@article{fdi:010068092,
  title = {{M}odelling nitrite dynamics and associated feedback processes in the {B}enguela oxygen minimum zone},
  author = {{M}ashifane, {T}. {B}. and {V}ichi, {M}. and {W}aldron, {H}. {N}. and {M}achu, {E}ric and {G}arcon, {V}.},
  editor = {},
  language = {{ENG}},
  abstract = {{U}nderstanding nitrite dynamics in oxygen minimum zones ({OMZ}s) is a challenge as it represents an intermediary nitrogen species with a short turnover time. {N}itrite is also reduced to nitrogen in {OMZ}s, preventing its accumulation. {T}his creates difficulties in detecting nitrite with calorimetric methods as concentrations may occur below detection limits in some regions. {N}itrite concentrations are key to understanding intermediate nitrogen processes and their implication for nitrogen loss in {OMZ}s. {A} coupled physical-biogeochemical model is applied in the {B}enguela {OMZ} to study nitrite dynamics and its associated feedback processes. {S}imulated results show occurrence of primary and secondary nitrite maxima in the {B}enguela shelf waters. {T}he primary nitrite maxima in the {B}enguela are attributed to nitrification and nitrate assimilation as they occur in association with the nitracline. {S}econdary nitrite maxima accumulate in the {A}ngola-{B}enguela {F}ront ({ABF}) {OMZ} and are attributed to denitrification. {T}he secondary nitrite maxima are consumed by anaerobic ammonium oxidation (anammox) off {W}alvis {B}ay. {N}itrite maxima are restricted to the shelf off {W}alvis {B}ay and adverted offshore in the {ABF} region. {I}nterchanges between the poleward {S}outh {A}tlantic {C}entral {W}ater ({SACW}) and the equatorward, well aerated {E}astern {S}outh {A}tlantic {C}entral {W}ater ({ESACW}) drive the seasonality of nitrogen processes in the {B}enguela. {S}ubsequent nitrite reduction in the {B}enguela {OMZ} leads to nitrous oxide production, with high concentrations occurring in the {ABF} region as a result of nitrification and denitrification. {O}ff {W}alvis {B}ay, nitrous oxide production is low since nitrite is consumed by anammox. {N}itrous oxide production occurs in thermocline, intermediate and deeper water masses in the {ABF} region. {H}igh {N} fluxes in the {B}enguela are attributed to nitrification as compared to anammox and denitrification. {R}esults from this study demonstrate the role of intermediate nitrogen species in nitrogen feedback processes in the {B}enguela and can be applied in other regions.},
  keywords = {{A}nammox ; {B}enguela ; {D}enitrification ; {O}xygen minimum zone ; {N}itrite ; {N}itrous oxide ; {ATLANTIQUE} {SUD} ; {BENGUELA} {COURANT}},
  booktitle = {},
  journal = {{C}ontinental {S}helf {R}esearch},
  volume = {124},
  numero = {},
  pages = {200--212},
  ISSN = {0278-4343},
  year = {2016},
  DOI = {10.1016/j.csr.2016.05.004},
  URL = {https://www.documentation.ird.fr/hor/fdi:010068092},
}