Correspondence between Sedimentary Uk37 index and  seasonal Coccolith production

doi:10.3969/j.issn.1001-909X.2015.01.004

Abstract

Abstract: In this study, the U^k₃₇indices for surface sediment samples derived from the South China Sea (SCS), Pacific Ocean, East China Sea (ECS) and Arctic Ocean are analysed, as well as the overlying averaged sea surface temperature (SST) at 0~30 m depth. The alkenone-derived U^k₃₇index is justified as a useful palaeoenvironment proxy at extreme cold and warm end (-0.6 ℃~28 ℃) because the resulting U^k₃₇indices show a significant correlated linear relationship with annual averaged SST. Simultaneously, U^k₃₇indices have been correlated with averaged SST of four seasons in the SCS as well. However, the seasonal pattern of Coccolith (E. huxleyi and G. oceanic), being source of alkenone, is showed prosperous in winter time. As a result, the sedimentary U^k₃₇index may only reflect the winter SST of the overlying waters.

Key words: palaeoenvironment proxy, U^k₃₇index, surface sediment, South China Sea

CLC Number:

P734.5

ZHANG Jing-jing, CHEN Jian-fang, LI Hong-liang, JIN Hai-yan, WANG Bin , LIU Fei. Correspondence between Sedimentary U^k₃₇index and seasonal Coccolith production[J]. Journal of Marine Sciences, 2015, 33(1): 25-32.

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Correspondence between Sedimentary U^k₃₇index and seasonal Coccolith production

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