Standardized Fields and Units

Below is a table of the standard field names and associated units for use in submitting data to the SeaBASS bio-optical archive. The field names are NOT case sensitive. Use the search bar or the find function in your browser to search the table for words or patterns found in the field names, units or descriptions.

 

Special notes regarding wavelength-specific measurements: There are two different ways to indicate wavelengths in a SeaBASS file. If metadata such as date, location or depth vary within a file, then wavelength should be appended to the field name for every measurement combination. For example, downwelling irradiance measured at 412.3 nm would become 'Ed412.3' (listed along with any other Ed measurements, like Ed416.2, Ed419, etc), or aerosol optical thickness measured at 1020 nm would become 'AOT1020'. Alternately, if date, location and depth are assumed to be approximately constant for all measurements in the file, then use the field 'wavelength' to provide a column of the measured wavelengths and don't include them as part of the field names (this organization is commonly used for reporting spectrophotometry measurements).

 

To provide additional information about a field, for example, the standard deviation of the reported average of replicate measurements, refer to the table of field name modifiers below. For example, "chl_sd" or "ag510_sd". More information and examples can be found in the tables of suffixes and modifiers. Please contact SeaBASS staff if you want to discuss adding new fields.

 

Notes on HPLC pigment field names



Table of Contents


Table of Field Names and Units

 
 
