孟加拉湾深海记录中的等深流活动特征及其环境意义初探

方念乔; 陈萍; 吴琳; 石峰

Volume 27 Issue 5

Sep. 2002

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FANG Nian-qiao, CHEN Ping, WU Lin, SHI Feng, 2002. Contour Currents in Deep-Water Records from Bay of Bengal and Its Environmental Implication. Earth Science, 27(5): 570-575.

Citation:

FANG Nian-qiao, CHEN Ping, WU Lin, SHI Feng, 2002. Contour Currents in Deep-Water Records from Bay of Bengal and Its Environmental Implication. Earth Science, 27(5): 570-575.

FANG Nian-qiao, CHEN Ping, WU Lin, SHI Feng, 2002. Contour Currents in Deep-Water Records from Bay of Bengal and Its Environmental Implication. Earth Science, 27(5): 570-575.

Citation:

FANG Nian-qiao, CHEN Ping, WU Lin, SHI Feng, 2002. Contour Currents in Deep-Water Records from Bay of Bengal and Its Environmental Implication. Earth Science, 27(5): 570-575.

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Contour Currents in Deep-Water Records from Bay of Bengal and Its Environmental Implication

Institute of Marine Geology and Geophysics, China University of Geosciences, Beijing 100083, China

Received Date: 2002-07-30
Publish Date: 2002-09-25

Abstract

Abstract

The analysis of measured data and sedimentary records shows that strong contour currents-occur in the Bay of Bengal. The sedimentary research into 3 piston cores from the middle and eastern Bengal deep-water fan indicates those thin-bedded muddy silts, with heavy oxidation colors and a few calcareous gravely-corroded shells but free of any graded bedding, are products of deposition of reworked materials by geostrophic bottom currents. The contour currents derived from the Arctic and Antarctic, essential constituents of the global thermohaline circulation, were repeatedly enhanced in the past 150 ka. This intensification of the currents, presenting a great impact on the environment changes in the province under study, may serve as a link to make a climatic enhancement of the tele-connection between the low-latitude and the pole regions. It is very unlikely that there is a close relation between the intensifications of the contour currents and the glacial cycles. The records of intensified contour currents can be observed in oxygen isotope stages 3, 4 and 5. The enhanced controlling mechanism remains to be further investigated.
- contour currents,
- the Bay of Bengal,
- indicator,
- thermohaline circulation,
- paleo-environmental change.

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References(19)

References

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