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Variability of black carbon deposition to the east antarctic plateau, 1800-2000 ad
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Edwards, R. Isaksson, E. Bisiaux, M. M. Penner, J. E. Neumann, T. A. Albert, M. R. McConnell, J. R. Anschutz, H. |
| Copyright Year | 2012 |
| Description | Refractory black carbon aerosols (rBC) from biomass burning and fossil fuel combustion are deposited to the Antarctic ice sheet and preserve a history of emissions and long-range transport from low- and mid-latitudes. Antarctic ice core rBC records may thus provide information with respect to past combustion aerosol emissions and atmospheric circulation. Here, we present six East Antarctic ice core records of rBC concentrations and fluxes covering the last two centuries with approximately annual resolution (cal. yr. 1800 to 2000). The ice cores were drilled in disparate regions of the high East Antarctic ice sheet, at different elevations and net snow accumulation rates. Annual rBC concentrations were log-normally distributed and geometric means of annual concentrations ranged from 0.10 to 0.18 m cro-g/kg. Average rBC fluxes were determined over the time periods 1800 to 2000 and 1963 to 2000 and ranged from 3.4 to 15.5 m /a and 3.6 to 21.8 micro-g/sq m/a, respectively. Geometric mean concentrations spanning 1800 to 2000 increased linearly with elevation at a rate of 0.025 micro-g/kg/500 m. Spectral analysis of the records revealed significant decadal-scale variability, which at several sites was comparable to decadal ENSO variability. |
| File Size | 1758326 |
| Page Count | 10 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20120010621 |
| Archival Resource Key | ark:/13960/t6644r09n |
| Language | English |
| Publisher Date | 2012-04-26 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Fuel Combustion Atmospheric Circulation Southern Oscillation Biomass Burning Spectrum Analysis Aerosols Combustion Products Ice Fossil Fuels Periodic Variations Refractories Carbon Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
