This dataset describes data collected from the Huon Estuary (Tasmania). Data was collected over a three day period approximately every three months from March 1996 until August 1998. 10 surveys were completed (HES1 to HES10). Data was collected from 61 sites, ranging from 0 salinity at Judbury to a salinity of 35 at the seaward end of the estuary near Huon Island. 5 sites were located near fish farms (refer to the separate metadata record for weekly data at these sites). At these sites, data was collected for all parameters (CTD, salinity, dissolved oxygen, nutrients, pigments, spectral absorbance and phytoplankton) measured. At a further 31 sites spread over the estuary, data was collected for the physical and chemical parameters only. At the remaining 25 sites, only physical (CTD) data was collected. Below Port Huon, samples were collected at three depths - surface, fluorescence maximum and from within the salt wedge. Above Port Huon, samples were collected from the surface and from the salt wedge (where present). This dataset forms part of the CSIRO Marine Research Huon Estuary study, conducted over the period 1996-1998.

This dataset contains data collected from 24/2/97 to 24/8/98 in the Lower Reaches of the Huon Estuary, Tasmania. One day surveys were carried out on five occassions on the day preceding HES4, HES5, HES6, HES9 and HES10 (see Huon Estuary Study - Spatial Survey Data 1996-1998 for details of these surveys). Physical Snapshots Surveys 1(PS01) & 2(PS02) took the form of a number of rapidly deployed CTD's and underway data collection. For Physical Snapshots Surveys 3(PS03), 4(PSO4) & 5(PS05) only the underway system was deployed.

The Huon Estuary Study was undertaken by CSIRO Marine Research between 1996 and 1998. The Huon Estuary is in South Eastern Tasmania. This record references the data from the Physical Snapshot (PS) surveys. See the Documentation Link below in this record for an overview of all the surveys undertaken in this survey.The Physical Snapshot surveys were carried out on the day before a number of the Spatial (HES) surveys as follows: PS01 was undertaken directly before HES4 PS02 before HES5 PS03 before HES6 PS04 before HES9 and PS05 before HES10. These surveys were a combination of quickly deployed ctd's at a number of the Spatial Survey stations plus deployment of an underway data collecting system. For Physical Snapshots Surveys 3(PS03), 4(PSO4) & 5(PS05) only the underway system was deployed. From PS03 onwards data was collected by the underway system at nominally 0.5 and 1 m depths.

This dataset describes data collected from 5/11/96 to 5/10/98 in the Huon Estuary, Tasmania at weekly or fortnightly time frames depending on algal bloom conditions. Data were collected at five of the biological station from the Huon Estuary Spatial Surveys (see separate MarLIN entry). The five stations were located at Hideaway, Kilalla, and Wheatley's Bays, Brabazon Park and Port Cygnet. At each sampling station a CTD was deployed and three niskin bottle samples were taken, one at each of the surface, middle and bottom water layers. Bottle samples have been analysed for salinity, dissolved oxygen, nutrient and pigments. An integrated water sample (for algal presence data) and a phytoplankton net sample were also taken. During algal blooms spectral absorption was analysed and algal counts were calculated.

The Huon Estuary Study was undertaken by CSIRO Marine Research between 1996 and 1998. The Huon Estuary is in South Eastern Tasmania. This record references the CTD data from both the spatial (HES) and the weekly monitoring (CM) surveys of the Huon Estuary Study. For the spatial (HES) surveys this includes the raw, intermediate, processed and calibrated data. The record also references the software used to process this data together with the technical reports written in support of the datasets. Two ctd profilers were utilized during the spatial surveys, their deployment during the spatial surveys is described in a technical report CTD Data From the Spatial Surveys of the Huon Estuary, OMR-121/117. A technical report on the performance of the seabird ctd is Sea-Bird CTD Performance in a Salt-Wedge Estuary, OMR-116/117. For the weekly monitoring (CM) surveys only preliminary processing has been undertaken. A readme_cont_ctd.txt file describes the processing routine followed for the weekly monitoring surveys. This dataset has not been calibrated. There are also other problems with the weekly monitoring ctd data especially in terms of depth registration (see Lineage below). CTD deployment information (not the actual data) is stored in the project database which is described by the 'Huon Estuary Study 1996/1998 - Database' metadata record. A number of CTD's were also deployed during the Physical Snapshot Surveys (see Marlin record 'Huon Estuary Study 1996/1998 - Physical Snapshot Survey Data') These ctd's were quickly deployed, the data was not processed and they form part of the snapshot dataset along with underway data collected on the same day. For these reasons this data are not referenced by this metadata record and does not form part of the HES CTD dataset.

Data collection was in a seasonal (HES Surveys)and a weekly/fortnightly (CM Surveys) regime. Water quality and trace metal data were collected during the August/September 1998 Contaminants Survey (HES10A). This record references the hydrology, nutrients and water quality data for the Huon Estuary Study. This includes nitrite, nitrate, total dissolved nitrogen, total nitrogen, phosphate, total dissolved nitrogen, silicate, salinity, dissolved oxygen, ammonia, suspended solid and trace metal data. The final data for these data parameters has been loaded into the project database (and subsequently the oracle database) see Marlin record 'Huon Estuary Study-Database'. However, these final datasets along with any intermediate files have also been written to cdrom as text files for archiving purposes by the Data Centre, Hobart. Methods documentation has also been written to the archive cdrom. The completed Field Sheets for all surveys have been stored by the Data Centre-Hobart.

Process Study 1 was undertaken between 12-14 April 2005 in the Huon Estuary offshore from Hideaway Bay. During this Process Study, two sediment traps were deployed at each of two sites (near sites P3 and P4 from the spatial survey) on the bottom for 24 hours.Prior to the deployment of the traps surface sediment samples were collected with a benthic grab from each site. Each sediment trap consisted of three collection tubes, material from each tube was filtered on 47 mm GFF filters, with several filters required to filter all of the particualte matter from each tube. Combined filters from each of two tubes labeled A and B (typically 3 filters for each tube) were extracted for lipid analysis. Tube C was used either for isotopes or Fauna indent.

Process Study 2 was undertaken between 20-22 September 2005 in the Huon Estuary offshore from Hideaway Bay. During this Process Study, two sediment traps were deployed at each of two sites (near sites P3 and P4 from the spatial survey) on the bottom for 24 hours.Prior to the deployment of the traps surface sediment samples were collected with a benthic grab from each site. Each sediment trap consisted of three collection tubes, material from each tube was filtered on 47 mm GFF filters, with several filters required to filter all of the particualte matter from each tube. Combined filters from each of two tubes labeled A and B (typically 3 filters for each tube) were extracted for lipid analysis. Tube C was used either for isotopes or Fauna indent.

Hydrographic and chemical data were collected for a week in late July between 1994-1997 in order to survey the coastal hypoxia on Louisiana continental shelf. Nutrient, pigment, suspended sediment and station information data were also acquired. Data files provided in Microsoft Access format, from which NCEI provides a redundant copy in text format.