Revision Date: 15 NOVEMBER, 1994 The data in this directory were binned (averages) to 1 m depth increments. There are 41 fields per data record separated by white space. The naming convention for the files is 'pYYMMDDa.dec', where YY=year, MM=month, and DD=day. The fields (followed by their number in ) are as follows: depth<1> [8725]Ed410<2> [8725]Ed441<3> [8725]Ed488<4> [8725]Ed520<5> [8725]Ed565<6> [8725]Ed665<7> [8726]EdPAR<8> [8725]Lu410<9> [8725]Lu441<10> [8725]Lu488<11> [8725]Lu520<12> [8725]Lu565<13> [8725]Lu655<14> [8725]LuChl<15> [8725]Trans<16> [8725]Fluor<17> [8725]Depth<18> [8725]ExpGd<19> [8725]PCBTp<20> [8725]Volts<21> [8725]Angl1<22> [8725]Angl2<23> [8725]Temp<24> [8725]Cond<25> [8725]Salin<26> [8725]SgmaT<27> [8725]EdPAR<28> Time<29> [8726]410Ed<30> [8726]441Ed<31> [8726]488Ed<32> [8726]520Ed<33> [8726]565Ed<34> [8726]665Ed<35> [8726]Grnd<36> [8726]PAREd<37> [8726]STemp<38> [8726]Power<39> [8725]EdPAR<40> Time<41> [8725] and [8726] are the unit codes, the underwater and the deck units, respectively. The units are standard, micro-watts cm^-2 for the irradiance sensors, photons cm^-2 s^-1 for the PAR channels, and voltages for the transmissometer and fluorometer. The depth record at field #18 will be incorrect (a residue of the averaging routine). Field #8 is surface PAR, and #40 is underwater PAR. Here are a couple of sample records: 4 9.060187e+01 1.020643e+02 1.102129e+02 9.653486e+01 9.073955e+01 3.196451e+01 6.039180e+16 2.647073e+00 2.323089e+00 1.516910e+00 5.016726e-01 2.481264e-01 1.214422e-02 4.379048e+01 1.071000e-01 2.187320e-02 3.957064e+00 1.322300e-04 3.414304e+01 6.214048e+01 -5.448663e+00 6.109355e+00 2.331048e+01 5.125837e+01 3.496046e+01 2.383434e+01 6.184718e+16 9.703572e+00 1.064142e+02 1.201863e+02 1.347642e+02 1.259661e+02 1.277511e+02 1.203360e+02 1.133171e-03 1.125878e+17 2.740483e+01 2.695339e+01 7.286919e+14 9.703572e+00 5 9.444743e+01 1.044328e+02 1.146247e+02 9.685599e+01 8.650160e+01 2.000878e+01 5.029920e+16 2.588708e+00 2.267796e+00 1.476741e+00 4.777676e-01 2.299122e-01 8.321460e-03 2.810588e+01 1.071000e-01 2.395524e-02 5.140094e+00 1.732722e-04 3.397476e+01 6.201418e+01 -4.767780e+00 5.360820e+00 2.330193e+01 5.122296e+01 3.493977e+01 2.382117e+01 5.843857e+16 1.335000e+01 1.071320e+02 1.211565e+02 1.358601e+02 1.270054e+02 1.287600e+02 1.213013e+02 1.130583e-03 1.133332e+17 2.738881e+01 2.695766e+01 7.345332e+14 1.335000e+01 Although these numbers are recorded on the computer to 6-digit resolution, we regard only the first three to the right of the decimal point to be significant. If you wish the complete downcasts (*.csv files, about 1 MB each), contact me [or Carol] at marra[knudson]@lamont.ldgo.columbia.edu (phone requests will not be honored), and I will place the files on-line for a designated time. Upcasts will be added later. b. Pigment data Chlorophyll data are available at two depths (surface and fluorescence maximum) for each cast. They are in the file: chla . Samples have been sent out for HPLC analysis of all pigments. These are not processed as yet, however, they are being maintained under liquid nitrogen, and thus should be well-preserved. c. Phytoplankton absorption data The absorption by phytoplankton collected on GFF filters between 400 and 700 nm (5 nm intervals) are in the files: appl_1 and appl_2 . The procedure followed that in Mitchell and Kiefer (1988) and Cleveland (1993). Wavelength (wl) is column 1 and the samples are in the remainder. The format for this first line is 'mdd[s or ??]appl' where '??' is the depth and 's' indicates a surface value. These samples were collected at the same depths as the chlorophyll a analyses. We are still QC-ing these data, so there will be updates of various kinds in the near future. 3. Other Information I have plotted the data using the system of programs GMT2.1. This shareware program was developed at LDEO and UH. If you are interested in it, see Wessel and Smith (1991), EOS 72, 441, 445-446. The station log for p19c is in the file: stalog . The column titles are listed. 4. References Cleveland, J.S. 1993. Quantifying absorption by aquatic particles: A multiple scattering correction for glass fiber filters. Limnol. Oceanogr. 38, 1321-1327. Marra, J., T.D. Dickey and J.L. Mueller. Global Surveys of Bio-Optical Ocean Properties. EOS 72, 577 and 581. Marra, J. (Ed) 1992.'Report of the JGOFS Task Team on Optics' JGOFS. (Available from the U.S. JGOFS Project Office, WHOI.) Mitchell, B.G. and D.A. Kiefer. 1988. Chorophyll absorption and fluorescence excitation spectra for light-limited phytoplankton. Deep-Sea Res. 35, 855-879.