Field name Units Description
a 1/m Total absorption coefficient (aw + ap + ag)
a*ph m^2/mg Chlorophyll a specific absorption coefficient
a*srfa m^2/mg Specific absorption coefficient of Suwanee River Fulvic Acid standard
aaer 1/m Absorption coefficient of atmospheric aerosols
abs unitless Absorbance
abs* m^2/mg Carbon specific absorbance
abs_ad unitless Absorbance (Optical Density) of non-algal detritus
abs_ag unitless Absorbance (Optical Density) of Gelbstoff
abs_ap unitless Absorbance (Optical Density) of particles (ad + aph)
abs_blank_ad unitless Absorbance of a blank (or unused) filter pad for non-algal detritus.
abs_blank_ag unitless Absorbance of a blank (or unused) filter pad for Gelbstoff.
abs_blank_ap unitless Absorbance of a blank (or unused) filter pad for particles.
abs_nacl unitless Absorbance of NaCl solution (use with the _###ppt suffix)
abundance none Number of cells observed (to specify a particular taxonomic type, see "_abun" in Table of Field Name Suffixes)
ad 1/m Absorption coefficient of non-algal detritus
ad_unc 1/m Accumulated estimate of standard uncertainty associated with the derivation of the absorption coefficient of non-algal detritus (ad) via error propogation through the absoption equation. See section 5.3.3 of NASA and IOCCG's "Inherent Optical Property Measurements and Protocols: Absorption Coefficient" (2017).
adg 1/m Absorption coefficient of non-algal detritus + Gelbstoff (ad + ag)
ag 1/m Absorption coefficient of Gelbstoff
agp 1/m Absorption coefficient of Gelbstoff + particles (ag + ap)
asrfa 1/m Absorption coefficient of Suwanee River Fulvic Acid standard
Allo mg/m^3 HPLC Alloxanthin
alpha-beta-Car mg/m^3 HPLC Alpha (Beta,epsilon) + Beta (Beta,beta) Carotenes
altitude m Altitude above sea level
am unitless Airmass
AMC umol Concentration of 7-Amino-4-methylcoumarin's fluorescent molecules without an associated substrate (used for the calibration curve in flow cytometry).
AMC-Leu umol/L/hr Rate of substrate cleavage for L-Leucine-7-amido-4-methylcoumarin hydrochloride
angstrom unitless Angstrom exponent
Anth mg/m^3 HPLC Antheraxanthin
AOT unitless Aerosol Optical Thickness (sometimes referred to as tau or taua)
ap 1/m Absorption coefficient of particles (ad + aph)
ap_unc 1/m Accumulated estimate of standard uncertainty associated with the derivation of the absorption coefficient of particles (ap) via error propogation through the absoption equation. See section 5.3.3 of NASA and IOCCG's "Inherent Optical Property Measurements and Protocols: Absorption Coefficient" (2017).
aph 1/m Absorption coefficient of phytoplankton
aph_unc 1/m Accumulated estimate of standard uncertainty associated with the derivation of the absorption coefficient of phytoplankton (aph) via error propogation through the absoption equation. See section 5.3.3 of NASA and IOCCG's "Inherent Optical Property Measurements and Protocols: Absorption Coefficient" (2017).
associated_files none File name of an associated file. Must be used with associated_file_type. Please include the file suffix in the entry. If multiple entries are applicable, separate them with the pipe character: | To be used with field: associated_file_type If individual files are referenced but are part of a TAR archive bundle, be sure to use the associated_archives and associated_archive_types headers.
associated_file_types none File type of an associated file. Please contact SeaBASS staff before using this field to verify that your file type is supported. Valid entries for this field are: DNA-FASTQ, DNA-FASTA (for files relating to DNA analysis), BENTHIC (for images relating to benthic type and cover), and PLANKTONIC (for images relating to flow cam imagery or phytoplankton taxonomic types). If multiple entries are applicable, separate them with the pipe character: | To be used with field: associated_files
Asta mg/m^3 HPLC Astaxanthin
At degreesC Air temperature
aw 1/m Absorption coefficient of water
b 1/m Total scattering coefficient (bw + bp)
bact_abun cells/L Bacterioplankton abundance
bactP pmol/L/hr    Bacteriplankton production
bb 1/m Total backscattering coefficient (bbw + bbp)
bbp 1/m Backscattering coefficient of particles
bbp_bp unitless Ratio of the backscattering coefficient of particles (bbp) to the total backscattering coefficient (bp)
