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Parameter: Ik

Dataset: 
Response of Ulva to OA and NH4+
Parameter: 
light intensity at Pmax
Master parameters information
Short Name:
 Ik
Short Description:
 light intensity at Pmax
Official Name:
 Ik
No Data Value:
Description:
 

light intensity where Pmax is reached, used in conjunction with irradiance measurements, a Southern Ocean Globec term, (uE/M2/s), see parameter Pmax

Dataset-parameters information
Supplied Name: 
Ik
Supplied Units: 
micromoles photons per square meter per second (uM photon m-2 s-1)
Datatype: 
Float
Conversion Necessary: 
no
No Data Value: 
nd
Description: 

lk = light saturation point. A photosynthesis-irradiance (P-I) curve was generated using various photon flux densities from 0 - 700 uM photons m-2 s-1 for 200 seconds each, following a 200 second dark period to measure dark respiration rate. The maximum photosynthetic rate (Pmax), light saturation point (Ik), and photosynthetic efficiency (the initial slope of the P-I curve) (alpha) were determined from the P-I curves.