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Title: Fluvial organic carbon losses from a Bornean blackwater river
Authors: Moore, S.
Gauci, V.
Evans, C.D.
Page, S.E.
First Published: 2011
Publisher: Copernicus GmbH (Copernicus Publications) on behalf of the European Geosciences Union (EGU)
Citation: Biogeosciences, 2011, 8 (4), pp. 901-909
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[superscript −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[superscript −2] yr[superscript −1]. When extrapolating the River Sebangau DOC loss flux (83 g C m[superscript −2] yr[superscript −1]) to the peat covered area of Indonesia (206 950 km[superscript 2]), we estimate a DOC loss of 17.2 Tg C yr[superscript −1] or ~10% of current estimates of the global annual riverine DOC discharge into the ocean.
DOI Link: 10.5194/bg-8-901-2011
ISSN: 1726-4170
eISSN: 1726-4189
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: © Author(s) 2011. This is an open-access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Appears in Collections:Published Articles, Dept. of Geography

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