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

Oceanographic Implications

Bibliographic Data

ID9245294
AuthorsEdouard Bard (0000-0002-7237-8622), Maurice Arnold, J R Toggweiler (0000-0001-6345-5756), Pierre Maurice (0000-0001-5489-3121), Jean-Claude Duplessy
Year1989
Volume31
Issue03
Pages510-522
Publication date1989-01-01
Open AccessNo
TypeARTICLE
VenueRadiocarbon (JOURNAL)
Journal identifiersISSN: 0033-8222 • E-ISSN: 1945-5755
PublisherCambridge University Press (CUP) (PUBLISHER)
DOI10.1017/s0033822200012108
OpenAlexW2481921172
LanguageEN
Citations received7

AMS 14 C measurements on samples collected in the tropical-equatorial Indian Ocean during the INDIGO program (leg II, 1986) are presented and compared with β-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- 14 C 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- 14 C budget is dominated by Mode Water advection

Accelerator mass spectrometry · Advection · Archipelago · Climatology · Indian ocean · Latitude · Ocean current · Ocean gyre · Pacific ocean · Radiocarbon dating · Subtropics · Thermohaline circulation · Water mass · Environmental Science · Geology and Paleoclimatology Research · Groundwater and Isotope Geochemistry · Oceanographic and Atmospheric Processes · Geology · Oceanography

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