose a mechanistic model to elucidate PIC variations in upwelling areas. Findings suggest that prospective climate variability, encompassing alterations in climate events, rainfall, and temperature, may escalate PIC concentrations within the study area, advocating PIC as a forward-looking climate change indicator. Understanding the response of particulate inorganic carbon (PIC)-a primary form of oceanic carbon - to environmental changes in the vulnerable southern waters of the Sumatra-Java Islands is crucial for assessing the marine ecosystem. We used satellite image data to examine the variability of PIC, from 2003 to 2022. Our research showed that PIC concentrations varied across the area. In the Sunda Strait, a narrow body of water between land masses, water movement between the Indonesian Seas and eastern Indian Ocean influences PIC concentrations. In the southern waters of Sumatra Island, we discovered that increased rainfall and sunlight contribute to higher PIC concentrations. In the southern waters of Java Island, upwelling, an ocean physical process that brings nutrient-rich water to the surface, plays a significant role. Our study delineates the interplay between nutrients, physical factors (e.g., rainfall), and climatic events (e.g., El Ni & ntilde;o) on coccolithophore biomass. Climate changes drive alterations in oceanic physical processes, which in turn affect nutrient availability, thereby governing the growth of coccolithophores. Findings suggest prospective climate variability, inclusive of alterations in climate events, rainfall, and temperature, may escalate PIC concentrations within the study area, advocating PIC concentrations alterations as a forward-looking climate change indicator. Climate alters oceanic physical processes, thereby modulating nutrient availability, which in turn directly governs Particulate Inorganic Carbon (PIC) variations A 20-year analysis identified three core mechanisms driving PIC spatiotemporal variations in the study area Rising PIC under future climates predicts higher carbon sedimentation rates, marking PIC as a key climate indicator
关键词	Particulate Inorganic Carbon (PIC) coccolithophore spatiotemporal variability environmental drivers climate change Sumatra-Java Islands
DOI	10.1029/2023JC020712
收录类别	SCI
语种	英语
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation[42176090] ; [XDB42010203]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:001216201700001
出版者	AMER GEOPHYSICAL UNION
WOS关键词	COASTAL UPWELLING SYSTEM ; WESTERN PACIFIC-OCEAN ; LIVING COCCOLITHOPHORES ; CHLOROPHYLL-A ; INDIAN-OCEAN ; SUNDA STRAIT ; CALCIFICATION ; PHYTOPLANKTON ; BLOOM ; PHOTOSYNTHESIS
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/185708
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.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Observat & Forecasting, Qingdao, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Qingdao Marine Sci & Technol Ctr, Lab Marine Mineral Resources, Qingdao, Peoples R China 5.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao, 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	Zhao, Meihan,Wang, Zhenyan,Song, Xinling,et al. Spatiotemporal Patterns and Environmental Drivers of Particulate Inorganic Carbon (PIC) Variability in the Southern Waters of Sumatra-Java Islands[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2024,129(5):21.
APA	Zhao, Meihan,Wang, Zhenyan,Song, Xinling,Jia, Yijia,&Fu, Yujie.(2024).Spatiotemporal Patterns and Environmental Drivers of Particulate Inorganic Carbon (PIC) Variability in the Southern Waters of Sumatra-Java Islands.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,129(5),21.
MLA	Zhao, Meihan,et al."Spatiotemporal Patterns and Environmental Drivers of Particulate Inorganic Carbon (PIC) Variability in the Southern Waters of Sumatra-Java Islands".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 129.5(2024):21.