Australian Western Equatorial JGOFS Data: Oceanographic profile temperature, salinity, nutrients, and other measurements collected using bottle and high resolution CTD from the FRANKLIN in the Equatorial Pacific, South Pacific, and other locations from 1990 to 1993 (NCEI Accession 0000569)

The OZGOFS research project was a multidisciplinary project comprising 3 research cruises on the R.V. Franklin in October 1990, July 1992 and November 1993.  The area of operations was between 2ÂºS and 6ÂºN along 147ÂºE and between 10ÂºS and 10ÂºN along 155ÂºE.

The ADCP data is presented in 8 meter bins at 20 minute averages along the major transects. CTD data for each cruise is presented as individual stations.  The first 12 lines in each profile are header information: ship, date, start time, bottom time, finish time (UTC), cruise number, start position, bottom position, and finish position (as dd mm.ss), maximum depth and ocean depth.

The CTD data, plus density (as sigma-t), fluorescence and PAR is presented in 2 meter bins.  Where no information is presented under a header (e.g. PAR, fluorescence) the sensor was not present on the CTD during the cast.  Fluorescence profiles from a SeaTech fluorometer mounted on the CTD converted to chlorophyll-a profiles using a regression of fluorescence burst data (taken when a niskin bottle is closed) and the extracted chlorophyll sample at that depth.  The fluorescence profiles were calibrated using chlorophyll-a evaluated using the trichromatic equations for FR 9008, but HPLC chlorophyll-a on FR 9205. The regressions are given in the metafiles. Where possible, the extracted chlorophyll-a data have been depth-matched and included on the data files.

The parameters sampled from niskin bottles (salinity, nutrients, chlorophyll and pigments, bacteria and cyanobacteria, lipids, nutrients, primary production) use the same template, derived from the hydrochemistry sampling sheets, but are in separate directories. The general form is for each station to be listed, along with a counter, time and date of sampling, station position, niskin number and position on the rosette (when supplied), and then the data.

Radionuclide data was taken at one site on FR 9205, and three on FR 9308, and consisted of measurements of dissolved and particulate 226Ra, 210Pb, and 210Po.

Underway data are found in the Surface CO2 directories. Surface pCO2 data measured using an equilibrator are from FR 9205 only, and contain date, time, position, surface temperature and salinity, atmospheric pressure and fCO2 data.  There are estimates of pCO2 from pH studies in surface waters from FR 9008, FR 9205, and FR 9308.  These files contain Files in the Underway Data directory contain date, time, position, surface temperature, salinity, fluorescence (in uncalibrated Turner units), pH and pCO2 data.

The free-floating sediment trap data, from FR 9308 only, consists of HPLC pigments and pigment flux estimates, and flux estimates for dry weight, carbonate, organic matter, and total carbon, nitrogen and phosphorus fluxes.

Zooplankton was sampled on FR 9205 and FR 9308 using a 200 micron mesh aperture free-fall plankton net. Settled volumes and dominant taxa only were recorded.

Tags: oceanography
Organization: National Oceanic and Atmospheric Administration, Department of Commerce