prprodpi 93mar 25mar93-15may93 Primary Production based upon Photosynthesis-Irradiance relationships. Includes raw numbers in order to calculate the relationship. Look at fitted_parameters files for derived variables. Date, Station, Depth (meters), DPM's, PAR Irradiance LTER_Grid,Station_Num,Event_Num,Date,Julian_Day,Latitude(S),Longi tude(W),Depth,Bottle,Down_Cast,Up_Cast,Pstron,Chl_a,Time_in,Time_o ut,Inc_time,In_situ_temp,Inc_temp:,Inc_vol,C14_vol_injected,Rt_Vial _Num,Rt_vol,Rt ,Tzero_vial_num,Tzero,Inc_Vial_Num,numpoints,Model_num,Pmax,Al pha,Beta,Ik,It,YIntcpt,Pmax_Err,Alpha_Err,Beta_Err,Ik_Err,It_Err,YInt cpt_Err,Comments,Comments Usually 1 depth profile per station. To determine photosynthesis-irradiance (P-I) relationships, twenty- five 1 ml whole water samples for each discrete field sample were inoculated with H14CO3 (final concentration 3-6 mCi/ml) and placed in newly designed photosynthetrons. The photosynthetrons consisted of a milled aluminum block holding fifty 7 ml scintillation vials. Each block had hollowed out channels which circulate an ethylene glycol:water (1:1) solution for temperature control (+/- 0.05oC). The light source was two 75 watt FOS-8 Cool-Lux Inc. lamps (one lamp for each set of 25 samples). In order to eliminate the spectral bias of carbon uptake in white light, light was passed through a CuSo4 filter to eliminate far-red wavelengths of light. Neutral density Plexiglas filters were used to produce a variety of light intensities ranging from 0 to 1300 uEm-2s-1. After a 1.5 hour incubation at in situ temperatures , samples were fixed with 20 uL formalin solution, acidified with glacial acetic acid:methanol (1:30), and heat dried. National Diagnostics Liquiscint scintillation fluor was added and samples were counted on a LKB 1217 scintillation counter. Shipboard stations taken at pre-defined ship locations. southern ocean, lter, marginal ice zone, primary productivity, phytoplankton, carbon uptake, photosynthesis, palmer peninsula Tab-delimited ASCII. on-line LTER ~lter/lterdata/93mar/productivity/data_files/*.* Barbara B. Prezelin Allen Matlick Barbara B. Prezelin Allen Matlick Allen Matlick Allen Matlick Allen Matlick Allen Matlick Mark Moline, Allen Matlick 6/19/92 20aug94 - Moline Allen Matlick