bbw 1/m Backscattering coefficient of water
BChl_a mg/m^3 HPLC Bacteriochlorophyll a
benthic_type none Description of the benthic seafloor community or substrate.
beta-beta-Car mg/m^3 HPLC Beta-Carotene (Beta,beta-Carotene)
beta-epi-Car mg/m^3 HPLC Alpha-Carotene (Beta,epsilon-Carotene)
beta-psi-Car mg/m^3 HPLC Gamma-Carotene (Beta,psi-Carotene)
bin_depth m Nominal or center depth for each data bin
bin_diameter_center m size bin limit for particle size distribution measurements (e.g. for coulter counter)
bin_diameter_lower m size bin limit for particle size distribution measurements (e.g. for coulter counter)
bin_diameter_upper m size bin limit for particle size distribution measurements (e.g. for coulter counter)
bincount none Number of records averaged into a bin or reported measurement
biotic_setting none Biotic Setting, Biotic Component, level 1 (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
biotic_class none Biotic Class, Biotic Component, level 2 (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
biotic_subclass none Biotic Subclass, Biotic Component, level 3 (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
biotic_group none Biotic Group, Biotic Component, level 4 (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
biotic_community none Biotic Community, Biotic Component, level 5 (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
bottle none Number used to identify a specific bottle within an array of bottle samples collected
bp 1/m Scattering coefficient of particles
BSi mmol/m^3 Biogenic silica
But-fuco mg/m^3 HPLC 19'-Butanoyloxyfucoxanthin
bw 1/m Scattering coefficient of water
c 1/m Beam attenuation coefficient
C2H3N_H ppbv VOCC concentration of (C2H3N)H+ in the air evolved from the experimental chambers that are measured by the PTR-TOF/MS. Use with headers /chemical_formula= and /mass_to_charge=.
C2H4O_H ppbv VOCC concentration of (C2H4O)H+ in the air evolved from the experimental chambers that are measured by the PTR-TOF/MS. Use with headers /chemical_formula= and /mass_to_charge=.
C2H6S_H ppbv VOCC concentration of (C2H6S)H+ in the air evolved from the experimental chambers that are measured by the PTR-TOF/MS. Use with headers /chemical_formula= and /mass_to_charge=.
C3H6O_H ppbv VOCC concentration of (C3H6O)H+ in the air evolved from the experimental chambers that are measured by the PTR-TOF/MS. Use with headers /chemical_formula= and /mass_to_charge=.
C5H8_H ppbv VOCC concentration of (C5H8)H+ in the air evolved from the experimental chambers that are measured by the PTR-TOF/MS. Use with headers /chemical_formula= and /mass_to_charge=.
C6H6_H ppbv VOCC concentration of (C6H6)H+ in the air evolved from the experimental chambers that are measured by the PTR-TOF/MS. Use with headers /chemical_formula= and /mass_to_charge=.
Cantha mg/m^3 HPLC Canthaxanthin
cdmf volts CDOM fluorescence (may be used in combination with suffixes _ex### and/or _em###, like so: cdmf_ex###_em###; ex = excitation wavelength; em = emission wavelength)
cdom mg/m^3 Concentration of chromophoric dissolved organic matter
cg 1/m Attenuation coefficient of Gelbstoff
cgp 1/m Attenuation coefficient of Gelbstoff + particles (c - cw = agp + bp)
CH4O_H ppbv VOCC concentration of (CH4O)H+ in the air evolved from the experimental chambers that are measured by the PTR-TOF/MS. Use with headers /chemical_formula= and /mass_to_charge=.
CH4S_H ppbv VOCC concentrations of (CH4S)H+ in the air evolved from the experimental chambers that are measured by the PTR-TOF/MS. Use with headers /chemical_formula= and /mass_to_charge=.
Chl mg/m^3 Chlorophyll a derived fluorometrically/spectrophotometrically (e.g., "extracted" Chl)
Chl_ex mg/m^3 Chlorophyll a derived via experiment, or experimental methods. See specific documentation for more information.
Chl_stimf mg/m^3   Chlorophyll a derived from a calibrated in situ fluorometer
Chl_a mg/m^3 HPLC Chlorophyll a (MV_Chl_a plus allomers and epimers)
Chl_a_allom mg/m^3 HPLC Chlorophyll a allomers
Chl_a_prime mg/m^3 HPLC Chlorophyll a epimer
Chl_b mg/m^3 HPLC Chlorophyll b
Chl_c mg/m^3 HPLC Chlorophyll c
Chl_c1 mg/m^3 HPLC Chlorophyll c1
Chl_c1c2 mg/m^3 HPLC Chlorophyll c1 + c2 + Mg_DVP
Chl_c2 mg/m^3 HPLC Chlorophyll c2
Chl_c3 mg/m^3 HPLC Chlorophyll c3
Chlide_a mg/m^3 HPLC Chlorophyllide a
