WINTER SURFACE SEAWATER TEMPERATURE IN THE NORTHERN SOUTH CHINA SEA INDUCED FROM TEMPERATURE INDEX OF SHELL OXYGEN ISOTOPE OF GLOBIGERINOIDES RUBER

XU Shendong; CHEN Wenhuang; DENG Wenfeng; JIA Guodong

doi:10.16562/j.cnki.0256-1492.2016.02.012

2016 Vol. 36, No. 2

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XU Shendong, CHEN Wenhuang, DENG Wenfeng, JIA Guodong. WINTER SURFACE SEAWATER TEMPERATURE IN THE NORTHERN SOUTH CHINA SEA INDUCED FROM TEMPERATURE INDEX OF SHELL OXYGEN ISOTOPE OF GLOBIGERINOIDES RUBER[J]. Marine Geology & Quaternary Geology, 2016, 36(2): 101-107. doi: 10.16562/j.cnki.0256-1492.2016.02.012

Citation:

XU Shendong, CHEN Wenhuang, DENG Wenfeng, JIA Guodong. WINTER SURFACE SEAWATER TEMPERATURE IN THE NORTHERN SOUTH CHINA SEA INDUCED FROM TEMPERATURE INDEX OF SHELL OXYGEN ISOTOPE OF GLOBIGERINOIDES RUBER[J]. Marine Geology & Quaternary Geology, 2016, 36(2): 101-107. doi: 10.16562/j.cnki.0256-1492.2016.02.012

WINTER SURFACE SEAWATER TEMPERATURE IN THE NORTHERN SOUTH CHINA SEA INDUCED FROM TEMPERATURE INDEX OF SHELL OXYGEN ISOTOPE OF GLOBIGERINOIDES RUBER

1. Guangzhou Institute of Geochemistry, Guangzhou 510640;
2. School of Marine Sciences, Guangxi University, Nanning 530004;
3. Coral Reef Research Center of China, Guangxi University, Nanning 530004;
4. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092

Received Date: 03 January 2015

Revised Date: 11 April 2015

Abstract

Abstract

The oxygen isotope value (δ18O) of foraminiferal shell depends upon the δ18O and temperature of sea water. The seawater temperature, therefore, can be extracted from foraminiferal δ18O if the δ18O composition of sea water is known. In this paper, the planktonic foraminifera Globigerinoides ruber picked out from the nine sediment cores in the northern South China Sea were analyzed for δ18O. Using the published summer and winter sea water δ18O values at each site, we calculated the sea water temperature (Truber), and then comparison was made for Truber and the 0~30m water temperature download from the World Ocean Atlas (WOA) database. Our data shows that there is a large difference between TWOA and Truber when summer water δ18O was used in calculation, however, the difference was in a reasonable range when winter water δ18O was used. It suggests that δ18Oruber reflects better the temperature and δ18O composition of winter seawater, and further implies that the productivity and deposition flux of G.ruber may reach the maximum when the East Asian Winter Monsoon prevails.
- planktonic foraminifera /
- oxygen isotope /
- sea surface temperature /
- northern South China Sea

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References

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