SurfaceHeatFlux
Last modified by Michael Sibayan on 2022/05/03 16:48
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Soil Heat Flux and Storage
The soil heat flux at the surface is calculated by adding the measured flux at a fixed depth, d, to the energy stored in the layer above the heat flux plates
(Campell Scientific "Soil Heat Flux Plate" manual)
More info can be found in the HFP-1 manual on Campbell Scientific's website: http://www.campbellsci.com/hfp01
Calculation Notes
| Sensor Code: | SurfaceHeatFlux |
| Sensor: | Computed data from 5TM, TCAV, and HFP-1/SC |
| Measurement: | Heat flux (Watts / m2) |
| Output 1: | Heat flux at surface for HFP-1 (Watts/m2) | Range 1: | -2000 to 2000 | |
| Output 2: | Heat flux at surface for HFP-1SC (Watts/m2) | Range 2: | -2000 to 2000 | |
| Output 3: | Average surface heat flux (Watts/m2) | Range 3: | -2000 to 2000 |
Moist soil heat capacity:
= bulk density (For LEO this is 1570 kg/m3)
= density of water (999 kg/m^3)
= the volumetric water content (decimal 0.0 to 0.5)
Cd = heat capacity of dry soil (0.89 kJ/kg/K)
Cw = heat capacity of water (4.179 kJ/kg/K)
Storage term = change in soil temperature
d = depth
t = output interval
Soil heat flux at the surface,
0
