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A salinometer. A salinometer is a device designed to measure the salinity, or dissolved salt content, of a solution.. Since the salinity affects both the electrical conductivity and the specific gravity of a solution, a salinometer often consist of an ec meter or hydrometer and some means of converting those readings to a salinity reading.
Sensors commonly scan at a rate of 24 Hz. Depth measurements are derived from measurement of hydrostatic pressure, and salinity is measured from electrical conductivity. [1] Sensors are arranged inside a metal or resin housing, the material used for the housing determining the depth to which the CTD can be lowered.
The depth of the water column that a satellite surface salinity measurement is sensitive to depends on the frequency (or wavelength) of the radiance that is being measured. For instance, the optical depth for seawater at the 1.413 GHz microwave frequency, used for the Aquarius mission, is about 1–2 cm. [ 1 ]
The oceanic average sea surface salinity is about 35 PSS (or 3.5% salt) and varies globally from 32 to 37 PSS. The Aquarius mission goal is to measure changes in salinity of 0.2 PSS. [7] Aquarius measured sea surface salinity by using radiometers to detect changes in the oceans microwave thermal emissions frequencies due to salinity. Aquarius ...
Salinity. A salinity sensor (specifically, a highly accurate pair of conductivity and temperature sensors) is used to measure sea surface salinity at the base of the surface float. This can also be done deeper on the tether between the float and the drogue. [15] Wind. A sonic anemometer and a wind vane are used to measure wind speed and wind ...
Salinity (/ s ə ˈ l ɪ n ɪ t i /) is the saltiness or amount of salt dissolved in a body of water, called saline water (see also soil salinity). It is usually measured in g/L or g/kg (grams of salt per liter/kilogram of water; the latter is dimensionless and equal to ‰ ).
A rosette sampler is made of an assembly of 12 to 36 sampling bottles. [1] Each bottle is a volume that range from a minimum value of 1.2 L to a maximum value of 30 L. [1] The bottles are clustered around a cylinder situated in the center of the assembly, [1] where there is a sensing system called Sea-Bird or CTD, that stands for "Conductivity, Temperature and Depth", although other variables ...
A temperature sensor is used to estimate the sound velocity at the instrument position using the seawater equation of state, and uses this to estimate scale the frequency shift to water velocities. This procedure assumes that the salinity has a preconfigured constant value. Finally, the results are saved to internal memory or output online to ...
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