Parameter: Fm_D3

Master parameters information
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Fluorescence. Indirect measure of pigment concentration.

Units and collection method may vary. Units often reported in milligrams/meter^3 (mg/m3) or micromoles per liter (ug/L). Sometimes reported after being calibrated against extracted pigment concentrations.

In JGOFS/GLOBEC projects fluorescence is measured from CTD instrument sensor.

Dataset-parameters information
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RFU (Relative Fluorscence Units)
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The third and final measurement of the maximum fluorescence after another 26 seconds into the dark or recovery phase (D3 indicates the third and final measurement in the "dark" phase