@article{PAR00010520,
  title = {{UV}/{PAR} radiation and {DOM} properties in surface coastal waters of the {C}anadian shelf of the {B}eaufort {S}ea during summer 2009},
  author = {{P}ara, {J}. and {C}harri{\`e}re, {B}. and {M}atsuoka, {A}. and {M}iller, {W}. {L}. and {R}ontani, {J}. {F}. and {S}emp{\'e}r{\'e}, {R}ichard},
  editor = {},
  language = {{ENG}},
  abstract = {{S}urface waters from the {B}eaufort {S}ea in the {A}rctic {O}cean were evaluated for dissolved organic carbon ({DOC}), and optical characteristics including {UV} (ultraviolet) radiation and {PAR} (photosynthetically active radiation) diffuse attenuation ({K}-d), and chromophoric and fluorescent dissolved organic matter ({CDOM} and {FDOM}) as part of the {MALINA} field campaign (30 {J}uly to 27 {A}ugust). {S}pectral absorption coefficients (a({CDOM}) (350 nm) (m(-1))) were significantly correlated to both diffuse attenuation coefficients ({K}-d) in the {UV}-{A} and {UV}-{B} and to {DOC} concentrations. {T}his indicates {CDOM} as the dominant attenuator of both {UV} and {PAR} solar radiation and suggests its use as an optical proxy for {DOC} concentrations in this region. {W}hile the {M}ackenzie input is the main driver of {CDOM} dynamics in low salinity waters, locally, primary production can create significant increases in {CDOM}. {E}xtrapolating {CDOM} to {DOC} relationships, we estimate that similar to 16% of the {DOC} in the {M}ackenzie {R}iver does not absorb radiation at 350 nm. {T}he discharges of {DOC} and its chromophoric subset ({CDOM}) by the {M}ackenzie {R}iver during the {MALINA} cruise are estimated as similar to 0.22 {T}g{C} and 0.18 {T}g{C}, respectively. {T}hree dissolved fluorescent components ({C}1-{C}3) were identified by fluorescence excitation/emission matrix spectroscopy ({EEMS}) and parallel factor ({PARAFAC}) analysis. {O}ur results showed an aquatic dissolved organic matter ({DOM}) component ({C}1), probably produced in the numerous lakes of the watershed, that co-dominated with a terrestrial humic-like component ({C}2) in the {M}ackenzie {D}elta {S}ector. {T}his aquatic {DOM} could partially explain the high {CDOM} spectral slopes observed in the {B}eaufort {S}ea.},
  keywords = {{CANADA} ; {ARCTIQUE} ; {BEAUFORT} {MER}},
  booktitle = {},
  journal = {{B}iogeosciences},
  volume = {10},
  numero = {4},
  pages = {2761--2774},
  ISSN = {1726-4170},
  year = {2013},
  DOI = {10.5194/bg-10-2761-2013},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00010520},
}