Bongo net
This is a plankton net used in the collection of zooplankton samples, two nets of differing mesh sizes were deployed over the side of the vessel and towed at varying depths at a low speed. The volume of water passed through each net was calculated using the diameter of the net, the distance and time towed. Once recovered, the cod ends were emptied into clean sample bottles.
Winnie the Pooh
Local Fishing vessel with a draught of 0.5m allowing safe passage up to the shallowest
parts of the estuary the King Harry Pontoon towards Truro. This agile little beauty
completed the fleet and enabled almost the whole estuary from mouth to freshwater
to be surveyed and sampled.
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ADCP
An Acoustic Doppler Current Profiler is a current meter used to measure the speed and directionality of the current, using the Doppler effect of sound waves to analyse the scatter back of the particles within the water column. They transmit and receive sound and the travel time is used to determine distance in X, Y and Z directions, using a minimum of three beams.
(Source: comm-
Flow meter
This instrument gives a reading of the direction and speed of the flow through the water column – this can give an indication of the tidal movement. It was deployed by hand from the pontoon.
Irradiance meter
An instrument used to measure the light intensity, comparatively between the surface probe and a probe at a chosen depth. Used on the pontoon and deployed by hand.
Horizontal niskin bottle
These are used to collect water samples at depth. The bottle was lowered over the side of the pontoon using a weighted cable and a messenger was sent down to close it once it had reached the desired depth.
Rosette & CTD
A rosette of remote activated Niskin bottles, that enable one to take multiple samples at different depths in the water column. This was used during the estuarine practical on R.V Bill Conway.
The CTD measures the conductivity (as an indication of salinity), temperature and pressure (an indication of depth). A CTD is usually incorporated into a Niskin bottle rosette to accompany these water samples.
665 Dosimat
Designed and used for liquid handling in laboratories, used in our case for the titration of sodium thiosulphate to determine oxygen concentration.
End point
When combined with the 665 Dosimat, the end point detector can be used to determine the clarity of the sample during titration. This is useful for the calculation of oxygen concentrations of our samples.
The bucket
When all else fails and you are unable to deploy your niskin bottle. There is always the traditional method of chucking a bucket and rope over the side to collect your water samples!
YSI multiprobe
This probe is a water quality sensor that measures parameters such as depth, temperature, chlorophyll and salinity. It was deployed from the side of the vessel from the surface to the desired depth using a cable and then retrieved. The depth of the seafloor was known as too avoid over extension and damage to the probe.
10-
Used to calculate chlorophyll concentrations from the filters of water samples collected. It is highly sensitive and portable which was ideal when transporting down from Southampton University.
U-
Used to measure how much the nutrients (nitrate, silicate, phosphate) absorb light as a beam of light passes through the samples
Microscope
The simple ones are usually the best… Microscopes were vital in identifying phytoplankton
and zooplankton species from water samples and zooplankton trawls.
Side scan
The side scan towfish was used to map the seafloor using sound transmission and detection, it was attached to a cable and run off the stern of the vessel. It produced a live feed of the sea floor in the area and had a swath of 75m.
MTS Explorer
The lightening quick 12m MTS Explorer was the Fastcat deployed for Habitat Mapping. It enabled fast transport to and from the sites of interest and was large enough to deploy a side scan towfish and video camera.
MTS Terramare
She is an 85ft multi-
RV Bill Conway
Bill Conway is an 11.74m A-
Disclaimer: All the opinions expressed in this site are that of Group 2 and not necessarily the University of Southampton or the National Oceanography Centre.
Video camera
The video camera was lowered and towed just above the sea floor during several transacts. It was linked to a live video view that was viewed on deck and provided a visual representation of the benthic habitat previously displayed by the side scan.
Index
| About Us |
| Overview of Falmouth |
| Biology |
| Physics |
| Chemistry |
| Physics & Chemistry |
| Biology |
| Physics & Chemistry |
| Equipment |
| Vessels |
| References |