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On climate reconstruction using bivalves: three methods to interpret the chemical signature of a shell
Bauwens, M.; Ohlsson, H.; Barbé, K.; Beelaerts, V.; Dehairs, F.; Schoukens, J. (2011). On climate reconstruction using bivalves: three methods to interpret the chemical signature of a shell. Comput. Methods Programs Biomed. 104(2): 104-111. http://dx.doi.org/10.1016/j.cmpb.2010.08.020
In: Computer Methods and Programs in Biomedicine. Elsevier: Amsterdam; London; New York, NY; Tokyo. ISSN 0169-2607; e-ISSN 1872-7565
Peer reviewed article  
Available in  Authors 
    Vlaams Instituut voor de Zee: Open Marine Archive 279671 [ download pdf ]
Keywords
    Bivalvia [WoRMS]
    Marine/Coastal
Author keywords
    Climate reconstruction; Nonlinear multi-proxy models; Manifold learning; Support Vector Regression; Bivalve; Sclerochronology
Authors  Top 
  • Bauwens, M.
  • Ohlsson, H.
  • Barbé, K.
  • Beelaerts, V.
  • Dehairs, F.
  • Schoukens, J.
Abstract
    To improve our understanding of the climate process and to assess the human impact on current global warming, past climate reconstruction is essential. The chemical composition of a bivalve shell is strongly coupled to environmental variations and therefore ancient shells are potential climate archives. The nonlinear nature of the relation between environmental condition (e.g. the seawater temperature) and proxy composition makes it hard to predict the former from the latter, however. In this paper we compare the ability of three nonlinear system identification methods to reconstruct the ambient temperature from the chemical composition of a shell. The comparison shows that nonlinear multi-proxy approaches are potentially useful tools for climate reconstructions and that manifold based methods result in smoother and more precise temperature reconstruction.
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