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WATER QUATLITY MEASUREMENTS
Water Temperature
Water temperature at the depth of the sensor. (units = °C)
Salinity
A measurement of salt content of the water at the depth of the sensor. (units = Practical Salinity Scale 1978)
Sensor Depth
Distance sensors are below the water's surface. For sensors in a fixed position attached to a pier, depth measures the tidal range. (units = meters)
Chlorophyll
Phytoplankton pigment concentration estimated from fluorescence measurements. (units = µg/L)
Turbidity
Turbidity is a measure of relative clarity of the water. (units = nephelometric turbidity units, NTU)
METEORLOGICAL MEASUREMENTS
Air Temperature
Air temperature, typically measured 2 m above the ground. (units = °C)
Wind Speed
Velocity of wind measured 10 meters above the ground. (units = m/s & mph)
Wind Direction
Direction from which the wind is blowing, measured 10 meters above the ground. (units = ° & compass)
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)
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SFSU

SF-BEAMS is operated by Romberg Tiburon Center and San Francisco State University.

Member of CICORE - Center for Integrative Coastal Observation, Research and Education (California State University) and CeNCOOS - Central and Northern California Ocean Observing System

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