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dc.contributor.authorLaluraj, C.M.
dc.contributor.authorThamban, M.
dc.contributor.authorNaik, S.S.
dc.contributor.authorRedkar, B.L.
dc.contributor.authorChaturvedi, A.
dc.contributor.authorRavindra, R.
dc.date.accessioned2011-03-09T10:55:24Z
dc.date.available2011-03-09T10:55:24Z
dc.date.issued2011
dc.identifier.citationHolocene, vol.21(2); 2011; 351-356
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/3806
dc.description.abstractHigh-resolution records of nitrate (NO sub(3) sup(-)), oxygen isotope (delta sup(18) O) and non-sea salt sulphate (nssSO sub(4) sup(2-)) were studied using an ice core collected from central Dronning Maud Land in East Antarctica to identify the influence of environmental variability on accumulation of NO sub(3) sup(-) over the past 450 years. The results confirmed that multiple processes were responsible for the production and preservation of NO sub(3) sup(-) in Antarctic ice. Correlation between NO sub(3) sup(-) and nssSO sub(4) sup(2-) peaks revealed that sulphate aerosols released during major volcanic eruptions might have activated the production of nitric acid, which was scavenged by ion-induced nucleation in polar ice sheets. The correlation between the nitrate and delta sup(18) O records further suggest that enhanced NO sub(3) sup(-) preservation in the ice occurred during periods of lower atmospheric temperature. Major shifts in the NO sub(3) sup(-) record of the ice core presently studied and its comparison with 10Be record from a core collected from South Pole suggest that a reduction in solar activity influenced the NO sub(3) sup(-) accumulation in Antarctica through enhanced production of odd nitrogen species
dc.language.isoen
dc.publisherSAGE Publications
dc.rights© The Author(s) 2010. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository
dc.subjectnitrate records
dc.subjectoxygen isotope
dc.subjectAntarctica
dc.subjectnitrogen species
dc.titleNitrate records of a shallow ice core from East Antarctica: Atmospheric processes, preservation and climatic implications
dc.typeJournal Article


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