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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
An outlook on the Sub-Saharan Africa carbon balance
Biogeosciences, Volume 6, No. 10, Year 2009
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Description
This study gives an outlook on the carbon balance of Sub-Saharan Africa (SSA) by presenting a summary of currently available results from the project CarboAfrica (namely net ecosystem productivity and emissions from fires, deforestation and forest degradation, by field and model estimates) supplemented by bibliographic data and compared with a new synthesis of the data from national communications to UNFCCC. According to these preliminary estimates the biogenic carbon balance of SSA varies from 0.16 Pg C y-1 to a much higher sink of 1.00 Pg C y-1 (depending on the source data). Models estimates would give an unrealistic sink of 3.23 Pg C y-1, confirming their current inadequacy when applied to Africa. The carbon uptake by forests and savannas (0.34 and 1.89 Pg C y-1, respectively,) are the main contributors to the resulting sink. Fires (0.72 Pg C y-1) and deforestation (0.25 Pg C y-1) are the main contributors to the SSA carbon emissions, while the agricultural sector and forest degradation contributes only with 0.12 and 0.08 Pg C y-1, respectively. Savannas play a major role in shaping the SSA carbon balance, due to their large extension, their fire regime, and their strong interannual NEP variability, but they are also a major uncertainty in the overall budget. Even if fossil fuel emissions from SSA are relative low, they can be crucial in defining the sign of the overall SSA carbon balance by reducing the natural sink potential, especially in the future. This paper shows that Africa plays a key role in the global carbon cycle system and probably could have a potential for carbon sequestration higher than expected, even if still highly uncertain. Further investigations are needed, particularly to better address the role of savannas and tropical forests and to improve biogeochemical models. The CarboAfrica network of carbon measurements could provide future unique data sets for better estimating the African carbon balance. © Author(s) 2009.
Authors & Co-Authors
Bombelli, A.
Italy, Viterbo
Università Degli Studi Della Tuscia Viterbo
Henry, Matieu
Italy, Viterbo
Università Degli Studi Della Tuscia Viterbo
France, Montpellier
Ird Centre de Montpellier
France, Palaiseau
Agroparistech
Castaldi, S.
Italy, Naples
Università Degli Studi Della Campania Luigi Vanvitelli
Adu-Bredu, Stephen
Ghana, Kumasi
Csir - Forestry Research Institute of Ghana
Arneth, Almut
Sweden, Lund
Institutionen För Naturgeografi Och Ekosystemvetenskap, Lunds Universitet
De Grandcourt, A.
France, Paris
Cirad
Congo
Unité de Recherche Sur la Productivité Des Plantations Industrielles (ur2pi)
Grieco, E.
Italy, Viterbo
Università Degli Studi Della Tuscia Viterbo
Kutsch, Werner Leo
Germany, Jena
Max Planck Institute for Biogeochemistry
Lehsten, Veiko
Sweden, Lund
Institutionen För Naturgeografi Och Ekosystemvetenskap, Lunds Universitet
Rasile, A.
Italy, Naples
Università Degli Studi Della Campania Luigi Vanvitelli
Reichstein, Markus
Germany, Jena
Max Planck Institute for Biogeochemistry
Tansey, Kevin J.
United Kingdom, Leicester
University of Leicester
Weber, Ulrich
Germany, Jena
Max Planck Institute for Biogeochemistry
Valentini, Riccardo
Italy, Viterbo
Università Degli Studi Della Tuscia Viterbo
Italy, Lecce
Fondazione Centro Euro-mediterraneo Sui Cambiamenti Climatici
Statistics
Citations: 101
Authors: 14
Affiliations: 11
Identifiers
Doi:
10.5194/bg-6-2193-2009
e-ISSN:
17264189
Research Areas
Environmental