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WATER QUATLITY MEASUREMENTS
Sensor Depth
Distance the sensors are below the water's surface. The sensors are in a fixed position attached to a pier, so depth also measures tidal range. (units = meters or feet)
Water Temperature
Water temperature at sensor depth. (units = °C or °F)
Salinity
Salt content of the water at sensor depth. (units = Practical Salinity Scale 1978)
Chlorophyll
Phytoplankton pigment concentration at sensor depth estimated from fluorescence measurements. (units = µg chlorophyll L-1)
Turbidity
The clarity of the water at sensor depth. (units = nephelometric turbidity units, NTU)
Dissolved O2
The amount of oxygen dissolved in water. (units = mg L-1 or % of saturation)
pH
Acitdity or alkalinity of the water at sensor depth. (units = -log[H+])
Density
The mass per unit volume of water. (kg m-3)
METEORLOGICAL MEASUREMENTS
Air Temperature
Air temperature, measured 2 m above the ground. (units = °C)
Wind Speed
Velocity of wind measured 10 meters above the ground. (units = m s-1 & mph)
Wind Direction
Direction from which the wind is blowing, measured 10 meters above the ground. (units = ° or compass direction)
Relative Humidity
Amount of atmospheric moisture present relative to the total amount of moisture that the air can hold. (units = % of saturation)
Precipitation
Total rainfall, snowfall, sleet... (units = mm of water)
Photosynthetically Available Radiation (PAR)
Measurement of light available to plants for photosynthesis [wavelengths 400-700 nm]. (units = µmol quanta m-2 s-1)