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Understanding N2O e...
Understanding N2O emissions in african ecosystems : Assessments from a semi-arid savanna grassland in senegal and sub-tropical agricultural fields in Kenya
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- Bigaignon, Laurent (author)
- Université Paul Sabatier
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- Delon, Claire (author)
- Université Paul Sabatier
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- Ndiaye, Ousmane (author)
- Senegalese Institute Of Agricultural Research (ISRA)
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- Galy-Lacaux, Corinne (author)
- Université Paul Sabatier
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- Serça, Dominique (author)
- Université Paul Sabatier
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- Guérin, Frédéric (author)
- Université Paul Sabatier
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- Tallec, Tiphaine (author)
- Université Paul Sabatier
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- Merbold, Lutz (author)
- Agroscope,International Livestock Research Institute Nairobi
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- Tagesson, Torbern (author)
- Lund University,Lunds universitet,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science,University of Copenhagen
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- Fensholt, Rasmus (author)
- University of Copenhagen
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- André, Sylvain (author)
- Université Paul Sabatier
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- Galliau, Sylvain (author)
- Université Paul Sabatier
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(creator_code:org_t)
- 2020-10-26
- 2020
- English 26 s.
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In: Sustainability (Switzerland). - : MDPI AG. - 2071-1050. ; 12:21
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Abstract
Subject headings
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- This study is based on the analysis of field-measured nitrous oxide (N2 O) emissions from a Sahelian semi-arid grassland site in Senegal (Dahra), tropical humid agricultural plots in Kenya (Mbita region) and simulations using a 1D model designed for semi arid ecosystems in Dahra. This study aims at improving present knowledge and inventories of N2 O emissions from the African continent. N2 O emissions were larger at the agricultural sites in the Mbita region (range: 0.0 ± 0.0 to 42.1 ± 10.7 ngN m−2 s−1) than at the Dahra site (range: 0.3 ± 0 to 7.4 ± 6.5 ngN m−2 s−1). Soil water and nitrate (NO3−) contents appeared to be the most important drivers of N2 O emissions in Dahra at the seasonal scale in both regions. The seasonal pattern of modelled N2 O emissions is well represented, though the model performed better during the rainy season than between the rainy and dry seasons. This study highlighted that the water-filled pore space threshold recognised as a trigger for N2 O emissions should be reconsidered for semi-arid ecosystems. Based on both measurements and simulated results, an annual N2 O budget was estimated for African savanna/grassland and agricultural land ranging between 0.17–0.26 and 1.15–1.20 TgN per year, respectively.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)
Keyword
- Chambers
- GHG
- Modelling
- Nitrogen
- Tropical ecosystems
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Bigaignon, Laure ...
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Delon, Claire
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Ndiaye, Ousmane
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Galy-Lacaux, Cor ...
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Serça, Dominique
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Guérin, Frédéric
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show more...
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Tallec, Tiphaine
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Merbold, Lutz
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Tagesson, Torber ...
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Fensholt, Rasmus
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André, Sylvain
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Galliau, Sylvain
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Physical Geograp ...
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Sustainability ( ...
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Lund University