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Air Temperature and Humidity
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| Near-surface atmospheric temperature and relative humidty are measured by sensors that are combined into a single unit, made by Rainwise, attached to each bridge wing. Having two separate units provide redundancy in case of instrument failure. In addtion, during most periods when both units sensors are operational, the measurements from the upwind sensors are the ones that are reported and used in subsequent analysis since those are the ones least influenced by the vessel. Both sensors along with a fan are mounted in the unit's white PVC housing. The temperature sensor is a combination of thermistors and thermocouples. Temperature measurements have a resolution of 0.1°C and accuracy of 0.3 °C for a range between –50°C and +50°C. Humidity is measured using a thin film polymer capacitor mounted within a porous plastic filter. The measurements have an expected accuracy of 2% over the range 0 to 100 % and in temperatures ranging between –40°C and +85°C. |
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| The temperature and relative humidity sensors as depicted in the Rainwise (pdf) brochure. |
The temperature and relative humidity sensors are secured to each bridge wing. |
A close up of the temperature and relative humidity sensor on the bridge wing of the port side. |
