Paleoclimatic Assessment Based on Palynological and Organic Geochemical Proxies in Lake Sediments in Thailand

Authors

  • Akkaneewut Chabangborn Department of Geology, Faculty of Science, Chulalongkorn University

Abstract

Proxies in lake sediment study in Thailand have been here summarized and discussed. Palynology and organic geochemistry are commonly used to reconstruct the past climate. The pollen and spore records provide the information of plant diversity and also vegetation dynamics in regarding to the climate change. However, this approach has several limitations mainly caused by the differences in pollen production, dispersion, preservation and identification. Total organic carbon, carbon and nitrogen ratio, carbon and nitrogen isotope ratios are                           the indicator of abundance and origin of organic matters reflected lake level and runoff fluctuation. Since the organic matters have been altered and decomposed by microbial activities through time, environmental assessment based of organic geochemical proxies are complicate. Therefore to compare with the other proxies and to understand              the present conditions of the lake are necessitated in order to reduce uncertainty in the past climate reconstruction. Keywords :  lake sediment, proxy, palynology, geochemistry, organic matter

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Published

2017-01-27