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Late Quaternary climate history of coastal Antarctic environments: a multi-proxy approach

Research project EV/01 (Research action EV)

Persons :

Description :

This proposal is to maintain and develop Belgium’s role as an integral part of two international research programmes, "Palaeolimnological investigations of coastal continental lakes in the Larsemann Hills" and "Millennial-scale History of the George VI Sound Ice Shelf and palaeoenvironmental history of Alexander Island, Antarctic Peninsula". Both are core projects in the British Antarctic Survey (U.K.) 2000-2006 5 year science programme "Signals in Antarctica of Past Global Changes (SAGES)* which combines lake, ice and marine sediment cores in an integrated study of past environments. SAGES is designed to contribute to work tasks set by the past global changes (PAGES) component of the International Geosphere Biosphere Program (IGBP) and the Scientific Committee for Antarctic Research (SCAR) Global Change and Antarctica Program (GLOCHANT).

The continued collaboration of the Belgian scientific teams headed by Dr. Wim Vyverman and Dr. Annick Wilmotte has been requested by the coordinators of this programme, Dr. Dominic Hodgson and Dr. Eric Wolff, following a successful partnership developed within the framework of the EU-project MICROMAT. During MICROMAT the Belgian teams have developed novel expertise in the study of microbial communities in lake sediments, which constitutes a unique potential to develop molecular tools for palaeoenvironmental reconstructions. The current proposal seeks to obtain from the Belgian government the financial means to support the Belgian personnel, their laboratories and the working costs necessary to contribute to maintain this international scientific cooperation.

The general objective of the current proposal is to contribute to the understanding of the millennial- and centennial-scale Late Quaternary climate history of contrasting Antarctic environments, based on a multi-proxy, multi-site approach of coastal lakes sediments.

The specific objectives of the current proposal are:

1) The further development and testing of molecular tools (based on rDNA) for palaeoenvironmental reconstruction.
2) The development of calibration datasets of fossilizable protists and biomolecules representing current environmental variability in contrasting maritime and continental Antarctic coastal regions.
3) The construction and validation of inference models and indices to infer environmental conditions based on fossil assemblages of a range of micro-organisms and biomolecules
4) The application of these multiple proxies in the analysis of sediment cores from coastal lakes in continental and maritime Antarctica
The participation in the integrated analysis of multiple biological, physical and chemical proxies and in the formulation of regional reconstructions of climate change in Antarctica during the past 30.000 years.

Documentation :

Late Quaternary climate history of coastal Antarctic environments: a multi-proxy approach (LAQUAN) : final report  Vyverman, Wim - Wilmotte, Annick - Verleyen, Elie ... et al  Brussels : Belgian Science Policy, 2007 (SP1690)
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Late Quaternary climate history of coastal Antarctic environments: a multi-proxy approach (LAQUAN) : abstract - samenvatting - résumé    Brussels : Belgian Science Policy, 2007 (SP1716)
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Bibliografic references :

A generalised structure-activity relationship for the decomposition of (substituted) alkoxy radicals  J. Peeters, G. Fantechi, L. Vereecken  Journal of Atmospheric Chemistry, 48, 2004 

A highly sensitive method for time-resolved detection of O(1D) applied to precise determination of absolute O(1D) reaction rate constants and O(3P) yields
  S.A. Carl  Physical Chemistry - Chemical Physics, 7 , 2005 

A selected ion flow tube study of the reactions of H3O+, NO+ and O2+ with a series of monoterpenes  N. Schoon, C. Amelynck, L. Vereecken, E. Arijs  International Journal of Mass Spectrometry, 229, 2003 

A selected ion flow tube study of the reactions of H3O+, NO+ and O2+ with some monoterpene oxidation products  N. Schoon, C. Amelynck, L. Vereecken, H. Coeckelberghs, E. Arijs  International Journal of Mass Spectrometry, 239, 2004 

Alpha-pinene oxidation by OH: simulations of laboratory experiments  M. Capouet, J. Peeters, B. Nozière, J.-F. Müller  Atmospheric Chemistry and Physics, 4, 2005 

Computational study of the stability of á-hydroperoxyl- or á-alkylperoxyl substituted alkyl radicals  L. Vereecken, T.L. Nguyen, I. Hermans, J. Peeters  Chemical Physics Letters, 393 , 2004 

Kinetics of alfa-hydroxy-alkylperoxyl radicals in oxidation processes. HO2-initiated oxidation of ketones/aldehydes near the tropopause
  I. Hermans, J.F. Müller, T.L. Nguyen, P.A. Jacobs, J. Peeters  The Journal of Physical Chemistry, A, 109, 2005 

Non-traditional (per)oxy ring-closure paths in the atmospheric oxidation of isoprene and monoterpenes  L. Vereecken, J. Peeters  The Journal . Phys. Chem. A., 108, 2004 

The 1,5-H-shift in 1-butoxy: a case study in the rigorous implementation of Transition State Theory for multi-rotamer systems
  L. Vereecken, J. Peeters Journal of Chemical Physics, 119, 2003 

The reaction of acetaldehyde and propionaldehyde with hydroxyl radicals: experimental determination of the primary H2O yield at room temperature  S. Vandenberk, J. Peeters Journal of Photochemistry and Photobiology, 157, 2003 

Theoretical and experimental study of the product branching in the reaction of acetic acid with OH radicals.  F. De Smedt, X. V. Bui, T. L. Nguyen, J. Peeters, L. Vereecken  The Journal of Physical Chemistry A, 109, 2005 

Tropopause chemistry revisited: HO2-initiated oxidation as an efficient acetone sink  I. Hermans, T.L. Nguyen, P.J. Jacobs, J. Peeters  Journal of the American Chemical Society, 126, 2004 

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