High-resolution records of thermocline in the Okinawa trough since about 10000 aBP

被引：4

作者：

Wang J. ^{[1
]}

Saito Y. ^{[2
]}

Oba T. ^{[3
]}

Jian Z. ^{[1
]}

Wang P. ^{[1
]}

机构：

[1] Laboratory of Marine Geology, MOE, Tongji University

[2] Geological Survey of Japan

[3] Department of Geoscience, Graduate School of Environmental Earth Science, Hokkaido University

来源：

Science in China Series D: Earth Sciences | 2001年 / 44卷 / 3期

基金：

中国国家自然科学基金;

关键词：

Depth of thermocline (DOT); Kuroshio Current; Okinawa Trough; Planktonic foraminifera; Sea surface temperature (SST); Stable isotopes;

D O I：

10.1007/BF02882253

中图分类号：

学科分类号：

摘要：

The present paper uses planktonic foraminifera and their stable isotopes to study the changes in the depth of thermocline (DOT) in the Okinawa Trough since the last 10000 a based on the analysis of Core B-3GC in the northern Okinawa Trough, together with that of the core in the southern Okinawa Trough. As results show, the thermocline was shallow before 6400 aBP, and deepened afterward, then became shallow again from 4000 to 2000 aBP. The DOT fluctuations display a positive correlation with those of sea surface temperature (SST). In addition, the changes in the northern Okinawa Trough are similar to those in the southern trough, implying a possible connection with the variation of the Kuroshio Current. The changes of SST and DOT suggest that the Kuroshio Current changed its intensity or main axis from 4000 to 2000 aBP and around about 6400 aBP respectively. Moreover, the changes of DOT from 8200 to 6400 aBP may indicate a gradual intensification of the Kuroshio Current.

引用

页码：193 / 200

页数：7

共 22 条

[1]

Ye D.Z., Zeng Q.C., Guo Y.F., Modern Climate, (1991)

[2]

Chen M.T., Prell W.L., Faunal distribution patterns of planktonic foraminifera in surface sediments of the low-latitude Pacific, Paleo., Paleo., Paleo, 137, (1995)

[3]

Ravelo A.C., Fairbanks R.G., Philander G., Reconstructing tropical Atlantic hydrography using planktonic foraminifera and ocean model, Paleoceanography, 5, 3, (1990)

[4]

Ravelo A.C., Fairbanks R.G., Oxygen isotopic composition of multiple species of planktonic foraminifera: Recorders of the modern photic zone temperature gradient, Paleoceanography, 7, 6, (1992)

[5]

Andreason D.J., Ravelo A.C., Tropical Pacific Ocean thermocline depth reconstructions for the last glacial maximum, Paleoceanography, 12, 3, (1997)

[6]

Schmit H., Berger W.H., Bickert H., Et al., Quaternary carbon isotope records of pelagic foraminifers: Site 806, Ontong Java Plateau, Proc. ODP, Sci. Result, 130, (1993)

[7]

Chen X.R., Wang P.X., Approach to vertical structure variation of upper layer in the Okinawa Trough using nannofossils, Science in China, 41, 3, (1998)

[8]

Li B., Zhao Q., Wang Y., Et al., Paleoceanographic events of the southern Okinawa Trough during last 20000 years, Acta Oceanologica Sinica, 17, 4, (1998)

[9]

Wang J.L., The changes of thermocline depth in the northern Okinawa Trough during the Holocene, Quaternary Sciences, 3, (1999)

[10]

Jin X.L., Geology of the East China Sea, (1992)

← 1 2 3 →