# These data are summarized in file: GP17_GTC_CTD_PICbad.csv # # For CST1035 data # At GP17 Station 18 (cast 3), the upcast profile data was contaminated by the likely interception of foreign material which resulted in # high and very scattered data from 2500 m to ~900 m. These data are summarized in file GP17_GTC_CTD__cpbad.csv # # ============= end of notes ==========15:T6b8,

Data Processing notes:

# Transmissometer data reduction CST1035
# CST1035 exhibits significant thermal hysteresis during profiling.
# Adjustments of profiles are set to match the transmissometer (CST1874) data from the ODF CTD.
# The main value of the derived beam attenuation coefficient "cp1035" is in the upper 500m.
# Transmittance values are used to correct the Birefringence data from sensor PIC010.
#
# these terms are described in Li et al. (2025) and in the parameter descriptions accompanying this data set.
#
# cst1035c=(cst1035-CST1035Z)/cst1035r
# cst1035cc=cst1035c+cst1035t*CST1035t_MULT-cum1035dr*CST1035DR_MULT
# tr1035=cst1035cc/CST1035NetVref
# cp1035=-4*ln(tr1035)+press*press_cft
# cp1035_sd=-4*ln((CST1035NetVref-cst1035_sd)/CST1035NetVref)
# cp1035_n=cst1035_n
#
# PIC sensor data reduction. PIC010
#
# pic010c=(pic010-PIC010Z-PIC010_V_CROSS*tr1035)/pic010r
# pic010simp=(pic010-PIC010Z-PIC010X)/pic010r+PIC010_PrCofft*press/1000
# pic010cc=pic010c/tr1035^0.5+PIC010_PrCofft*press/1000
# pic010Biref=pic010cc*PIC010_Birefringence
# pic010noTr_Biref=pic010simp*PIC010_Birefringence
# pic010Biref_sd=pic010_sd*PIC010_Birefringence
# pic010Biref_n=pic010_n
#
# Flourometer data reduction
#
# The main adjustment to data was to subtract readings found in deepwater
# The results are NOT absolutely calibrated in Chlorophyll units but are close
#
# Chl_flsp=flsp-flsp_z
# Chl_flsp_sd=flsp_sd
# Chl

04_GP17_GTC_CTD_Profile_Average_0500m_data_Submit.csv