This record describes PSA (Particle Size Analysis) data collected as part of the 1991-1993 Tasmanian Slope Trophodynamics Study undertaken by CSIRO Division of Fisheries. PSA data were obtained from Niskin bottle samples at a range of depths (surface to 1500 meters) on 4 cruises of FRV "Southern Surveyor" on three 60 km transects across the continental shelf to the south and south-east of Tasmania in July 1991 (cruise SS 02/91), February 1992 (cruise SS 01/92), November 1992 (cruise SS 04/92) and April 1993 (cruise SS 03/93). Analyses were later used to also derive approximate measurements of particulate carbon in the water column.

This record describes Photosynthetically Available Radiation (PAR) data collected as part of the 1991-1993 Tasmanian Slope Trophodynamics Study undertaken by CSIRO Division of Fisheries. PAR data were obtained from an irradiance sensor lowered through the water shortly after completing a CTD cast from which chlorophyll and productivity samples were taken, at a range of depths (surface to 1500 meters) on 4 cruises of FRV "Southern Surveyor" on three 60 km transects across the continental shelf to the south and south-east of Tasmania in July 1991 (cruise SS 02/91), February 1992 (cruise SS 01/92), November 1992 (cruise SS 04/92) and April 1993 (cruise SS 03/93).

This record describes the dissolved oxygen data collected as part of the 1991-1993 Tasmanian Slope Trophodynamics Study undertaken by CSIRO Division of Fisheries. Samples for Dissolved Oxygen were taken from Niskin bottle samples at a range of depths (surface to 1500 meters) on 4 cruises of FRV "Southern Surveyor" on three 60 km transects across the continental shelf to the south and south-east of Tasmania in July 1991 (cruise SS 02/91), February 1992 (cruise SS 01/92), November 1992 (cruise SS 04/92) and April 1993 (cruise SS 03/93).

This record describes fluorescence data collected as part of the 1991-1993 Tasmanian Slope Trophodynamics Study undertaken by CSIRO Division of Fisheries. The data were obtained from an SeaTech fluorometer lowered through the water shortly after completing a CTD cast from which chlorophyll and productivity samples were taken, at a range of depths (surface to 1500 meters) on 4 cruises of FRV "Southern Surveyor" on three 60 km transects across the continental shelf to the south and south-east of Tasmania in July 1991 (cruise SS 02/91), February 1992 (cruise SS 01/92), November 1992 (cruise SS 04/92) and April 1993 (cruise SS 03/93).

This record describes chlorophyll data collected as part of the 1991-1993 Tasmanian Slope Trophodynamics Study undertaken by CSIRO Division of Fisheries. Chlorophyll data were obtained from analyses of filters from Niskin bottle samples at a range of depths (surface to 1500 meters) on 4 cruises of FRV "Southern Surveyor" on three 60 km transects across the continental shelf to the south and south-east of Tasmania in July 1991 (cruise SS 02/91), February 1992 (cruise SS 01/92), November 1992 (cruise SS 04/92) and April 1993 (cruise SS 03/93). Analyses were carried out using spectrophotometric methods (cruise SS 01/92) and HPLC (3 remaining cruises), and analysed for chlorophylls a, b and c to give estimates of algal biomass in the water.

Composite sea surface temperature (SST) images derived from NOAA AVHRR satellite data received in Hobart, covering Tasmania and surrounding region, for comparison with, and extrapolation of, actual measurements recorded during four voyages of FRV "Southern Surveyor" over the period July 1991-April 1993 for the Tasmanian Slope Trophodynamics project. The SST images are averaged by month over a slightly longer period (January 1991-December 1993). There are also 4 higher resolution images corresponding to the times of the actual voyages, taken on 13 July 1991, 20-22 Feb 1992, 6-7 Nov 1992 and 20-26 Apr 1993. The images are composites from an original dataset of c3000 images over this period, held in the Remote Sensing Facility in Hobart.

This record describes the nutrient data collected as part of the 1991-1993 Tasmanian Slope Trophodynamics Study undertaken by CSIRO Division of Fisheries. Nutrient samples, including measurements of nitrate (NO3), nitrite (NO2), ammonia (NH4), dissolved organic nitrogen (DON), total dissolved nitrogen (TDN), total nitrogen (TN), total particulate nitrogen (TPN), phosphate (PO4), dissolved organic phosphorus (DOP), total dissolved phosphorus (TDP), total phosphorus (TP) and total particulate phosphorus (TPP), were taken from Niskin bottle samples at a range of depths (surface to 1500 meters) on 4 cruises of FRV "Southern Surveyor" on three 60 km transects across the continental shelf to the south and south-east of Tasmania in July 1991 (cruise SS 02/91), February 1992 (cruise SS 01/92), November 1992 (cruise SS 04/92) and April 1993 (cruise SS 03/93).

This record describes the primary productivity data collected as part of the 1991-1993 Tasmanian Slope Trophodynamics Study undertaken by CSIRO Division of Fisheries. Primary productivity measurements were taken on 4 cruises of FRV "Southern Surveyor" on three 60 km transects across the continental shelf to the south and south-east of Tasmania in July 1991 (cruise SS 02/91), February 1992 (cruise SS 01/92), November 1992 (cruise SS 04/92) and April 1993 (cruise SS 03/93). There were typically 5-6 primary productivity stations per transect per cruise. At each station, water samples were collected in Niskin bottles from 3 depths and primary productivity was determined using 14C incubation experiments at a range of 4 light intensities. An additional, mmore intensive experiment was conducted over a 24 hour period at one site using samples from 6 depths incubated at seven light intensities. From these data, P vs I (photosynthesis versus irradiance) parameters were calculated, in particular alpha (the slope of the P vs I curve) and P-max, the light-saturated rate of carbon fixation. These values were then used to model primary production in the water column on a diel, seasonal, and spatially varying basis.