@article{fdi:010036707,
  title = {{R}emote sensing of phytoplankton groups in case 1 waters from global {S}ea{W}i{FS} imagery},
  author = {{A}lvain, {S}. and {M}oulin, {C}. and {D}andonneau, {Y}ves and {B}reon, {F}. {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{O}cean color sensors enable a quasi-permanent monitoring of the chlorophyll a concentration ({C}h1 a) in surface waters. {T}his ubiquitous photosynthetic pigment cannot, however, be used to distinguish between phytoplankton species. {D}istinguishing phytoplankton groups from space is nevertheless necessary to better study some biochemical processes such as carbon fixation at the global scale, and is thus one of the major challenges of ocean color research. {I}n situ data have shown that the water-leaving radiances (n{L}w), measured by ocean color sensors at different wavelengths in the visible spectrum, vary significantly for a given {C}h1 a. {T}his natural variability is due partly to differences in optical properties of phytoplankton species. {H}ere, we derive relationships between n{L}w and phytoplankton species by using a large set of quantitative inventories of phytoplankton pigments collected during nine cruises from {L}e {H}avre ({F}rance) to {N}oumea ({N}ew {C}aledonia) in the framework of the {G}e{P}&{CO} program. {C}oincident {S}ea{W}i{FS} n{L}w data between 412 and 555 nm are extracted and normalized to remove the effect of {C}h1 a. {T}hese normalized spectra vary significantly with in situ pigment composition, so that four major phytoplankton groups, i.e., haptophytes, {P}rochlorococcus, {S}ynechocoecus-like cyanobacteria and diatoms, can be distinguished. {T}his classification ({PHYSAT}) is applied to the global {S}ea{W}i{FS} dataset for year 2001, and global maps of phytoplankton groups are presented. {H}aptophytes and diatoms are found mostly in high latitudes and in eutrophic regions. {D}iatoms show a strong seasonal cycle with large-scale blooms during spring and summer. {T}hese results, obtained with only five channels in the visible spectrum, demonstrate that ocean color measurements can be used to discriminate between dominant phytoplankton groups provided that sufficient data are available to establish the necessary empirical relationships. (c) 2005 {E}lsevier {L}td. {A}ll rights reserved.},
  keywords = {water color ; remote sensing ; phytoplankton ; in situ measurements ; {S}ea{W}i{F}s ; optical properties ; global ; {N}orth {A}tlantic ; equatorial {P}acific},
  booktitle = {},
  journal = {{D}eep {S}ea {R}esearch : {P}art {I}.{O}ceanographic {R}esearch {P}apers},
  volume = {52},
  numero = {11},
  pages = {1989--2004},
  ISSN = {0967-0637},
  year = {2005},
  DOI = {10.1016/j.dsr.2005.06.015},
  URL = {https://www.documentation.ird.fr/hor/fdi:010036707},
}