“Happy Holidays! BCO-DMO will be on break from 23 December to 2 January 2025. Submissions and questions will still be accepted, however our responses may be delayed during this time.”

Parameter: Alpha

Dataset: 
Response of Ulva to OA and NH4+
Parameter: 
alpha
Master parameters information
Short Name:
 alpha
Short Description:
 alpha
Official Name:
 alpha
No Data Value:
 nd
Description:
 

light limited photosynthesis, calculated from curve, used in conjunction with irradiance measurements, a Southern Ocean Globec term, (mgC/chla/h)/(uE/m2/s)

Dataset-parameters information
Supplied Name: 
Alpha
Supplied Units: 
unitless
Datatype: 
Float
Conversion Necessary: 
no
No Data Value: 
nd
Description: 

Alpha = photosynthetic efficiency. 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.