DOI: 10.1029/2018GB005880
论文题名: The Effect of Atmospheric Acid Processing on the Global Deposition of Bioavailable Phosphorus From Dust
作者: Herbert R.J. ; Krom M.D. ; Carslaw K.S. ; Stockdale A. ; Mortimer R.J.G. ; Benning L.G. ; Pringle K. ; Browse J.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2018
卷: 32, 期: 9 语种: 英语
英文关键词: 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)
学科: acid processing
; biogeochemistry
; global modeling
; mineral dust
; oceans
; phosphorus
中文摘要: 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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160199
Appears in Collections: 气候变化与战略
There are no files associated with this item.
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
Recommended Citation:
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]. Global Biogeochemical Cycles,2018-01-01,32(9)