Multidecadal variations in the Early Holocene outflow of Red Sea water into the Arabian Sea

American Geophysical Union (AGU) - Tập 16 Số 6 - Trang 658-668 - 2001
Simon Jung, G.M. Ganssen1, G.R. Davies
1Earth and Climate

Tóm tắt

We present Holocene stable oxygen isotope data from the deep Arabian Sea off Somalia at a decadal time resolution as a proxy for the history of intermediate/upper deep water. These data show an overall δ18O reduction by 0.5‰ between 10 and ∼6.5 kyr B.P. superimposed upon short‐term δ18O variations at a decadal‐centennial timescale. The amplitude of the decadal variations is 0.3‰ prior, and up to 0.6‰ subsequent, to ∼8.1 kyr B.P. We conclude from modeling experiments that the short‐term δ18O variations between 10 and ∼6.5 kyr B.P. most likely document changes in the evaporation‐precipitation balance in the central Red Sea. Changes in water temperature and salinity cause the outflowing Red Sea Water to settle roughly 800 m deeper than today.

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American Geophysical Union (AGU)

Tập 16 Số 6

658-668

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