DQRID : D960119.4
Start DateStart TimeEnd DateEnd Time
11/28/1995000003/31/19962359
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Subject:
SGP/EBBR/E4 - Soil Moisture Probes Offscale
DataStreams:sgp30ebbrE4.b1, sgp15ebbrE4.b1
Description:
During numerous periods within the days listed above, individual soil
moisture probes indicated high or offscale, on the dry side.  The
calibration of the probes in Plevna soil by REBS was inadequate to
provide reliable soil moisture data. 

The data should be carefully inspected before use: soil moistures
less than 3 should be considered incorrect; recalculation of ave_shf 
e, and h may be made using only the soil moisture sets with valid
soil moisture values.

Affected data values are (# represents probe number):

15 minute: rr_sm#
30 minute: sm#, c_shf#, cs#, ces#, g#, ave_shf, e, h

Sensible, latent, and soil heat fluxes can be recalculated using the soil
probe sets that provide correct data.  For example, if soil moisture 1 is
incorrect:

ave_shf = (g2 + g3 + g4 + g5)/4
e = -(q + ave_shf)/(1 +bowen)
h = -(e + ave_shf +q)
Suggestions: 
Recalculate sensible, latent, and soil heat fluxes using the appropriate
equations whenever one or more of the soil moisture values are reported as
less than 3.
Measurements:sgp30ebbrE4.b1:
  • Soil heat flow 3, corrected for soil moisture(corr_soil_heat_flow_3)
  • Soil heat flow 4, corrected for soil moisture(corr_soil_heat_flow_4)
  • Soil heat flow 5, corrected for soil moisture(corr_soil_heat_flow_5)
  • Soil moisture 2, gravimetric(soil_moisture_2)
  • Soil moisture 1, gravimetric(soil_moisture_1)
  • Surface soil heat flux, average of fluxes 1-5(surface_soil_heat_flux_avg)
  • Surface soil heat flux 5(surface_soil_heat_flux_5)
  • Surface soil heat flux 3(surface_soil_heat_flux_3)
  • Surface soil heat flux 4(surface_soil_heat_flux_4)
  • Surface soil heat flux 1(surface_soil_heat_flux_1)
  • Soil heat flow 1, corrected for soil moisture(corr_soil_heat_flow_1)
  • Soil heat flow 2, corrected for soil moisture(corr_soil_heat_flow_2)
  • Surface soil heat flux 2(surface_soil_heat_flux_2)
  • Change in energy storage 3, 0-5 cm soil layer(energy_storage_change_3)
  • Soil heat capacity 4(soil_heat_capacity_4)
  • Soil heat capacity 5(soil_heat_capacity_5)
  • Change in energy storage 2, 0-5 cm soil layer(energy_storage_change_2)
  • Soil heat capacity 2(soil_heat_capacity_2)
  • Change in energy storage 1, 0-5 cm soil layer(energy_storage_change_1)
  • Soil heat capacity 3(soil_heat_capacity_3)
  • Change in energy storage 5, 0-5 cm soil layer(energy_storage_change_5)
  • Change in energy storage 4, 0-5 cm soil layer(energy_storage_change_4)
  • Surface latent heat flux(latent_heat_flux)
  • Soil moisture 4, gravimetric(soil_moisture_4)
  • Soil moisture 3, gravimetric(soil_moisture_3)
  • Soil moisture 5, gravimetric(soil_moisture_5)
  • Soil heat capacity 1(soil_heat_capacity_1)
  • Surface sensible heat flux(sensible_heat_flux)
more
sgp15ebbrE4.b1:
  • Soil moisture 2 (resistance)(soil_moisture_2_r)
  • Soil moisture 1 (resistance)(soil_moisture_1_r)
  • Soil moisture 4 (resistance)(soil_moisture_4_r)
  • Soil moisture 3 (resistance)(soil_moisture_3_r)
  • Soil moisture 5 (resistance)(soil_moisture_5_r)
more

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