@article{fdi:010046355,
  title = {{D}eep chlorophyll maximum and upper ocean structure interactions : case of the {G}uinea {T}hermal {D}ome},
  author = {{D}uteil, {O}. and {L}azar, {A}lban and {D}andonneau, {Y}ves and {W}ainer, {I}. and {M}enk{\`e}s, {C}hristophe},
  editor = {},
  language = {{ENG}},
  abstract = {{D}eep {C}hlorophyll {M}aximum ({DCM}) modifies the upper ocean heat capture distribution and thus impacts water column temperature and stratification, as well as biogeochemical processes. {T}his energetical role of the {DCM} is assessed using a 1 m-resolution 1{D} physical-biogeochemical model of the upper ocean, using climatological forcing conditions of the {G}uinea {D}ome ({GD}). {T}his zone has been chosen among others because a strong and shallow {DCM} is present all year round. {T}he results show that the {DCM} warms the seasonal thermocline by +2 degrees {C} in {S}eptember/{O}ctober and causes an increase of heat transfer from below into the mixed layer ({ML}) by vertical diffusion and entrainment, leading to a {ML} warming of about 0.3 degrees {C} in {O}ctober. {I}n the permanent thermocline, temperature decreases by up to 2 degrees {C}. {T}he result is a stratification increase of the water column by 0.3 degrees {C} m(-1) which improves the thermocline realism when compared with observations. {A}t the same time, the heating associated with the {DCM} is responsible for an increase of nitrate (+300%, 0.024 mu {M}), chlorophyll (+50%, 0.02 mu g l(-1)) and primary production (+45%: 10 mg {C} m(-2) day(-1)) in the {ML} during the entrainment period of {O}ctober. {T}he considered concentrations are small but this mechanism could be potentially important to give a better explanation of why there is a significant amount of nitrate in the {ML}. {T}he mechanisms associated with the {DCM} presence, no matter which temperature or biogeochemical tracers are concerned, are likely to occur in a wide range of tropical or subpolar regions; in these zones a pronounced {DCM} is present at least episodically at shallow or moderate depths. {T}hese results can be generalized to other thermal dome regions where relatively similar physical and biogeochemical structures are encountered. {A}fter testing different vertical resolutions (10 m, 5 m, 2.5 m, 1 m and 0.5 m), we show that using at least a 1 to vertical resolution model is mandatory to assess the energetical importance of the {DCM}.},
  keywords = {},
  booktitle = {},
  journal = {{J}ournal of {M}arine {R}esearch},
  volume = {67},
  numero = {2},
  pages = {239--271},
  ISSN = {0022-2402},
  year = {2009},
  URL = {https://www.documentation.ird.fr/hor/fdi:010046355},
}