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Fluvial organic carbon losses from a Bornean blackwater river

Moore, S.; Gauci, V.; Evans, C. D. and Page, S. E. (2011). Fluvial organic carbon losses from a Bornean blackwater river. Biogeosciences, 8(4) pp. 901–909.

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DOI (Digital Object Identifier) Link: http://doi.org/10.5194/bg-8-901-2011
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Abstract

Concentrations of dissolved organic carbon (DOC) and particulate organic carbon (POC) were analysed from the source to the mouth of the River Sebangau in Central Kalimantan, Indonesia during the dry and wet seasons in 2008/2009 and an annual total organic carbon (TOC) flux estimated. DOC concentrations were higher and POC concentrations lower in the wet season compared to the dry season. As seen in other tropical blackwater rivers, DOC concentration is consistently around 10 times greater than POC concentration. We estimate the annual TOC flux discharged to the Java Sea to be 0.46 Tg year−1 comprising of 93% (0.43 Tg) DOC and 7% (0.03 Tg) POC. This equates to a fluvial TOC loss flux per unit area over the entire Sebangau catchment of 88 g C m−2 yr−1. When extrapolating the River Sebangau DOC loss flux (83 g C m−2 yr−1) to the peat covered area of Indonesia (206 950 km2), we estimate a DOC loss of 17.2 Tg C yr−1 or ~10% of current estimates of the global annual riverine DOC discharge into the ocean.

Item Type: Journal Article
Copyright Holders: 2011 The Author(s)
ISSN: 1726-4189
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNE/F008813/1NERC (Natural Environment Research Council)
Academic Unit/Department: Science > Environment, Earth and Ecosystems
Science
Interdisciplinary Research Centre: OpenSpace Research Centre (OSRC)
Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 28503
Depositing User: Vincent Gauci
Date Deposited: 13 Apr 2011 15:40
Last Modified: 24 Feb 2016 07:01
URI: http://oro.open.ac.uk/id/eprint/28503
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