DOI: 10.1002/gbc.20062
Scopus记录号: 2-s2.0-84881502453
论文题名: Estimation of atmospheric nutrient inputs to the Atlantic Ocean from 50°N to 50°S based on large-scale field sampling: Iron and other dust-associated elements
作者: Baker A ; R ; , Adams C ; , Bell T ; G ; , Jickells T ; D ; , Ganzeveld L
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 3 起始页码: 755
结束页码: 767
语种: 英语
英文关键词: aluminum
; Atlantic
; atmospheric dust
; iron
; manganese
; wet and dry deposition
Scopus关键词: Atlantic
; Atmospheric dust
; Intertropical convergence zone
; Large-scale research
; Marine carbon cycle
; Relative contribution
; Sources of uncertainty
; Wet and dry
; Aerosols
; Aluminum
; Aluminum coatings
; Atmospheric chemistry
; Deposition
; Dust
; Estimation
; Iron
; Manganese
; Rain
; Solubility
; Iron research
; air-sea interaction
; atmospheric deposition
; carbon cycle
; dust
; estimation method
; heterogeneity
; monitoring
; solubilization
; trace element
; trace metal
; Atlantic Ocean
英文摘要: Atmospheric inputs of mineral dust supply iron and other trace metals to the remote ocean and can influence the marine carbon cycle due to iron's role as a potentially limiting micronutrient. Dust generation, transport, and deposition are highly heterogeneous, and there are very few remote marine locations where dust concentrations and chemistry (e.g., iron solubility) are routinely monitored. Here we use aerosol and rainwater samples collected during 10 large-scale research cruises to estimate the atmospheric input of iron, aluminum, and manganese to four broad regions of the Atlantic Ocean over two 3 month periods for the years 2001-2005. We estimate total inputs of these metals to our study regions to be 4.2, 17, and 0.27 Gmol in April-June and 4.9, 14, and 0.19 Gmol in September-November, respectively. Inputs were highest in regions of high rainfall (the intertropical convergence zone and South Atlantic storm track), and rainfall contributed higher proportions of total input to wetter regions. By combining input estimates for total and soluble metals for these time periods, we calculated overall percentage solubilities for each metal that account for the contributions from both wet and dry depositions and the relative contributions from different aerosol types. Calculated solubilities were in the range 2.4%-9.1% for iron, 6.1%-15% for aluminum, and 54%-73% for manganese. We discuss sources of uncertainty in our estimates and compare our results to some recent estimates of atmospheric iron input to the Atlantic. Key Points3-monthly total Fe inputs for the Atlantic are in general agreement with modelsBroad-scale Fe solubility appears to be higher than those derived from modelsInput from wet deposition varies significantly according to rainfall rate ©2013. 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/77588
Appears in Collections: 气候变化事实与影响
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作者单位: Laboratory for Global Marine and Atmospheric Chemistry, School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, United Kingdom; Now at Plymouth Marine Laboratory, Plymouth, United Kingdom; Department of Environmental Sciences, Wageningen University and Research Centre, Wageningen, Netherlands
Recommended Citation:
Baker A,R,, Adams C,et al. Estimation of atmospheric nutrient inputs to the Atlantic Ocean from 50°N to 50°S based on large-scale field sampling: Iron and other dust-associated elements[J]. Global Biogeochemical Cycles,2013-01-01,27(3)