@article{fdi:010077892,
  title = {{P}hysical drivers of the nitrate seasonal variability in the {A}tlantic cold tongue},
  author = {{R}adenac, {M}arie-{H}{\'e}l{\`e}ne and {J}ouanno, {J}ulien and {T}chamabi, {C}hristine {C}arine and {A}wo, {M}. and {B}ourl{\`e}s, {B}ernard and {A}rnault, {S}abine and {A}umont, {O}livier},
  editor = {},
  language = {{ENG}},
  abstract = {{O}cean color observations show semiannual variations in chlorophyll in the {A}tlantic cold tongue with a main bloom in boreal summer and a secondary bloom in {D}ecember. {I}n this study, ocean color and in situ measurements and a coupled physical-biogeochemical model are used to investigate the processes that drive this variability. {R}esults show that the main phytoplankton bloom in {J}uly-{A}ugust is driven by a strong vertical supply of nitrate in {M}ay-{J}uly, and the secondary bloom in {D}ecember is driven by a shorter and moderate supply in {N}ovember. {T}he upper ocean nitrate balance is analyzed and shows that vertical advection controls the nitrate input in the equatorial euphotic layer and that vertical diffusion and meridional advection are key in extending and shaping the bloom off {E}quator. {B}elow the mixed layer, observations and modeling show that the {E}quatorial {U}ndercurrent brings low-nitrate water (relative to off-equatorial surrounding waters) but still rich enough to enhance the cold tongue productivity. {O}ur results also give insights into the influence of intraseasonal processes in these exchanges. {T}he submonthly meridional advection significantly contributes to the nitrate decrease below the mixed layer.},
  keywords = {{ATLANTIQUE}},
  booktitle = {},
  journal = {{B}iogeosciences},
  volume = {17},
  numero = {2},
  pages = {529--545},
  ISSN = {1726-4170},
  year = {2020},
  DOI = {10.5194/bg-17-529-2020},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077892},
}