气候变化领域集成服务门户(CCPortal): Global ocean primary production trends in the modern ocean color satellite record (1998-2015)

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DOI	10.1088/1748-9326/ab4667
	Global ocean primary production trends in the modern ocean color satellite record (1998-2015)
	Gregg W.W.; Rousseaux C.S.
发表日期	2019
ISSN	17489318
卷号	14 期号:12
英文摘要	Ocean primary production (PP), representing the uptake of inorganic carbon through photosynthesis, supports marine life and affects carbon exchange with the atmosphere. It is difficult to ascertain its magnitude, variability, and trends due to our inability to measure it directly at large scales. Yet it is paramount for understanding changes in marine health, fisheries, and the global carbon cycle. Using assimilation of ocean color satellite data into an ocean biogeochemical model, we estimate that global net ocean PP has experienced a small but significant decline -0.8 PgC y-1 (-2.1%) decade-1 (P < 0.05) in the 18-year satellite record from 1998 to 2015. This decline is associated with shallowing surface mixed layer depth (-2.4% decade-1) and decreasing nitrate concentrations (-3.2% decade-1). Relative contributions to PP by various types of ocean phytoplankton have changed, with decreases in production by intermediate-sized phytoplankton represented by chlorophytes (-14.3% decade-1). This is partially compensated by increases from the unique, more nutrient-efficient, coccolithophores (8.4% decade-1). Geographically, the North and Equatorial Indian Oceans are responsible for much of the decline in PP, falling 0.16 and 0.69 PgC y-1 decade-1, respectively. Reduced production by large, fast-growing diatoms along with chlorophytes characterizes the decline here. In contrast, increases in PP are found in the North and North Central Pacific. The increases here are led by chlorophytes in the North Pacific and the small cyanobacteria in the North Central Pacific. These results suggest that the multi-decadal satellite observational record, coupled with an underlying representation of marine biodiversity in a model, can monitor the uptake of carbon by phytoplankton and that changes, although small, are occurring in the global oceans. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	data assimilation; ocean; primary production; trends
语种	英语
scopus关键词	Biodiversity; Carbon; Phytoplankton; Small satellites; Biogeochemical modeling; Data assimilation; Equatorial Indian Ocean; ocean; Ocean primary production; Ocean-color satellites; Primary production; trends; Oceanography; biogeochemistry; carbon cycle; coccolith; data assimilation; gas exchange; inorganic carbon; mixed layer; ocean color; photosynthesis; phytoplankton; primary production; satellite data; surface layer; trend analysis; Pacific Ocean; Pacific Ocean (Central); Pacific Ocean (North); Bacillariophyta; Chlorophyta; Cyanobacteria; Haptophyceae
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154323
作者单位	NASA Global Modeling and Assimilation Office, Goddard Space Flight Center, Greenbelt, MD 20771, United States; NASA Global Modeling and Assimilation Office, Universities Space Research Association, Columbia, MD, United States
推荐引用方式 GB/T 7714	Gregg W.W.,Rousseaux C.S.. Global ocean primary production trends in the modern ocean color satellite record (1998-2015)[J],2019,14(12).
APA	Gregg W.W.,&Rousseaux C.S..(2019).Global ocean primary production trends in the modern ocean color satellite record (1998-2015).Environmental Research Letters,14(12).
MLA	Gregg W.W.,et al."Global ocean primary production trends in the modern ocean color satellite record (1998-2015)".Environmental Research Letters 14.12(2019).