Deposition rate of particulate and dissolved aluminum derived from saharan dust in precipitation at Miami, Florida
作者： Joseph M. Prospero , Ruby T. Nees , Mitsuo Uematsu
关键词: Flux (metallurgy) 、 Atmospheric sciences 、 Environmental science 、 Tropical Atlantic 、 Hydrology 、 Mineral dust 、 Precipitation 、 Aerosol 、 Volume (thermodynamics) 、 Deposition (chemistry) 、 Particulates 、 Earth-Surface Processes 、 Ecology (disciplines) 、 Earth and Planetary Sciences (miscellaneous) 、 Space and Planetary Science 、 Palaeontology 、 Forestry 、 Aquatic science 、 Atmospheric Science 、 Soil science 、 Geochemistry and Petrology 、 Geophysics 、 Oceanography 、 Water Science and Technology
摘要: Precipitation was collected for a I-year period in Miami, Florida. The deposition rate of Al samples containing Saharan dust 10.1 ~g/cm2; this flux is equivalent to mineral 126 ~g/cm2 per year, value comparable the accumulation sediments tropical North Atlantic. Mineral rates rain were highly variable, with 22% total occurring 1 day and 68% 4 days two separate episodes. volume-weighted average concentration dissolved dust-related events 9.8 ~g/L; if normalized volume that fell would have minimum 3.0 ~g/L. fraction (defined as all passes through 0.45-vm filter) ranged from 0.5 48%, mean 5%; solubility tended increase decreasing pH concentration. If 5 % solubili ty applies deposited Atlantic, then annual soluble region be 2-8 x lOll g, commensurate carried by Amazon; on global basis input oceans 20-40 rivers. These atmospheric are sufficient account many distribution features oceans.
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