气候变化领域集成服务门户(CCPortal): Investigating the Nutrient Landscape in a Coastal Upwelling Region and Its Relationship to the Biological Carbon Pump

CCPortal

DOI	10.1029/2020GL087351
	Investigating the Nutrient Landscape in a Coastal Upwelling Region and Its Relationship to the Biological Carbon Pump
	Stukel M.R.; Barbeau K.A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:6
英文摘要	We investigated nutrient patterns and their relationship to vertical carbon export using results from 38 Lagrangian experiments in the California Current Ecosystem. The dominant mode of variability reflected onshore-offshore nutrient gradients. A secondary mode of variability was correlated with silica excess and dissolved iron and likely reflects regional patterns of iron limitation. The biological carbon pump was enhanced in high-nutrient and Fe-stressed regions. Patterns in the nutrient landscape proved to be better predictors of the vertical flux of sinking particles than contemporaneous measurements of net primary production. Our results suggest an important role for Fe-stressed diatoms in vertical carbon flux. They also suggest that either preferential recycling of N or non-Redfieldian nutrient uptake by diatoms may lead to high PO4 3−:NO3 − and Si(OH)4:NO3 − ratios, following export of P- and Si-enriched organic matter. Increased export following Fe stress may partially explain inverse relationships between net primary productivity and export efficiency. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Biogeochemistry; Carbon; Ecosystems; Iron; Nitrates; Offshore oil well production; Phytoplankton; Silica; Silicon; Biological pumps; California Current; Carbon export; Inverse relationship; Lagrangian experiment; Marine biogeochemistries; Net primary production; Net primary productivity; Nutrients; biogeochemistry; biological pump; carbon cycle; chlorine nitrate; iron; marine environment; nitrate; nutrient dynamics; upwelling; Bacillariophyta; Redfieldia
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170566
作者单位	Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, United States; Center for Ocean-Atmospheric Prediction Studies, Florida State University, Tallahassee, FL, United States; Scripps Institution of Oceanography, University of California San Diego, San Diego, CA, United States
推荐引用方式 GB/T 7714	Stukel M.R.,Barbeau K.A.. Investigating the Nutrient Landscape in a Coastal Upwelling Region and Its Relationship to the Biological Carbon Pump[J],2020,47(6).
APA	Stukel M.R.,&Barbeau K.A..(2020).Investigating the Nutrient Landscape in a Coastal Upwelling Region and Its Relationship to the Biological Carbon Pump.Geophysical Research Letters,47(6).
MLA	Stukel M.R.,et al."Investigating the Nutrient Landscape in a Coastal Upwelling Region and Its Relationship to the Biological Carbon Pump".Geophysical Research Letters 47.6(2020).