气候变化领域集成服务门户(CCPortal): Global Spatial and Temporal Variation of Cd:P in Euphotic Zone Particulates

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DOI	10.1029/2017GB005842
	Global Spatial and Temporal Variation of Cd:P in Euphotic Zone Particulates
	Bourne H.L.; Bishop J.K.B.; Lam P.J.; Ohnemus D.C.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	1123
结束页码	1141
卷号	32 期号:7
英文摘要	Concentrations of Cd and P were determined in particle samples collected using the multiple unit large volume in situ filtration system (MULVFS) from 50 profiles at 34 different locations throughout the Atlantic, Pacific, and Southern Oceans since 1991. Consistent methodology has been used. This data set of Cd:P in size fractionated particles gives insight into the processes that lead to differences in regional Cd:P particle values as well as how the formation and remineralization of these particles lead to dissolved deep water ratios that increase from the North Atlantic to the North Pacific. With large spatial and temporal variation, this data set allows us to study the effects of an El Niño, upwelling, large-scale in situ Fe fertilization, low-oxygen conditions, and seasonal variation on the Cd:P in particles. Overall, Cd:P tends to be higher (~1–2 mmol/mol) in particles gathered in biologically dynamic waters and is much lower (typically ~0.1 mmol/mol) in oligotrophic regions. Using multiple linear regression analysis, we investigate how euphotic zone parameters important to photosynthesis including nitrate, phosphate, silicate, temperature, and euphotic zone depth affect the Cd:P ratio in particles. Using the results of the analysis, we create global seasonal maps of predicted particulate Cd:P distributions. We find that three factors—local dissolved nitrate, silicate concentrations, and euphotic zone depth—can predict 59% of the variation in particulate Cd:P. We verified our projections using in situ filtration samples collected during GEOTRACES expeditions GA03 (North Atlantic) and GP16 (South Pacific). ©2018. American Geophysical Union. All Rights Reserved.
英文关键词	cadmium in marine particles; particle Cd:P variation in modern surface waters; remineralization differences between Cd and P
语种	英语
scopus关键词	cadmium; concentration (composition); data set; El Nino; euphotic zone; particulate matter; phosphorus; photosynthesis; remineralization; seasonal variation; soil profile; spatial variation; surface water; temporal variation; upwelling; Atlantic Ocean; Atlantic Ocean (North); Pacific Ocean; Pacific Ocean (North); Pacific Ocean (South); Southern Ocean
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129809
作者单位	Department of Earth and Planetary Science, University of California, Berkeley, CA, United States; Earth and Environmental Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Ocean Sciences Department, University of California, Berkeley, CA, United States; Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, United States
推荐引用方式 GB/T 7714	Bourne H.L.,Bishop J.K.B.,Lam P.J.,et al. Global Spatial and Temporal Variation of Cd:P in Euphotic Zone Particulates[J],2018,32(7).
APA	Bourne H.L.,Bishop J.K.B.,Lam P.J.,&Ohnemus D.C..(2018).Global Spatial and Temporal Variation of Cd:P in Euphotic Zone Particulates.Global Biogeochemical Cycles,32(7).
MLA	Bourne H.L.,et al."Global Spatial and Temporal Variation of Cd:P in Euphotic Zone Particulates".Global Biogeochemical Cycles 32.7(2018).