3 solar radiation, 4 soil temperature, Solar radiation – Campbell Scientific ET107 Evapotranspiration Monitoring Station User Manual
Page 12: Soil temperature, 1. effect of structure on wind flow
ET107 Weather Station
1.1.3 Solar Radiation
Pyranometers should be located to avoid shadows on the sensor at any time.
Mounting it on the southern most (northern hemisphere) portion of the weather
station will minimize the chance of shading from other weather station
structures. Reflective surfaces and sources of artificial radiation should be
avoided.
1.1.4 Soil Temperature
The measurement site for soil temperature should be at least 1 m
2
(10.76 ft
2
) and
typical of the surface of interest. The ground surface should be level with respect
to the immediate area of 10 m (32.81 ft) radius.
Standard measurement depths:
10.0 cm ± 1.0 cm (4 in ± 0.4 in) (AASC)
5.0 cm, 10.0 cm, 50.0 cm, 100.0 cm (2 in, 4 in, 19.7 in, 39.4 in) (WMO)
FIGURE 1-1. Effect of structure on wind flow
2
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