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Campbell–Stokes recorder used in a tropical region. A Campbell–Stokes recorder adapted for use in polar regions (The right sphere is facing south) The Campbell–Stokes recorder (sometimes called a Stokes sphere) is a type of sunshine recorder. It was invented by John Francis Campbell in 1853 and modified in 1879 by Sir George Gabriel Stokes.
A Campbell–Stokes sunshine recorder. A sunshine recorder is a device that records the amount of sunshine at a given location or region at any time. The results provide information about the weather and climate as well as the temperature of a geographical area.
For the specific purpose of sunshine duration recording, Campbell–Stokes recorders are used, which use a spherical glass lens to focus the sun rays on a specially designed tape. When the intensity exceeds a predetermined threshold, the tape burns.
Created Date: 8/30/2012 4:52:52 PM
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Campbell–Stokes recorder – Evapotranspiration [2] Water budget method; Basin water balance – Evaporation pan – Lysimetry – Soil moisture depletion – Water vapor transfer method; Bowen ratio – considers the energy budget; Eddy covariance – Component analysis; Porometry/Sap flow – Interception loss – Soil evaporation – Large ...
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