bio_optics

 
  PI:              Chuck Trees
  dataset:         Bio Optical Profiler Data
  project/cruise:  Arabian Sea/TTN-053 - Process Cruise 6
  ship:            Thomas Thompson

Methodology and Protocols
PI Notes

  These data contain radiometric profile data binned to unit value
  meters, and include downwelling irradiance (E_d), upwelling
  irradiance(E_u) if available, upwelling radiance(L_u), and the
  corresponding derived diffuse attenuation coefficients (K_d, K_u, and L_u).

  Also included is the particulate beam attenuation coefficient,
  (660nm) minus C_water(660nm), the stimulated in-situ chlorophyll
  fluorescence, and the sea surface incident irradiance (E_s).
 
 
 Parameter       Description                                  Units

  event          event number from event log, as MMDDhhmm
  sta_std        Arabian Sea standard station identifier
  sta            station number from event log
  lat_n          nominal latitude (negative = south)          decimal degrees
  lon_n          nominal longitude (negative = west)          decimal degrees
  cast_type      downcast or upcast
  depth          depth of measurement                         meters
  Es_XXX         sea surface incident irradiance at           micro W/(cm^2 nm)
                    wavelength XXX 
  Ed_XXX         downwelling irradiance at wavlength XXX      micro W/(cm^2 nm)
                   Ed radiometric depth offset = -70.0cm
  Lu_XXX         upwelling radiance at wavelength XXX         micro W/(cm^2 sr nm)
                   Lu radiometric depth offset = 0.0cm
  Kd_XXX         diffuse attenuation coef. for Ed_XXX         meters^-1
  Kl_XXX         diffuse attenuation coef. for Lu_XXX         meters^-1
  beam_cp        particle beam attenuation coefficient        meters^-1
  fluor          chlorophyll_a fluorescence                   volts