FN Archimer Export Format
PT J
TI Monitoring the Influence of the Mesoscale Ocean Dynamics on Phytoplanktonic Plumes around the Marquesas Islands Using Multi-Satellite Missions
BT 
AF Cassianides, Angelina
   Martinez, Elodie
   Maes, Christophe
   Carton, Xavier
   Gorgues, Thomas
AS 1:1;2:3;3:3;4:2;5:3;
FF 1:PDG-ODE-LOPS-OH;2:;3:;4:;5:;
C1 Laboratoire d’Océanographie Physique et Spatiale (LOPS), IUEM Brest, University of Brest, CNRS, IRD, Ifremer, 29200 Brest, France
   Laboratoire d’Océanographie Physique et Spatiale (LOPS), IUEM Brest, University of Brest, CNRS, IRD, Ifremer, 29200 Brest, France
   Laboratoire d’Océanographie Physique et Spatiale (LOPS), IUEM Brest, University of Brest, CNRS, IRD, Ifremer, 29200 Brest, France
C2 IFREMER, FRANCE
   UBO, FRANCE
   IRD, FRANCE
SI BREST
SE PDG-ODE-LOPS-OH
UM LOPS
IN WOS Ifremer UMR
   WOS Cotutelle UMR
   DOAJ
   copubli-france
   copubli-p187
   copubli-univ-france
IF 2.1
TC 3
UR https://archimer.ifremer.fr/doc/00649/76115/77077.pdf
   https://archimer.ifremer.fr/doc/00649/76115/77078.pdf
LA English
DT Article
CR MOANA-MATY 2018
BO Alis
DE ;mesoscale dynamics;chlorophyll-a concentration variability;coastal fertilization;horizontal advection;Marquesas islands
AB The Marquesas islands are a place of strong phytoplanktonic enhancement, whose original mechanisms have not been explained yet. Several 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. Here, 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. First, Lagrangian diagnostics show that both chlorophyll-a concentrations (Chl) plumes are advected from the islands. Second, the use of Finite-size Lyaponov Exponent and frontogenesis diagnostics reveal how the Chl 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. Our results based on these observations provide clues to the hypothesis of a fertilization from the islands themselves allowing phytoplankton to thrive. They also highlight the role of advection to disperse and shape the Chl plumes in two regions with contrasting dynamical regimes 
PY 2020
PD AUG
SO Remote Sensing
SN 2072-4292
PU MDPI AG
VL 12
IS 16
UT 000565441700001
DI 10.3390/rs12162520
ID 76115
ER

EF