Arctic ice core records of vanillic acid from Siberia, Greenland, and Svalbard

Diedrich.Fritzsche [ at ]


Biomass burning is a major source atmospheric gases and aerosols, and an important part of the global carbon cycle and radiation budget. The factors controlling centennial and millennial variability in region/global biomass burning are not well understood because there are few well-dated proxy records. We are exploring ice core records of organic compounds resulting from incomplete combustion of lignin as tracers for biomass burning. In this study we investigate the distribution of vanillic acid (VA) in Arctic ice cores. VA is a major product of conifer combustion, but may also be produced from angiosperms. VA was measured in ice core samples using ion chromatography with electrospray MS/MS detection. Here we present measurements of vanillic acid in three Arctic ice cores from Siberia (Akademii Nauk; 0-3 kyr bp), northern Greenland (Tunu; 0-1.75 kyr bp), and Svalbard (Lomonosovfonna; 0-0.75 kyr bp). The Siberian record exhibits 3 strong centennial scale maxima (1200-600 BC, AD 300-800, and AD 1450-1700). All three cores exhibit a smaller feature around 1250, with a subsequent decline in Greenland and Svalbard. VA levels in Greenland and Svalbard are generally smaller than those in Siberia. These results suggest strong input from Asian sources to the Siberian core, and lower Arctic-wide “background” levels at the other sites.

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Conference (Poster)
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AGU Fall meeting, 14 Dec 2015 - 18 Dec 2015, San Francisco, USA.
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Grieman, M. M. , Saltzman, E. , McConnell, J. R. , Fritzsche, D. , Opel, T. , Isaksson, E. and Schwikowski, M. (2015): Arctic ice core records of vanillic acid from Siberia, Greenland, and Svalbard , AGU Fall meeting, San Francisco, USA, 14 December 2015 - 18 December 2015 .

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