气候变化领域集成服务门户(CCPortal): The Role of External Inputs and Internal Cycling in Shaping the Global Ocean Cobalt Distribution: Insights From the First Cobalt Biogeochemical Model

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DOI	10.1002/2017GB005830
	The Role of External Inputs and Internal Cycling in Shaping the Global Ocean Cobalt Distribution: Insights From the First Cobalt Biogeochemical Model
	Tagliabue A.; Hawco N.J.; Bundy R.M.; Landing W.M.; Milne A.; Morton P.L.; Saito M.A.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	594
结束页码	616
卷号	32 期号:4
英文摘要	Cobalt is an important micronutrient for ocean microbes as it is present in vitamin B12 and is a co-factor in various metalloenzymes that catalyze cellular processes. Moreover, when seawater availability of cobalt is compared to biological demands, cobalt emerges as being depleted in seawater, pointing to a potentially important limiting role. To properly account for the potential biological role for cobalt, there is therefore a need to understand the processes driving the biogeochemical cycling of cobalt and, in particular, the balance between external inputs and internal cycling. To do so, we developed the first cobalt model within a state-of-the-art three-dimensional global ocean biogeochemical model. Overall, our model does a good job in reproducing measurements with a correlation coefficient of >0.7 in the surface and >0.5 at depth. We find that continental margins are the dominant source of cobalt, with a crucial role played by supply under low bottom-water oxygen conditions. The basin-scale distribution of cobalt supplied from margins is facilitated by the activity of manganese-oxidizing bacteria being suppressed under low oxygen and low temperatures, which extends the residence time of cobalt. Overall, we find a residence time of 7 and 250 years in the upper 250 m and global ocean, respectively. Importantly, we find that the dominant internal resupply process switches from regeneration and recycling of particulate cobalt to dissolution of scavenged cobalt between the upper ocean and the ocean interior. Our model highlights key regions of the ocean where biological activity may be most sensitive to cobalt availability. ©2018. The Authors.
英文关键词	biogeochemistry; modeling; trace elements
语种	英语
scopus关键词	bacterium; biogeochemical cycle; biogeochemistry; bottom water; cobalt; continental margin; dissolution; global ocean; nutrient cycling; oxygen; residence time; seawater; spatial distribution; three-dimensional modeling; trace element
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/129841
作者单位	School of Environmental Sciences, University of Liverpool, Liverpool, United Kingdom; MIT-WHOI Joint Program in Oceanography/Applied Ocean Science and Engineering, Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Earth Sciences, University of Southern California, Los Angeles, CA, United States; Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; School of Oceanography, University of Washington, Seattle, WA, United States; Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, United States; School of Geography, Earth and Environmental Sciences, University of Plymouth, Plymouth, United Kingdom; Geochemistry, National High Magnetic Field Laboratory, Tallahassee, FL, United States
推荐引用方式 GB/T 7714	Tagliabue A.,Hawco N.J.,Bundy R.M.,et al. The Role of External Inputs and Internal Cycling in Shaping the Global Ocean Cobalt Distribution: Insights From the First Cobalt Biogeochemical Model[J],2018,32(4).
APA	Tagliabue A..,Hawco N.J..,Bundy R.M..,Landing W.M..,Milne A..,...&Saito M.A..(2018).The Role of External Inputs and Internal Cycling in Shaping the Global Ocean Cobalt Distribution: Insights From the First Cobalt Biogeochemical Model.Global Biogeochemical Cycles,32(4).
MLA	Tagliabue A.,et al."The Role of External Inputs and Internal Cycling in Shaping the Global Ocean Cobalt Distribution: Insights From the First Cobalt Biogeochemical Model".Global Biogeochemical Cycles 32.4(2018).