The NAAMES Bio-Argo floats send their profiles to the UMaine server. The data is processed and rendered in near real-time. The different level of data are available on our ftp and are described below:

  • RAW: all msg and log received from Navis BGCi including incomplete files due to early end of transmission.
  • RAW_EOT: only complete msg and log are kept.
  • L0: hexadecimal data stored in msg is decoded in decimal numbers and cnverted to csv files.
  • L1: calibrate level 0 data using manufacturer calibration.
  • L2: adjust and correct the data and compute additional product.
    • fchl is corrected for non-photochemical quenching (Xing et al. 2012)
    • bbp is computed from beta (Zhang et al, 2009, Sullivan et al. 2013)
    • POC is computed from bbp
    • C_phyto is computed from bbp
Calibration parameters used are available here.

Table 1. List of parameters.

Variable Description Units
profileprofile number-
dtdate and timeyyyy/mm/dd hh:mm
latlatitudedecimal degree North
lonlongitudedecimal degree East
tin-situ temperature ITS-90deg C
sppratical salinity PSS-78no units
o2oxygen concentrationμmol/kg
fchlchlorophyll a fluorescencemg m-3
betaangular scatterance at 700 nm with a scattering angle of 124m-1 sr-1
fdomfluorescent colored dissolved organic matter (CDOM)mg m-3
ed###downwelling irradiance at ### nmW m-2 nm-1
parphotosynthetically available radiationμmol photons m-2 s-1
bbpparticulate backscatter at 700 nmm-1
C_phytophytoplnakton carbonmg m-3
POCparticulate organic carbonmg m-3


Sullivan, J. M., M. S. Twardowski, J. Ronald, V. Zaneveld, and C. C. Moore (2013), Measuring optical backscattering in water, in Light Scattering Reviews 7, Springer Praxis Books, edited by A. A. Kokhanovsky, pp. 189–224, Springer, Berlin, doi:10.1007/978-3-642-21907-8_6.

Zhang, X., L. Hu, and M.-X. He (2009), Scattering by pure seawater: Effect of salinity, Opt. Express, 17(7), 5698–5710, doi:10.1364/OE.17.012685.

Xing, X., H. Claustre, S. Blain, F. D’Ortenzio, D. Antoine, J. Ras, and C. Guinet (2012), Quenching correction for in vivo chlorophyll fluorescence acquired by autonomous platforms: A case study with instrumented elephant seals in the Kerguelen region (Southern Ocean), Limnol. Oceanogr. Methods, 10(7), 483–495, doi:10.4319/lom.2012.10.483.