Chlide_b mg/m^3 HPLC Chlorophyllide b
chors_id none CHORS HPLC processing identification number
cloud % Percent cloud cover
cnw 1/m Attenuation coefficient of Gelbstoff + particles (obsolete; see cgp)
cond mmho/cm Conductivity
cp 1/m Beam attenuation coefficient of particles (ap + bp)
cp_gamma unitless Particulate beam attenuation spectra's slope
Croco mg/m^3 HPLC Crocoxanthin
cycle none Incrementing counter describing the sampling interval of the instrument. Relevant to the PTR-TOF/MS.
cw 1/m Beam attenuation coefficient of water (aw + bw)
date yyyymmdd Sample date
date_processed yyyymmdd Date the sample was processed
day dd Sample day
depth m Depth of measurement
dewpoint degreesC Dew point temperature
Diadchr mg/m^3 HPLC Diadinochrome
Diadino mg/m^3 HPLC Diadinoxanthin
Diato mg/m^3 HPLC Diatoxanthin
DIC umol/kg Dissolved inorganic carbon
Dino mg/m^3 HPLC Dinoxanthin
DMSA ppt Concentration of dimethyl sulfide (DMS) in the atmosphere
DMSSW nmol/L Concentration of dimethyl sulfide (DMS) in sea water
DNA mg/m^3 DNA (DeoxyriboNucleic Acid) concentration within a water volume
DOC umol/kg Dissolved organic carbon
DP mg/m^3 Total diagnostic pigments (PSC + Allo + Zea + Tot_Chl_b)
DV_Chl_a mg/m^3 HPLC Divinyl Chorophyll a
DV_Chl_b mg/m^3 HPLC Divinyl Chorophyll b
Echin mg/m^3 HPLC Echinenone
Ed uW/cm^2/nm Downwelling irradiance
EdGND volts Dark current values for Ed sensor
elapsed_time seconds Elapsed time
Elw uW/cm^2 Downwelling irradiance over the infrared spectrum, 3 to 40 um
Epar uE/cm^2/s Profiled PAR
epi-epi-Car mg/m^3 HPLC Epsilon-Carotene (Epsilon,epsilon-Carotene)
Es uW/cm^2/nm Downwelling surface irradiance
EsGND volts Dark current values for Es sensor
Esky uW/cm^2/nm Downwelling sky irradiance
Esun uW/cm^2/nm Downwelling sun irradiance (direct normal solar irradiance)
Esw uW/cm^2 Downwelling irradiance over the solar spectrum, 0.3 to 3 um
Et-8-carot mg/m^3 HPLC Ethyl-apo-8'-carotene
Et-chlide_a mg/m^3 HPLC Ethyl Chlorophyllide a
Et-chlide_b mg/m^3 HPLC Ethyl Chlorophyllide b
Eu uW/cm^2/nm Upwelling irradiance
EuGND volts Dark current values for Eu sensor
EuPAR uE/cm^2/s Profiled upwelling PAR
F0 uW/cm^2/nm Extraterrestrial solar irradiance
F-initial unitless Minimum fluorescence in darkness. Fast Repetition Rate Fluorescence measurement, commonly abbreviated as F0
Fm unitless Maximum fluorescence in darkness. Fast Repetition Rate Fluorescence measurement
Fv_Fm unitless Maximum photochemical efficiency. Fast Repetition Rate Fluorescence measurement, commonly abbreviated as Fv/Fm
FL-A arbunits Area of the signal of emission by flourescence (flow cytometry). May be used with _ex###_em### field modifiers.
FL-H arbunits Height of the signal of emission by flourescence (flow cytometry). May be used with _ex###_em### field modifiers.
FSC-A arbunits Area of the signal of light scattered in the forward direction from the laser interrogating particles (flow cytometry).
FSC-H arbunits Height of the signal of light scattered in the forward direction from the laser interrogating particles (flow cytometry).
FSCperp-H arbunits Height of the signal of light that has been depolarized from the original polarization of the laser interrogating particles (flow cytometry).
Fuco mg/m^3 HPLC Fucoxanthin
g d^-1 Grazing Rate
g_herb d^-1 Herbivorous Grazing Rate (i.e., Herbivore Induced Mortality)
geoform_tectonic_setting none Geoform Component Tectonic Subcomponent (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
geoform_physiographic_setting none Geoform Component Physiographic Setting Subcomponent (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
geoform_origin none Geoform origin (CMECS Units, Geoform Subcomponent, entry value should be text that does NOT contain the file's delimiter)
geoform none Geoform (CMECS Units, Geoform Subcomponent, entry value should be text that does NOT contain the file's delimiter)
geoform_type none Geoform type (CMECS Units, Geoform Subcomponent, entry value should be text that does NOT contain the file's delimiter)
Gyro mg/m^3 HPLC Gyroxanthin-Diester
heading degrees platform's heading (e.g., ship's), in degrees
Hex-fuco mg/m^3 HPLC 19'-Hexanoyloxyfucoxanthin
Hex-kfuco mg/m^3 HPLC 19'-Hexanoyloxy-4-ketofucoxanthin
hour hh Sample hour
hpl_id none HPL HPLC processing identification number
