A multiproxy approach to understanding the "enhanced" flux of organic matter  through the oxygen-deficient waters of the Arabian Sea

Keil, Richard G.; Neibauer, Jacquelyn A.; Biladeau, Christina; van der Elst, Kelsey; Devol, Allan H.

doi:10.5194/bg-13-2077-2016

Articles | Volume 13, issue 7

https://doi.org/10.5194/bg-13-2077-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

Low oxygen environments in marine, fresh and estuarine...

https://doi.org/10.5194/bg-13-2077-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 13, issue 7

Research article

| Highlight paper

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08 Apr 2016

Research article | Highlight paper |

| 08 Apr 2016

A multiproxy approach to understanding the "enhanced" flux of organic matter through the oxygen-deficient waters of the Arabian Sea

Richard G. Keil, Jacquelyn A. Neibauer, Christina Biladeau, Kelsey van der Elst, and Allan H. Devol

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Nov 2015	22	31	1	54
Dec 2015	9	12	1	22
Jan 2016	24	7	1	32
Feb 2016	14	5	1	20
Mar 2016	13	3	0	16
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Jun 2016	78	20	13	111
Jul 2016	64	12	5	81
Aug 2016	68	19	3	90
Sep 2016	65	12	2	79
Oct 2016	62	14	2	78
Nov 2016	24	7	1	32
Dec 2016	16	4	3	23
Jan 2017	33	10	2	45
Feb 2017	38	4	7	49
Mar 2017	58	15	9	82
Apr 2017	83	16	12	111
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Jul 2017	34	13	4	51
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Nov 2025	28	40	4	72
Dec 2025	1	0	1

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Short summary

Drifting sediment traps were deployed in the oxygen-deficient waters of the Arabian Sea, where the sinking flux is less attenuated than in more oxic waters. Six mechanisms that might explain this "enhanced flux" were evaluated using literature and data. In the upper 500 m, evidence was found supporting an oxygen effect and/or changes in the efficiency of the microbial loop, including the addition of chemoautotrophic carbon to the sinking flux.