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https://doi.org/10.5194/bgd-6-797-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bgd-6-797-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
13 Jan 2009
Status: this discussion paper is a preprint. It has been under review for the journal Biogeosciences (BG). The manuscript was not accepted for further review after discussion.
Soil carbon stocks in ecoregions of Africa
Abstract. The African continent plays a growing role in the carbon (C) cycle. However, Africa is one of the weakest links in our understanding of the global carbon cycle particularly when considering the soil compartment. Most of the soil organic carbon (SOC) estimates concern the global size of the soil C reservoir without indication on its distribution, or if given, limited to the contribution of a large ecosystems or region.
The aim of the study is i) to assess the original soil C stocks (SOC) of Africa for the different countries and Ecoregions, and ii) to compare SOC estimates from different soil properties databases and digital maps. Four recent global digital soil maps and five soil properties databases were used to estimate the SOC for different soil layers in Africa. Those databases hold between 1799 and 4043 soil profiles which are considered to represent the soil units showed on a 0.5 by 0.5 degree soil maps of Africa.
SOC of Africa ranged 133 420–184 116 Tg for 0–100 cm soil layer. The most recent databases estimated 166 397 Tg C which corresponded to 9% of the global SOC stock and 68% of the terrestrial C pool of Africa. Average SOC ranges 0.4–8.2 kg m−2 at national scale and 1.53–6.61 kg m−2 for ecoregions. Using different soil database or spatial data leads to up to 30% of difference. These quantities indicate a great potential to develop sink activities through soil C sequestration activities.
How to cite. Henry, M., Valentini, R., and Bernoux, M.: Soil carbon stocks in ecoregions of Africa, Biogeosciences Discuss., 6, 797–823, https://doi.org/10.5194/bgd-6-797-2009, 2009.
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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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RC S181: 'General review', Anonymous Referee #1, 25 Feb 2009
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RC S191: 'Comments', Anonymous Referee #2, 25 Feb 2009
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AC S913: 'Answer to the comments of the referee#1', Matieu Henry, 29 Apr 2009
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AC S922: 'Answer to the comments of the referee#2', Matieu Henry, 29 Apr 2009
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
- Printer-friendly version
- Supplement
-
RC S181: 'General review', Anonymous Referee #1, 25 Feb 2009
-
RC S191: 'Comments', Anonymous Referee #2, 25 Feb 2009
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AC S913: 'Answer to the comments of the referee#1', Matieu Henry, 29 Apr 2009
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AC S922: 'Answer to the comments of the referee#2', Matieu Henry, 29 Apr 2009
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Latest update: 18 Apr 2024
M. Henry
Institut de Recherche pour le Développement, IRD, UR SeqBio, SupAgro, Bat 12, 2 place Viala, 34060 Montpellier Cedex 1, France
Laboratorio di Ecologia Forestale, Di.S.A.F.Ri. – Facoltà di Agraria, Università degli Studi della Tuscia, Via Camillo de Lellis, snc – 01100, Viterbo, Italy
AgroParisTech – ENGREF, GEEFT, 648 rue Jean-François Breton, BP 7355, 34086 Montpellier Cedex 4, France
R. Valentini
Laboratorio di Ecologia Forestale, Di.S.A.F.Ri. – Facoltà di Agraria, Università degli Studi della Tuscia, Via Camillo de Lellis, snc – 01100, Viterbo, Italy
M. Bernoux
Institut de Recherche pour le Développement, IRD, UR SeqBio, SupAgro, Bat 12, 2 place Viala, 34060 Montpellier Cedex 1, France