@article{fdi:010082720,
  title = {{W}ater column poly-aromatic hydrocarbon anomalies measured with submersible gliders in the {A}ngolan natural oil seepage province},
  author = {{J}atiault, {R}. and {D}hont, {D}. and {B}esson, {F}. and {T}edetti, {M}arc and de {F}ommervault, {O}. {P}. and {L}oncke, {L}. and {B}ourrin, {F}. and {G}outx, {M}. and de {M}adron, {X}. {D}.},
  editor = {},
  language = {{ENG}},
  abstract = {{F}luorescence sensors mounted on unmanned underwater gliders open new ways of investigation to detect dissolved hydrocarbons in seawater. {A} glider was deployed for 20 days to monitor biogeochemical and physical signals associated with natural hydrocarbon seepages within the first 700 m in the {A}ngolan waters. {T}he glider was equipped with fluorometers ({M}ini{F}luo-{UV}) to measure the concentrations of polycyclic aromatic hydrocarbons ({PAH}) of interest, i.e. naphthalene, phenanthrene, fluorene and pyrene. {A} continuous {PAH}-like signal detected within the 70 m layer below the sea surface is associated with high chlorophyll concentration in the deep chlorophyll maximum. {V}ertical {PAH}-like anomalies forming either strong spikes or diffuse columns down to 700 m are observed at the exact location of oil seep sites identified on {S}ynthetic {A}perture {R}adar satellite images. {A}n similar to 200 m thick layer of enhanced {PAH}-like concentration, topped by a thermo/pycnocline identified at 280-300 m water depth, is measured in concomitance with the decrease in oxygen concentration. {T}he concomitance of these signals suggests that lower oxygen concentrations induce a preservation of hydrocarbons within the eastern {A}tlantic oxygen minimum zone. {E}ven if the absence of in-situ measurements limits the understanding of physical and biogeochemical processes affecting {PAH} concentrations, the measurements conducted at the edges of the {OMZ} suggests a relationship with microbial activity and organic matter dynamics in this layer. {T}he results presented here show that gliders equipped with {PAH} sensors represent a promising means for monitoring hydrocarbons in the oceans, especially when they are coupled with other systems (i.e. {S}ynthetic {A}perture {R}adar).},
  keywords = {{G}lider ; {F}luorescence ; {P}olycyclic aromatic hydrocarbons ; {S}eeps ; {O}xygen minimum zone ; {ANGOLA} ; {ATLANTIQUE} ; {CONGO} {BASSIN}},
  booktitle = {},
  journal = {{D}eep-{S}ea {R}esearch {P}art {I} : {O}ceanographic {R}esearch {P}apers},
  volume = {175},
  numero = {},
  pages = {103588 [16 p.]},
  ISSN = {0967-0637},
  year = {2021},
  DOI = {10.1016/j.dsr.2021.103588},
  URL = {https://www.documentation.ird.fr/hor/fdi:010082720},
}