@article{fdi:010078059,
  title = {{F}rom in situ to satellite observations of pelagic {S}argassum distribution and aggregation in the {T}ropical {N}orth {A}tlantic {O}cean},
  author = {{O}dy, {A}nouck and {T}hibaut, {T}. and {B}erline, {L}. and {C}hangeux, {T}homas and {A}ndr{\'e}, {J}ean-{M}ichel and {C}hevalier, {C}rist{\`e}le and {B}lanfune, {A}. and {B}lanchot, {J}ean and {R}uitton, {S}. and {S}tiger-{P}ouvreau, {V}. and {C}onnan, {S}. and {G}relet, {J}acques and {A}urelle, {D}. and {G}uene, {M}. and {B}ataille, {H}ubert and {B}achelier, {C}{\'e}line and {G}uillemain, {D}. and {S}chmidt, {N}. and {F}auvelle, {V}. and {G}uasco, {S}. and {M}{\'e}nard, {F}r{\'e}d{\'e}ric},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he present study reports on observations carried out in the {T}ropical {N}orth {A}tlantic in summer and autumn 2017, documenting {S}argassum aggregations using both ship-deck observations and satellite sensor observations at three resolutions ({MSI}-10 m, {OLCI}-300 m, {VIIRS}-750 m and {MODIS}-1 km). {B}oth datasets reported that in summer, {S}argassum aggregations were mainly observed off {B}razil and near the {C}aribbean {I}slands, while they accumulated near the {A}frican coast in autumn. {B}ased on in situ observations, we propose a five-class typology allowing standardisation of the description of in situ {S}argassum raft shapes and sizes. {T}he most commonly observed {S}argassum raft type was windrows, but large rafts composed of a quasi-circular patch hundreds of meters wide were also observed. {S}atellite imagery showed that these rafts formed larger {S}argassum aggregations over a wide range of scales, with smaller aggregations (of tens of m(2) area) nested within larger ones (of hundreds of km(2)). {M}atch-ups between different satellite sensors and in situ observations were limited for this dataset, mainly because of high cloud cover during the periods of observation. {N}evertheless, comparisons between the two datasets showed that satellite sensors successfully detected {S}argassum abundance and aggregation patterns consistent with in situ observations. {MODIS} and {VIIRS} sensors were better suited to describing the {S}argassum aggregation distribution and dynamics at {A}tlantic scale, while the new sensors, {OLCI} and {MSI}, proved their ability to detect {S}argassum aggregations and to describe their (sub-) mesoscale nested structure. {T}he high variability in raft shape, size, thickness, depth and biomass density observed in situ means that caution is called for when using satellite maps of {S}argassum distribution and biomass estimation. {I}mprovements would require additional in situ and airborne observations or very high-resolution satellite imagery.},
  keywords = {{ATLANTIQUE} {NORD}},
  booktitle = {},
  journal = {{PL}o{S} {O}ne},
  volume = {14},
  numero = {9},
  pages = {e0222584 [29 ]},
  ISSN = {1932-6203},
  year = {2019},
  DOI = {10.1371/journal.pone.0222584},
  URL = {https://www.documentation.ird.fr/hor/fdi:010078059},
}