hplc_gsfc_id none NASA GSFC HPLC processing idenfication number (i.e. 'GSFC HPLC lab sampler code')
iso_C2H3N_H ppbv VOCC concentration of (13C2H3N)H+ in the air evolved from the experimental chambers that are measured by the PTR-TOF/MS. Use with headers /chemical_formula= and /mass_to_charge=.
iso_C2H4O_H ppbv VOCC concentration of d3-acetaldehyde (C2HD3O)H+ in the air evolved from the experimental chambers that are measured by the PTR-TOF/MS. Use with headers /chemical_formula= and /mass_to_charge=.
iso_C2H6S_H ppbv VOCC concentration of d3-dimethylsulfide (C2D3H3S)H+ in the air evolved from the experimental chambers that are measured by the PTR-TOF/MS. Use with headers /chemical_formula= and /mass_to_charge=.
iso_C3H6O_H ppbv VOCC concentration of d6-acetone (C3D6O)H+ in the air evolved from the experimental chambers that are measured by the PTR-TOF/MS. Use with headers /chemical_formula= and /mass_to_charge=.
iso_CH4O_H ppbv VOCC concentration of (13CH4O)H+ in the air evolved from the experimental chambers that are measured by the PTR-TOF/MS. Use with headers /chemical_formula= and /mass_to_charge=.
It degreesC Instrument temperature
Kd 1/m Diffuse attenuation coefficient of Ed
Kl 1/m Diffuse attenuation coefficient of Lu
Knf 1/m Diffuse attenuation coefficient of natf
Kpar 1/m Diffuse attenuation coefficient of PAR
Ku 1/m Diffuse attenuation coefficient of Eu
lat degrees Sample latitude
lightlevel % Light sample was exposed to, relative to the ambient or experimental intensity
lon degrees Sample longitude
LSi mmol/m^3 Lithogenic silica
Lsky uW/cm^2/nm/sr Sky radiance
Lt uW/cm^2/nm/sr Total water radiance
Lu uW/cm^2/nm/sr Upwelling radiance
LuGND volts Dark current values for Lu sensor
Lut mg/m^3 HPLC Lutein
Lw uW/cm^2/nm/sr Water leaving radiance
Lwn uW/cm^2/nm/sr Normalized water leaving radiance ( Lwn = Lw * F0 / Es )
Lwnex uW/cm^2/nm/sr Exact normalized water leaving radiance ( e.g., Morel et al. 2002 )
Lyco mg/m^3 HPLC Lycopene
Me-chlide_a mg/m^3 HPLC Methyl Chlorophyllide a
Me-chlide_b mg/m^3 HPLC Methyl Chlorophyllide b
Mg_DVP mg/m^3 HPLC Mg 2,4 divinyl pheoporphyrin a5 monomethyl ester
minute mn Sample minute
Monado mg/m^3 HPLC Monadoxanthin
month mo Sample month
mPF none Microplankton proportion factor ([Fuco + Perid] / DP)
MUF umol Concentration of 4-Methylumbelliferone's fluorescent molecules without an associated substrate (used for the calibration curve in flow cytometry).
MUF-But umol/L/hr Rate of substrate cleavage for 4-Methylumbelliferyl butyrate
MUF-Glu umol/L/hr Rate of substrate cleavage for 4-Methylumbelliferyl beta-D-glucopyranoside
MUF-PO4 umol/L/hr Rate of substrate cleavage for 4-Methylumbelliferyl phosphate
MV_Chl_a mg/m^3 HPLC Monovinyl Chorophyll a
MV_Chl_b mg/m^3 HPLC Monovinyl Chorophyll b
mz unitless Mass-to-charge ratio, used to describe proton-transfer-reaction time-of-flight mass spectrometer (PTR-TOF/MS) measurements
N2avg s^-2 The mean squared buoyancy frequency (Brunt–Väisälä frequency) between the surface and measurement depth
N2_fix ug/m^3/d Nitrogen Fixation Rates
nadir degrees Sensor nadir angle (the nadir is the downward facing viewing geometry, opposite the zenith)
nanoeukaryote (see Field Name Suffixes table) Phytoplankton taxonomic label for nanoeukaryote. Use in combination with the supported suffixes in the Field Name Suffixes Table.
natf nE/m^2/sr/s natural fluorescence of chlorophyll a
Neo mg/m^3 HPLC Neoxanthin
NCCb mmol/m^2/hr Net Benthic Community Calcification, expressed as the millimole production of CaCO3 per benthic area per hour
NCPb mmol/m^2/hr Net Benthic Community Productivity, expressed as the millimole production of O2 per benthic area per hour
NH4 mmol/m^3 NH4
NO2 mmol/m^3 Nitrite
NO2_NO3 mmol/m^3 NO2 + NO3
NO3 mmol/m^3 Nitrate
nPF none Nanoplankton proportion factor ([Hex-fuco + But-fuco + Allo] / DP)
NPP mg/m^3/d Net Primary Productivity
nrb photoelectrons/usec/shot Normalized relative backscatter
oxygen ml/L Dissolved oxygen
oxygen_saturation % Percent oxygen saturation
Oz dobson Column Ozone
P-457 mg/m^3 HPLC P-457
PAR uE/cm^2/s PAR measured at the sea surface
PC mg/m^3 Phycocyanin derived fluorometrically/spectrophotometrically
pCO2 uatm Surface water partial pressure of carbon dioxide
Perid mg/m^3 HPLC Peridinin
pDrift mbar Pressure in the drift tube of the PTR-TOF/MS.
pH none pH
