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Home > Books > Other > IMPROVING TECHNIQUES AND INTERPRETATIONS FOR RECONSTRUCTING HIGH-RESOLUTION PALEOCLIMATE IN DEEP TIME FROM BIVALVE SHELLS AND TOOTH ENAMEL (pdf)
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Publication date:08/03/2019

IMPROVING TECHNIQUES AND INTERPRETATIONS FOR RECONSTRUCTING HIGH-RESOLUTION PALEOCLIMATE IN DEEP TIME FROM BIVALVE SHELLS AND TOOTH ENAMEL (pdf)

by: Niels de Winter

Studies of past climate teach us about the variability of climate on Earth and how climate responds on different timescales. These observations are vital for improving our knowledge of Earth’s climate system and allow us to better predict climate in the future. However, due to the difficulty in finding archives that record climate at a high temporal resolution (days to decades), much of climate reconstructions has remained limited to long-term (thousands to millions of years) climate trends. In this thesis, I investigate two types of archives that have the potential to record information about climate in deep time (millions of years in the past) at high resolution. The first, the shells of marine bivalve mollusks, are known to reflect changes in their living environment in their shell chemistry (stable isotope and trace element composition). Secondly, tooth enamel forms a comparable alternative archive for sub-annual climate in the terrestrial realm. I demonstrate that both these archives have the potential to preserve their original chemical composition over long timescales (tens to hundreds of millions of years) and develop new methods to assess whether their preservation is good enough to allow reliable paleoclimate reconstructions. Within the scope of this thesis, several new methods for high-resolution trace element analysis, such as non-destructive X-Ray Fluorescence analysis and daily-resolved LA-ICP-MS measurements, were developed that enhance the possibilities to study this material. I apply these techniques on a combination of multiple co-existing species of bivalve as well as assemblages of different individuals of the same species to verify whether reconstructions from these shells can be reproduced and whether extinct species of bivalves, such as rudists, can be used to reconstruct climate. Finally, I developed modelling approaches which improve the interpretations of variations in trace element concentrations in multiple dimensions through shells and teeth, enhancing interpretations of their significance for climate reconstructions. 

 

De pdf van dit doctoraat kun je gratis downloaden via deze link.
(You can download the pdf of this doctoral thesis free of charge from this link.)

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IMPROVING TECHNIQUES AND INTERPRETATIONS FOR RECONSTRUCTING HIGH-RESOLUTION PALEOCLIMATE IN DEEP TIME FROM BIVALVE SHELLS AND TOOTH ENAMEL (pdf)
Author(s): Niels de Winter
ISBN: 9789057188756
Format: 17 x 24
Number of pages 434

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