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Parameter: chl_cal

Dataset: 
Profile data
Parameter: 
chlorophyll a
Master parameters information
Short Name:
 chl_a
Short Description:
 chlorophyll a
Official Name:
 chlorophyll a
No Data Value:
Description:
 

Total chlorophyll a pigment. See dataset for units of measurement; often reported in: milligrams per cubic meter (mg/m3); micrograms/liter (ug/L); nanograms/liter (ng/L).

CAUTION Within JGOFS MERGED water column products: this parameter is derived from HPLC methodology and the units are nanograms/liter; however; this parameter name is also used for a variety of water and nonwater column sampling; derived via the fluorometric method; units will also vary.

Dataset-parameters information
Supplied Name: 
chl_cal
Supplied Units: 
ug/L
Conversion Necessary: 
no
No Data Value: 
nd
Description: 

Calibrated chlorophyll-a; Corrected fluorometric chlorophyll-a concentrations (chl_corr derived above) were calibrated to chlorophyll-a concentrations measured by HPLC of bottle samples collected during concurrent Bermuda Atlantic Time-series Study cruises (available at http://www.bco-dmo.org/project/2124 or http://bats.bios.edu).

Linear regression yields the relationship:

chl_cal [u=ug/L] = chl [ug/L] * 0.4756 + 0.0064; R2 = 0.92.

See https://www.bco-dmo.org/dataset/728371 for bottle calibration data.