Sources, transport and deposition of iron in the global atmosphere
Wang, Rong (Laboratoire des Sciences du Climat et de l'Environment)
Balkanski, Yves (Laboratoire des Sciences du Climat et de l'Environment)
Boucher, Olivier (Université de Paris VII. Laboratoire de Météorologie Dynamique)
Bopp, Laurent (Laboratoire des Sciences du Climat et de l'Environnement)
Chappell, A. (CSIRO Land and Water National Research Flagship)
Ciais, Philippe (Laboratoire des Sciences du Climat et de l'Environment)
Hauglustaine, Didier (Laboratoire des Sciences du Climat et de l'Environment)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Tao, Shu (Sino-French Institute for Earth System Science)

Data:	2015
Resum:	Atmospheric deposition of iron (Fe) plays an important role in controlling oceanic primary productivity. However, the sources of Fe in the atmosphere are not well understood. In particular, the combustion sources of Fe and the subsequent deposition to the oceans have been accounted for in only few ocean biogeochemical models of the carbon cycle. Here we used a mass-balance method to estimate the emissions of Fe from the combustion of fossil fuels and biomass by accounting for the Fe contents in fuel and the partitioning of Fe during combustion. The emissions of Fe attached to aerosols from combustion sources were estimated by particle size, and their uncertainties were quantified by a Monte Carlo simulation. The emissions of Fe from mineral sources were estimated using the latest soil mineralogical database to date. As a result, the total Fe emissions from combustion averaged for 1960-2007 were estimated to be 5. 3 Tg yr¯¹(90% confidence of 2. 3 to 12. 1). Of these emissions, 1, 27 and 72% were emitted in particles < 1 μm (PM₁), 1-10 μm (PM₁-₁₀), and.
Ajuts:	European Commission 610028 European Commission 628735
Nota:	Altres ajuts: The simulations in this work were performed using DSM-CCRT resources under the GENCI (Grand Equipement National de Calcul Intensif) computer time allocation (grant 2014-t2014012201).
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Iron ; Atmospheric deposition
Publicat a:	Atmospheric chemistry and physics, Vol. 15, no. 11 (2015) , p. 6247-6270, ISSN 1680-7324

DOI: 10.5194/acp-15-6247-2015

24 p, 6.6 MB

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