Records in palaeo-notch sediment: changes in palaeo-productivity and their link to climate change from Svalbard

Zhongkang, Yang and Yuhong, Wang and Liguang, Sun (2018) Records in palaeo-notch sediment: changes in palaeo-productivity and their link to climate change from Svalbard. Advances in Polar Science, 29 (4). pp. 243-253.

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Abstract

Palaeo-notch sediment, accumulated in lacustrine environment, is a reliable proxy material for palaeoclimatic and palaeoenvironmental research. In this study, we collected a palaeo-notch sediment profile from the Blomstrandhalvøya, used multiple geochemical proxies to reconstruct palaleoproductivity variations, and investigated their link to climatic records from surrounding regions. C/N atomic ratios and carbon isotope indicate that organic matter in the sediment is mainly derived from lacustrine algae. Toward the surface sediment, the TOC, TN, P contents and the reconstructed palaeoproductivity show remarkable fluctuations with several peaks and troughs, opposite to the variation trend of the CaCO3 contents. Changes in the reconstructed palaeoproductivity are in good agreement with palaeoclimatic records from the surrounding regions, and three interruptions are likely linked to the well-known cooling periods around 1900 BP, 2800 BP and 4200 BP. Thus palaeoproductivity variations on the Blomstrandhalvøya are mainly driven by climate changes; palaeoproductivity increase during warmer periods, and vice versa. This study will help the research of Arctic lake ecosystem and its response to climate change.

Item Type:	Article
Related URLs:
Keywords:	palaeo-notch sediment, geochemical analysis, palaleoproductivity, climate change, Svalbard
Subjects:	Natural Environment > Atmosphere Natural Environment > Terrestrial
Organizations:	Unspecified
Date Deposited:	08 Nov 2023 13:53
URI:	http://library.arcticportal.org/id/eprint/2671

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