@article{fdi:010063136,
  title = {{I}mpact of eddies on surface chlorophyll in the {S}outh {I}ndian {O}cean},
  author = {{D}ufois, {F}. and {H}ardman-{M}ountford, {N}. {J}. and {G}reenwood, {J}. and {R}ichardson, {A}. {J}. and {F}eng, {M}. and {H}erbette, {S}teven and {M}atear, {R}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A} unique feature of the subtropical {S}outh {I}ndian {O}cean is the existence of anticyclonic eddies that have higher chlorophyll concentrations than cyclonic eddies. {O}ff {W}estern {A}ustralia, this anomalous behavior is related to the seeding of anticyclonic eddies with shelf water enriched in phytoplankton biomass and nutrients. {F}urther off-shore, two mechanisms have been suggested to explain the eddy/chlorophyll relationship: (i) eddies originating from the {A}ustralian coast maintain their chlorophyll anomaly while propagating westward; and (ii) eddy-induced {E}kman upwelling (downwelling) enhances (dampens) nutrient supply in anticyclonic (cyclonic) eddies. {H}ere we describe the relationship between eddies and surface chlorophyll within the {S}outh {I}ndian {O}cean, and discuss possible mechanisms to explain the anomalous behavior in light of new analyses performed using satellite chlorophyll data. {W}e show that anticyclonic eddies exhibit higher surface chlorophyll concentration than cyclonic eddies across the entire {S}outh {I}ndian {O}cean basin (from 20 to 28 degrees {S}), particularly in winter. {U}sing {S}elf {O}rganizing {M}aps we analyze the chlorophyll patterns within anticyclonic eddies and cyclonic eddies and highlight their complexity. {O}ur analysis suggests that multiple mechanisms may underlie the observed eddy/chlorophyll relationship. {B}ased on {A}rgo float data, we postulate the relationship may be partly related to seasonal adjustment of the mixed layer depth within eddies. {D}eeper mixing in anticyclonic eddies is expected to enhance nutrient supply to the mixed layer, while shallower mixing in cyclonic eddies is expected to reduce it. {T}his could explain why the observed winter surface chlorophyll bloom is stronger in anticyclonic eddies than in cyclonic eddies.},
  keywords = {{E}ddies ; chlorophyll ; self-organizing map ; convective mixing ; eddy-induced {E}kman pumping ; {OCEAN} {INDIEN}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {O}ceans},
  volume = {119},
  numero = {11},
  pages = {8061--8077},
  ISSN = {2169-9275},
  year = {2014},
  DOI = {10.1002/2014jc010164},
  URL = {https://www.documentation.ird.fr/hor/fdi:010063136},
}