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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
Author:Curran, MAJ (Dr Mark Curran)
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:2014-08-26
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