Bomb C-14 in the Indian-Ocean Measured by Accelerator Mass-Spectrometry - Oceanographic Implications

Publication Status is "Submitted" Or "In Press: 
LDEO Publication: 
Publication Type: 
Year of Publication: 
1989
Editor: 
Journal Title: 
Radiocarbon
Journal Date: 
Place Published: 
Tertiary Title: 
Volume: 
31
Issue: 
3
Pages: 
510-522
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Publisher: 
ISBN Number: 
0033-8222
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Edition: 
Short Title: 
Accession Number: 
ISI:A1989EW80500039
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Abstract: 

AMS C-14 measurements on samples collected in the tropical-equatorial Indian Ocean during the INDIGO program (leg II, 1986) are presented and compared with beta-counting results obtained under both INDIGO program and GEOSECS expedition in the Indian Ocean (1978). The most significant observation is a doubling of the bomb-C-14 inventory and mean penetration depth in the equatorial zone. Based on hydrologic considerations, two hypotheses can be proposed: 1) direct influx of Pacific mid-latitude waters through the Indonesian archipelago and 2) advection and/or mixing with Mode Water from the southern gyre of the Indian Ocean. Results obtained with a general circulation model of the ocean suggest that the influx from the Pacific is important in the upper 300m and that below 500m the bomb-C-14 budget is dominated by Mode Water advection.

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Ew805Times Cited:6Cited References Count:16

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