PHAEO mg/m^3 Total phaeopigment concentration
Phide_a mg/m^3 HPLC Pheophorbide a
Phide_b mg/m^3 HPLC Pheophorbide b
Phide_c mg/m^3 HPLC Pheophorbide c
Phytin_a mg/m^3 HPLC Pheophytin a
Phytin_b mg/m^3 HPLC Pheophytin b
Phytin_c mg/m^3 HPLC Pheophytin c
Phytyl-chl_c mg/m^3 HPLC Phytylated Chlorophyll c
phyto_carbon ug/L Phytoplankton carbon concentration
PIC mol/m^3 Particulate inorganic carbon
PIM mg/L Suspended particulate inorganic matter
picoeukaryote (see Field Name Suffixes table) Phytoplankton taxonomic label for picoeukaryote. Use in combination with the supported Field Name Suffixes Table.
pitch degrees Instrument pitch
PN mg/m^3 Particulate nitrogen
PO4 mmol/m^3 Phosphate
POC mg/m^3 Particulate organic carbon
POH mg/m^3 Particulate organic hydrogen
POM mg/L Suspended particulate organic matter
PON mg/m^3 Particulate organic nitrogen
PP mgC/mgchla/hr Primary productivity
PPC mg/m^3 Photoprotective carotenoids (Allo + Diadino + Diato + Zeo + alpha-beta-Car)
PPC_Tcar none Ratio of PPC to Tcar
PPC_Tpg none Ratio of PPC to Tpg
pPF none Picoplankton proportion factor ([Zea + Tot_chl_b] / DP)
Pras mg/m^3 HPLC Prasinoxanthin
pressure dbar Water pressure
pressure_atm mbar Atmospheric pressure
prochlorococcus (see Field Name Suffixes table) Phytoplankton taxonomic label for prochlorococcus. Use in combination with the supported Field Name Suffixes listed in the above table, relating to taxonomic types.
PSC mg/m^3 Photosynthetic carotenoids (But-fuco + Fuco + Hex-fuco + Perid)
PSC_Tcar none Ratio of PSC to Tcar
PSD uL/L Particle Size Distribution. Must be used in conjunction with a suffix to specify sizes, e.g., PSD_80.5size (see _###size in table of field name modifiers.)
PSP mg/m^3 Photosynthetic pigments (PSC + Tchl)
PSP_Tpg none Ratio of PSP to Tpg
pulse_width seconds Time duration that the primary trigger channel exceeded the width measurement threshold during an event (flow cytometry). Scientific notation is accepted.
pvel m/s Profiler velocity
Pyrophide_a mg/m^3 HPLC Pyropheophorbide a
Pyrophytin_a mg/m^3 HPLC Pyropheophytin a
Pyrophytin_b mg/m^3 HPLC Pyropheophytin b
Pyrophytin_c mg/m^3 HPLC Pyropheophytin c
Q sr Eu / Lu (equal to pi in diffuse water)
quality none Analyst-specific data quality flag
R unitless Irradiance reflectance (Eu / Ed)
Rb unitless Benthic irradiance reflectance (Lambertian equivalence reflectance)
RelAbundance % Percent cell abundance of a specific phytoplankton taxonomic type relative to all observed cells.
RelAz degrees Sensor azimuth angle relative to the solar plane
Rf uW/cm^2/nm/sr Raman fluorescence (may be used in combination with suffixes _ex### and/or _em###, like so: Rf_ex###_em###; ex = excitation wavelength; em = emission wavelength)
Rl 1/sr Radiance reflectance (Lu / Ed)
roll degrees Instrument roll
Rpi unitless Radiance reflectance with pi (pi * Lu / Ed)
Rrs 1/sr Remote sensing reflectance (Lw / Ed)
S_ad none Slope of non-algal detritus absorption spectra
S_ag none Slope of gelbstoff absorption spectra
sal PSU Salinity
sample none Sample number
SAZ degrees Solar azimuth angle
sdy ddd Sequential day of year
second ss Sample second
SenZ degrees Sensor zenith angle
sig mV Stregth of the raw signal of the sunphotometer
sigma_PSII angstrom^2 Effective absorption cross-section of photosystem II in darkness
sigma_theta kg/m^3 Potential density - 1000 kg/m3
sigmaT kg/m^3 Density - 1000 kg/m3
SiO4 mmol/m^3 Silicic Acid / "Dissolved Silica"
Siphn mg/m^3 HPLC Siphonein
Siphx mg/m^3 HPLC Siphonaxanthin
SN none Instrument serial number
speed_f_w m/s Speed in the forward direction, relative to water
SPM mg/L Total suspended particulate matter
SSC-A arbunits Area of the signal of light side scattered from the laser interrogating particles (flow cytometry).
SSC-H arbunits Height of the signal of light side scattered from the laser interrogating particles (flow cytometry).
SST degreesC Sea surface temperature
station none Sample station
station_alt_id none Alternate sample station identifier (use ONLY if station has already been used as a field name)
stimf volts Stimulated fluorescence, nominally of chlorophyll a. The suffixes _ex### and _em### may be used to specify wavelengths like so: stimf_ex###_em###; ex = excitation wavelength; em = emission wavelength). Related field: Chl_stimf
