@article{fdi:010079986,
  title = {{U}nderstanding {N}2{O} emissions in {A}frican ecosystems : assessments from a semi-arid savanna grassland in {S}enegal and sub-tropical agricultural fields in {K}enya},
  author = {{B}igaignon, {L}. and {D}elon, {C}. and {N}diaye, {O}. and {G}aly-{L}acaux, {C}. and {S}erca, {D}. and {G}u{\'e}rin, {F}r{\'e}d{\'e}ric and {T}allec, {T}. and {M}erbold, {L}. and {T}agesson, {T}. and {F}ensholt, {R}. and {A}ndre, {S}. and {G}alliau, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his study is based on the analysis of field-measured nitrous oxide ({N}2{O}) emissions from a {S}ahelian semi-arid grassland site in {S}enegal ({D}ahra), tropical humid agricultural plots in {K}enya ({M}bita region) and simulations using a 1{D} model designed for semi arid ecosystems in {D}ahra. {T}his study aims at improving present knowledge and inventories of {N}2{O} emissions from the {A}frican continent. {N}2{O} emissions were larger at the agricultural sites in the {M}bita region (range: 0.0 +/- 0.0 to 42.1 +/- 10.7 ng{N} m(-2) s(-1)) than at the {D}ahra site (range: 0.3 +/- 0 to 7.4 +/- 6.5 ng{N} m(-2) s(-1)). {S}oil water and nitrate ({NO}3-) contents appeared to be the most important drivers of {N}2{O} emissions in {D}ahra at the seasonal scale in both regions. {T}he seasonal pattern of modelled {N}2{O} emissions is well represented, though the model performed better during the rainy season than between the rainy and dry seasons. {T}his study highlighted that the water-filled pore space threshold recognised as a trigger for {N}2{O} emissions should be reconsidered for semi-arid ecosystems. {B}ased on both measurements and simulated results, an annual {N}2{O} budget was estimated for {A}frican savanna/grassland and agricultural land ranging between 0.17-0.26 and 1.15-1.20 {T}g{N} per year, respectively.},
  keywords = {nitrogen ; {GHG} ; chambers ; modelling ; tropical ecosystems ; {SENEGAL} ; {KENYA} ; {DAHRA} ; {MBITA} {REGION} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{S}ustainability},
  volume = {12},
  numero = {21},
  pages = {8875 [26 p.]},
  year = {2020},
  URL = {https://www.documentation.ird.fr/hor/fdi:010079986},
}