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Large scale changes in 20th century black carbon deposition to Antarctica
Citation
Bisiaux, MM and Edwards, R and McConnell, JR and Curran, MAJ and van Ommen, TD and Smith, AM and Neumann, TA and Pasteris, DR and Penner, JE and Taylor, K, Large scale changes in 20th century black carbon deposition to Antarctica, Atmospheric Chemistry and Physics Discussions, 11, (10) pp. 27815-27831. ISSN 1680-7367 (2011) [Refereed Article]
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Copyright Statement
Licensed under the Creative Commons Attribution 3.0 Unported (CC BY 3.0) http://creativecommons.org/licenses/by/3.0/
DOI: doi:10.5194/acpd-11-27815-2011
Abstract
Refractory black carbon aerosols (rBC) emitted by biomass burning (fires) and fossil
fuel combustion, affect global climate and atmospheric chemistry. In the Southern
Hemisphere (SH), rBC is transported in the atmosphere from low latitudes to Antarctica
5 and deposited to the polar ice sheet preserving a history of emissions and atmospheric
transport. Here, we present two high-resolution Antarctic rBC ice core records drilled
from the West Antarctic Ice Sheet divide and Law Dome on the periphery of the East
Antarctic ice sheet. Separated by ~3500 km, the records span calendar years 1850-
2001 and reflect the rBC distribution over the Indian and Pacific ocean sectors of the
10 Southern Ocean. Highly correlated over the past 60 yr, the records show that coherent
large-scale changes in SH rBC occurred at decadal to inter-annual time scales, notably
in ENSO-like periodicities. Decadal trends in the records are similar to inventories of
SH rBC emissions from grass fires and biofuels. The combined records suggest a
large-scale reduction in rBC from 1950 to 1990 over the remote Southern Hemisphere.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | Antarctica, carbon deposition, ice core record |
| Research Division: | Earth Sciences |
| Research Group: | Physical geography and environmental geoscience |
| Research Field: | Glaciology |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding knowledge |
| Objective Field: | Expanding knowledge in the earth sciences |
| UTAS Author: | Curran, MAJ (Dr Mark Curran) |
| UTAS Author: | van Ommen, TD (Dr Tas van Ommen) |
| ID Code: | 76842 |
| Year Published: | 2011 |
| Deposited By: | CRC-Antarctic Climate & Ecosystems |
| Deposited On: | 2012-03-14 |
| Last Modified: | 2022-08-25 |
| Downloads: | 550 View Download Statistics |
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