substrate_origin none Substrate origin, Substrate Component level 1 (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
substrate_class none Substrate class, Substrate Component level 2 (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
substrate_subclass none Substrate subclass, Substrate Component level 3 (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
substrate_group none Substrate group, Substrate Component level 4 (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
substrate_subgroup none Substrate subgroup, Substrate Component level 5 (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
synechococcus (see Field Name Suffixes table) Phytoplankton taxonomic label for synechococcus. Use in combination with the supported Field Name Suffixes listed in the above table, relating to taxonomic types.
SZ m Secchi disk depth
SZA degrees Solar zenith angle
Tacc mg/m^3 Total accessory pigments (PPC + PSC + Tot_Chl_b + Tot_Chl_c)
Tacc_Tchla none Ratio of Tacc to Tot_Chl_a
TauAv ns Flourescence kinetics decay time (i.e., fluorescence lifetime of the excited photosynthetic unit)
Tcar mg/m^3 Total carotenoids (PPC + PSC)
Tchl mg/m^3 Tot_Chl_a + Tot_Chl_b + Tot_Chl_c
TChl_Tcar none Ratio of Tchl to Tcar
Tchla_Tpg none Ratio of Tot_chl_a to Tpg
TDN mmol/m^3 Total dissolved nitrogen
Tdrift degreesC Temperature in the drift tube of the PTR-TOF/MS.
tilt degrees Instrument tilt
time hh:mm:ss Sample time
time_processed hh:mm:ss Time the sample was processed
Tot_Chl_a mg/m^3 HPLC DV_Chl_a + MV_Chl_a + Chlide_a + Chl_a_allom + Chl_a_prime
Tot_Chl_b mg/m^3 HPLC DV_Chl_b + MV_Chl_b
Tot_Chl_c mg/m^3 HPLC chl_c1 + chl_c2 (i.e., chl_c1c2) + chl_c3
Tpg mg/m^3 Total pigment concentration
trans % Percent transmission
turbidity NTU Turbidity
u d^-1 Growth rate (i.e., µ or mu)
u_ph d^-1 Growth rate of phytoplankton
u_zoo d^-1 Growth rate of zooplankton
Urea mmol/m^3 Urea
Vauch mg/m^3 HPLC Vaucheriaxanthin-ester
VelEast m/s ADP Velocity East
VelNorth m/s ADP Velocity North
VelUp m/s ADP Velocity Up
Viola mg/m^3 HPLC Violaxanthin
volfilt L Volume filtered
VOCair ppbv Concenctration of Volatile Organic Carbon (VOC) compounds in air measured via a proton-transfer-reaction time-of-flight mass spectrometer (PTR-TOF/MS)
VSF 1/m/sr Total volume scattering function (VSF### or VSF###_YYYang, where YYY is collection angle). Also called beta.
VSFg 1/m/sr Gelbstoff volume scattering function, i.e., VSFg = VSFw - VSF(pure water, salinity, and temperature) (VSFg### or VSFp###_YYYang, where YYY is collection angle). Also called beta.
VSFp 1/m/sr Particulate volume scattering function i.e., VSFp = VSF - VSFw (VSFp### or VSFp###_YYYang, where YYY is collection angle). Also called beta.
VSFw 1/m/sr Filtered seawater volume scattering function plus VSF sal & temp contributions, i.e., VSFw = VSF - VSFp (VSFw### or VSFw###_YYYang, where YYY is collection angle). Also called beta.
water_column_biogeochemical_feature none Water Column Biogeochemical Feature Subcomponent (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
water_column_hydroform_class none Water Column Hydroform Subcomponent level 1 (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
water_column_hydroform none Water Column Hydroform Subcomponent level 2 (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
water_column_hydroform_type none Water Column Hydroform Subcomponent level 3 (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
water_column_layer none Water Column Layer Subcomponent (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
water_column_salinity none Water Column Salinity Subcomponent (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
water_column_temperature none Water Column Temperature Subcomponent (CMECS Units, entry value should be text that does NOT contain the file's delimiter)
water_depth m The water (bottom) depth where the data were collected
waveht m Wave height
wavelength nm Wavelength of measurement
wdir degrees Wind direction, described in degrees from north, increasing clockwise
wind m/s Wind speed
Wt degreesC Water temperature
Wvp cm Water vapor
year yyyy Sample year
Z_90 m Depth of the first optical layer (37% light level)
Z_DCM m Depth of the deep chlorophyll maximum
Z_Eu m Depth of the euphotic layer
Z_MLD m Depth of the mixed layer
Zea mg/m^3 HPLC Zeaxanthin

