气候变化领域集成服务门户(CCPortal): The Effect of Atmospheric Acid Processing on the Global Deposition of Bioavailable Phosphorus From Dust

CCPortal

DOI	10.1029/2018GB005880
	The Effect of Atmospheric Acid Processing on the Global Deposition of Bioavailable Phosphorus From Dust
	Herbert R.J.; Krom M.D.; Carslaw K.S.; Stockdale A.; Mortimer R.J.G.; Benning L.G.; Pringle K.; Browse J.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	1367
结束页码	1385
卷号	32 期号:9
英文摘要	The role of dust as a source of bioavailable phosphorus (Bio-P) is quantified using a new parameterization for apatite dissolution in combination with global soil data maps and a global aerosol transport model. Mineral dust provides 31.2 Gg-P/year of Bio-P to the oceans, with 14.3 Gg-P/year from labile P present in the dust, and an additional 16.9 Gg-P/year from acid dissolution of apatite in the atmosphere, representing an increase of 120%. The North Atlantic, northwest Pacific, and Mediterranean Sea are identified as important sites of Bio-P deposition from mineral dust. The acid dissolution process increases the fraction of total-P that is bioavailable from ~10% globally from the labile pool to 18% in the Atlantic Ocean, 42% in the Pacific Ocean, and 20% in the Indian Ocean, with an ocean global mean value of 22%. Strong seasonal variations, especially in the North Pacific, northwest Atlantic, and Indian Ocean, are driven by large-scale meteorology and pollution sources from industrial and biomass-burning regions. Globally constant values of total-P content and bioavailable fraction used previously do not capture the simulated variability. We find particular sensitivity to the representation of particle-to-particle variability of apatite, which supplies Bio-P through acid-dissolution, and calcium carbonate, which helps to buffer the dissolution process. A modest 10% external mixing results in an increase of Bio-P deposition by 18%. The total Bio-P calculated here (31.2 Gg-P/year) represents a minimum compared to previous estimates due to the relatively low total-P in the global soil map used. ©2018. American Geophysical Union. All Rights Reserved.
英文关键词	acid processing; biogeochemistry; global modeling; mineral dust; oceans; phosphorus
语种	英语
scopus关键词	acid deposition; aerosol; atmosphere-ocean coupling; atmospheric deposition; bioavailability; biogeochemistry; buffering; calcium carbonate; dissolution; dust; environmental effect; phosphorus; source identification; Atlantic Ocean; Atlantic Ocean (North); Atlantic Ocean (Northwest); Mediterranean Sea; Mediterranean Sea (West); Pacific Ocean; Pacific Ocean (Northwest)
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/129795
作者单位	School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Now at Department of Meteorology, University of Reading, Reading, United Kingdom; Now at Morris Kahn Marine Research Station, Department of Marine Biology, Leon H. Charney School of Marine Science, University of Haifa, Haifa, Israel; School of Animal, Rural and Environmental Sciences, Nottingham Trent University, Nottinghamshire, United Kingdom; GFZ German Research Centre for Geosciences, Potsdam, Germany; Department of Earth Sciences, Free University of Berlin, Berlin, Germany; Now at College of Life and Environmental Sciences, University of Exeter, Penryn, United Kingdom
推荐引用方式 GB/T 7714	Herbert R.J.,Krom M.D.,Carslaw K.S.,et al. The Effect of Atmospheric Acid Processing on the Global Deposition of Bioavailable Phosphorus From Dust[J],2018,32(9).
APA	Herbert R.J..,Krom M.D..,Carslaw K.S..,Stockdale A..,Mortimer R.J.G..,...&Browse J..(2018).The Effect of Atmospheric Acid Processing on the Global Deposition of Bioavailable Phosphorus From Dust.Global Biogeochemical Cycles,32(9).
MLA	Herbert R.J.,et al."The Effect of Atmospheric Acid Processing on the Global Deposition of Bioavailable Phosphorus From Dust".Global Biogeochemical Cycles 32.9(2018).