@article{fdi:010044235,
  title = {{S}patial and temporal variations in dissolved and particulate organic nitrogen in the equatorial {P}acific : biological and physical influences},
  author = {{W}ang, {X}. {J}. and {L}e {B}orgne, {R}obert and {M}urtugudde, {R}. and {B}usalacchi, {A}. {J}. and {B}ehrenfeld, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}o quote {L}ibby and {W}heeler (1997), "we have only a cursory knowledge of the distributions of dissolved and particulate organic nitrogen" in the equatorial {P}acific. {A} decade later, we are still in need of spatial and temporal analyses of these organic nitrogen pools. {T}o address this issue, we employ a basin scale physical-biogeochemical model to study the spatial and temporal variations of dissolved organic nitrogen ( {DON}) and particulate organic nitrogen ({PON}). {T}he model is able to reproduce many observed features of nitrate, ammonium, {DON} and {PON} in the central and eastern equatorial {P}acific, including the asymmetries of nitrate and ammonium, and the meridional distributions of {DON} and {PON}. {M}odeled {DON} (5-8 mmol m(-3)) shows small zonal and meridional variations in the mixed layer whereas modeled {PON} (0.4-1.5 mmol m(-3)) shows considerable spatial variability. {W}hile there is a moderate seasonality in both {DON} and {PON} in the mixed layer, there is a much weaker interannual variability in {DON} than in {PON}. {T}he interannual variability in {PON} is largely associated with the {E}l {N}ino/{S}outhern {O}scillation ({ENSO}) phenomenon, showing high values during cold {ENSO} phase but low values during warm {ENSO} phase. {O}verall, {DON} and {PON} have significant positive correlations with phytoplankton and zooplankton in the mixed layer, indicting the biological regulation on distribution of organic nitrogen. {H}owever, the relationships with phytoplankton and zooplankton are much weaker for {DON} (r=0.18-0.71) than for {PON} (r=0.25-0.97). {S}uch a difference is ascribed to a relatively larger degree of physical control (e.g., upwelling of low-organic-{N} deep waters into the surface) on {DON} than {PON}.},
  keywords = {},
  booktitle = {},
  journal = {{B}iogeosciences},
  volume = {5},
  numero = {6},
  pages = {1705--1721},
  ISSN = {1726-4170},
  year = {2008},
  URL = {https://www.documentation.ird.fr/hor/fdi:010044235},
}