Under ice photosynthesis data collected during the SIPEX II voyage of the Aurora Australis, 2012

Data were obtained from vertical profiles of a Fast Repetition Rate Fluorometer (FRRF, Chelsea FASTocean). The full set of parameters available are reported here. FRRF data have been integrated with on board ship data to add location, time. Parameters:

Ship parameters Cruise Station Type Date Time Longitude Latitude Bottom depth Depth (of FRRF)

FRRF parameters

PMTeht (photomultipier) ADC PAR F light F0 Fm light Fm Fv light Fv Fq FvFm Sigma Sigma light NPQ RCII conc Jpsii JVpsii Alhii Chl conc

For a table defining these units see Oxborough, K. Moore, C.M., Suggett, D.J., Lawson, T., Chan, H.G. and Geider, R.G. Direct estimation of functional PSII reaction centre concentration and PSII electron flux on a volume basis: a new approach to the analysis of Fast Repetition Rate fluorometry (FRRf) data. Liminology and Oceanography: Methods - 2012, 10:142-154. https://aslopubs.onlinelibrary.wiley.com/doi/abs/10.4319/lom.2012.10.142)