@article{fdi:010079573, title = {{M}onitoring the influence of the mesoscale ocean dynamics on phytoplanktonic plumes around the {M}arquesas islands using multi-satellite missions}, author = {{C}assianides, {A}. and {M}artinez, {E}lodie and {M}aes, {C}hristophe and {C}arton, {X}. and {G}orgues, {T}homas}, editor = {}, language = {{ENG}}, abstract = {{T}he {M}arquesas islands are a place of strong phytoplanktonic enhancement, whose original mechanisms have not been explained yet. {S}everal mechanisms such as current-bathymetry interactions or island run-off can fertilize waters in the immediate vicinity or downstream of the islands, allowing phytoplankton enhancement. {H}ere, we took the opportunity of an oceanographic cruise carried out at the end of 2018, to combine in situ and satellite observations to investigate two phytoplanktonic blooms occurring north and south of the archipelago. {F}irst, {L}agrangian diagnostics show that both chlorophyll-a concentrations ({C}hl) plumes are advected from the islands. {S}econd, the use of {F}inite-size {L}yaponov {E}xponent and frontogenesis diagnostics reveal how the {C}hl plumes are shaped by the passage of a mesoscale cyclonic eddy in the south and by a converging front and finer-scale dynamic activity in the north. {O}ur results based on these observations provide clues to the hypothesis of a fertilization from the islands themselves allowing phytoplankton to thrive. {T}hey also highlight the role of advection to disperse and shape the {C}hl plumes in two regions with contrasting dynamical regimes.}, keywords = {mesoscale dynamics ; chlorophyll-a concentration variability ; coastal fertilization ; horizontal advection ; {M}arquesas islands ; {POLYNESIE} {FRANCAISE} ; {MARQUISES} {ILES}}, booktitle = {}, journal = {{R}emote {S}ensing}, volume = {12}, numero = {16}, pages = {2520 [10 p.]}, year = {2020}, DOI = {10.3390/rs12162520}, URL = {https://www.documentation.ird.fr/hor/fdi:010079573}, }