The HPLC field names are based on the SCOR (WG 78) abbreviations for each pigment as listed in:

S.W. Jeffrey, R.F.C. Mantoura, and S.W. Wright, Phytoplankton Pigments in Oceanography: Guidelines to Modern Methods, UNESCO Publishing, Paris, France, pp. 661 (1997).

The HPLC sums and ratios are described in Tables 4, 5, and 7 of:

S.B. Hooker and 15 co-authors, The Second SeaWiFS HPLC Analysis Round-Robin Experiment (SeaHARRE-2) , NASA Tech. Memo. 2005-212785, NASA Goddard Space Flight Center, Greenbelt, Maryland, pp. 112 (2005).

Table of Field Name Suffixes

Usage note: Field name suffixes should be appended to the end of a field name, after any field name modifiers (such as wavelength, excitation, etc). Field name suffixes require the presence of the un-suffixed field name as a separate field entry within the same SeaBASS file (i.e., FCHECK will complain if your file contains chl_sd but not chl).

Field Suffix Units Description
_abun cell/L cell abundance for a particular (phytoplankton) taxonomic type
_biovol m^3/L bio-volume for a particular (phytoplankton) taxonomic type
_carbon ug/L

carbon concentration for a particular (phytoplankton) taxonomic type

_bincount none Number of records averaged into a bin or reported measurement specific to the prefix that _bincount is attached to. The field "bincount" can simply be used if the bincount applies to all forms of data in the file, but this field suffix (i.e., "<field>_bincount") can be used multiple times in the same file for field-specific numbers.
_cv none Coefficient of Variation. Append "_cv" to the end of the field name it describes e.g., bb532_cv
_sd same as base field's units Standard Deviation. Append "_sd" to the end of the field name it describes e.g., chl_sd
_se same as base field's units Standard Error. Append "_se" to the end of the field name it describes, e.g., chl_se

Table of Field Name Modifiers

The following table provides special ways to modify field names, generally for specific cases where it is necessary to index on a second wavelength or to indicate special size filters.  These modifiers go after the base name (and wavelength, if applicable) but before any suffix.

Field Modifiers Units Description
_###ang does not change base field's units Collection angle. Append "_###ang" to the end of a field name to indicate the collection angle a measurment (such as VSF) was taken at, where "###" would be replaced by the float or integer representation of an angle in degrees. (For example, if volume scattering function is measured at a collection angle of 124 degrees, the field name would be "vsf_124ang".)
_##cilo does not change base field's units Confidence interval, lower, where ## is to be replaced with the percent the confidence interval was computed for. Append "_##cilo" to the end of the field name it describes to indicate the relative confidence interval at a given percentage, e.g., chl_95cilo
_##ciup does not change base field's units Confidence interval, upper, where ## is to be replaced with the percent the confidence interval was computed for. Append "_##ciup" to the end of the field name it describes to indicate the relative confidence interval at a given percentage, e.g., chl_95ciup
_ex### does not change base field's units Excitation wavelength. Append "_ex###" to the end of a field name to indicate the wavelength of excitation the measurement was taken at, where "###" would be replaced by the float or integer represenation of wavelength in nm. May be used in combination with "_em###", as such: "cdmf_ex###_em###", where "_ex###" preceeds "_em###".
_em### does not change base field's units Emission wavelength. Append "_em###" to the end of a field name to indicate the wavelength of emission the measurement was taken at, where "###" would be replaced by the float or integer represenation of wavelength in nm. May be used in combination with "_ex###", as such: "cdmf_ex###_em###", where "_ex###" preceeds "_em###".
_###filt does not change base field's units Filter size used for screening samples. Append "_###filt" to the end of a field name to indicate the size of the filter in base units of micrometers (um) the measurement was filtered through. By default, most SeaBASS measurements are assumed to be unfiltered/unmodified, use this field modifier to indicate otherwise.
_###ppt does not change base field's units Parts per thousand. Append "_###ppt" to the end of a field name to indicate the solution's concentration that a measurement was taken in, where "###" would be replaced by the concentration as a floating point number or integer. (For example, if absorbance is measured at 435.2 nm in a 35.3 ppt sodium-chloride solution, the field name would be "abs_nacl435.2_35.3ppt".)
_###size does not change base field's units Median bin diameter in microns. Used as a suffix for the field "PSD".
_stokes1 does not change base field's units First Stokes parameter for characterizing polarization.
_stokes2 does not change base field's units Second Stokes parameter for characterizing polarization.
_stokes3 does not change base field's units Third Stokes parameter for characterizing polarization.
_stokes4 does not change base field's units Fourth Stokes parameter for characterizing polarization.
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Last edited by Joel Scott on 2018-09-20
Created by Chris Proctor on 2012-09-07