气候变化领域集成服务门户(CCPortal): Impact of Changes to the Atmospheric Soluble Iron Deposition Flux on Ocean Biogeochemical Cycles in the Anthropocene

CCPortal

DOI	10.1029/2019GB006448
	Impact of Changes to the Atmospheric Soluble Iron Deposition Flux on Ocean Biogeochemical Cycles in the Anthropocene
	Hamilton D.S.; Moore J.K.; Arneth A.; Bond T.C.; Carslaw K.S.; Hantson S.; Ito A.; Kaplan J.O.; Lindsay K.; Nieradzik L.; Rathod S.D.; Scanza R.A.; Mahowald N.M.
发表日期	2020
ISSN	0886-6236
EISSN	1944-9224
卷号	34 期号:3
英文摘要	Iron can be a growth-limiting nutrient for phytoplankton, modifying rates of net primary production, nitrogen fixation, and carbon export - highlighting the importance of new iron inputs from the atmosphere. The bioavailable iron fraction depends on the emission source and the dissolution during transport. The impacts of anthropogenic combustion and land use change on emissions from industrial, domestic, shipping, desert, and wildfire sources suggest that Northern Hemisphere soluble iron deposition has likely been enhanced between 2% and 68% over the Industrial Era. If policy and climate follow the intermediate Representative Concentration Pathway 4.5 trajectory, then results suggest that Southern Ocean (>30°S) soluble iron deposition would be enhanced between 63% and 95% by 2100. Marine net primary productivity and carbon export within the open ocean are most sensitive to changes in soluble iron deposition in the Southern Hemisphere; this is predominantly driven by fire rather than dust iron sources. Changes in iron deposition cause large perturbations to the marine nitrogen cycle, up to 70% increase in denitrification and 15% increase in nitrogen fixation, but only modestly impacts the carbon cycle and atmospheric CO2 concentrations (1–3 ppm). Regionally, primary productivity increases due to increased iron deposition are often compensated by offsetting decreases downstream corresponding to equivalent changes in the rate of phytoplankton macronutrient uptake, particularly in the equatorial Pacific. These effects are weaker in the Southern Ocean, suggesting that changes in iron deposition in this region dominates the global carbon cycle and climate response. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	biogeochemistry; carbon cycle; iron cycle; marine net primary productivity; nitrogen cycle
语种	英语
scopus关键词	Anthropocene; anthropogenic effect; atmospheric deposition; biogeochemical cycle; biogeochemistry; carbon cycle; flux measurement; iron; land use change; marine environment; net primary production; nitrogen cycle; Northern Hemisphere; nutrient limitation; open ocean; phytoplankton; pollutant source; solute transport; Southern Hemisphere; 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/129657
作者单位	Department of Earth and Atmospheric Science, Cornell University, Ithaca, NY, United States; Department of Earth System Science, University of California, Irvine, CA, United States; Institute of Meteorology and Climate Research/Atmospheric Environmental Research, Karlsruhe Institute of Technology, Garmisch-Partenkirchen, Germany; Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, United States; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Geospatial Data Solutions Center, University of California, Irvine, CA, United States; Yokohama Institute for Earth Sciences, JAMSTEC, Yokohama, Japan; Department of Earth Sciences, The University of Hong Kong, Hong Kong; National Center for Atmospheric Research, Boulder, CO, United States; Institute for Physical Geography and Ecosystem Sciences, Lund University, Lund, Sweden; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Atmospheric Sciences and Global Change ...
推荐引用方式 GB/T 7714	Hamilton D.S.,Moore J.K.,Arneth A.,et al. Impact of Changes to the Atmospheric Soluble Iron Deposition Flux on Ocean Biogeochemical Cycles in the Anthropocene[J],2020,34(3).
APA	Hamilton D.S..,Moore J.K..,Arneth A..,Bond T.C..,Carslaw K.S..,...&Mahowald N.M..(2020).Impact of Changes to the Atmospheric Soluble Iron Deposition Flux on Ocean Biogeochemical Cycles in the Anthropocene.Global Biogeochemical Cycles,34(3).
MLA	Hamilton D.S.,et al."Impact of Changes to the Atmospheric Soluble Iron Deposition Flux on Ocean Biogeochemical Cycles in the Anthropocene".Global Biogeochemical Cycles 34.3(2020).