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Fluvial organic carbon losses from a Bornean blackwater river

Moore, S.; Gauci, V.; Page, S.; Evans, C. and Limin, S. (2010). Fluvial organic carbon losses from a Bornean blackwater river. In: 2010 AGU (American Geophysical Union) Fall Meeting , 13-17 December 2010, San Francisco, CA, USA.

URL: http://www.agu.org/meetings/fm10/
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Abstract

The transport of carbon from terrestrial ecosystems such as peatlands into rivers and out to the oceans plays an important role in the carbon cycle because it provides a link between the terrestrial and marine carbon cycles. 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 88g C m-2 yr-1. When extrapolating the Sebangau catchment TOC loss flux (88g C m-2 yr-1) to the peat covered area of Indonesia (206,950 km2), we calculate a TOC loss of 18.2 Tg C yr-1 or ~10% of current estimates of the global annual riverine DOC discharge into the ocean.

Item Type: Conference Item
Copyright Holders: 2010 The Authors
Academic Unit/Department: ?? scie-easc ??
Science > Environment, Earth and Ecosystems
Interdisciplinary Research Centre: OpenSpace Research Centre (OSRC)
Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
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Item ID: 32778
Depositing User: Vincent Gauci
Date Deposited: 29 Feb 2012 17:06
Last Modified: 16 Nov 2012 16:35
URI: http://oro.open.ac.uk/id/eprint/32778
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