DQRID : D980625.1
Start DateStart TimeEnd DateEnd Time
06/10/1998043006/22/19981230
more
Subject:
SGP/EBBR/E4 - Reprocess: E4 EBBR Soil Moisture #5 Offscale In Dry Conditions
DataStreams:sgp30ebbrE4.b1
Description:
The soil moisture dropped so low that soil moisture could not
be properly calculated by the polynomial equation that converts soil 
moisture sensor resistance into soil moisture percent.  This has happened
on occasion at other EBBR sites.  All 30 minute soil moisture #5 data for 
this period is incorrect (15 minute resistance values are okay); this 
affects the calculation of average soil heat flow through contamination
of the soil storage term and thus sensible and latent heat fluxes.  
The thirty minute values that are incorrect are:

  sm5, c_shf5, cs5, ces5, g5, ave_shf, e, h.
Suggestions: 
Recalculation of soil heat flux, and latent and sensible heat fluxes 
may be performed using the other four sets of soil probes, as below:

ave_shf = (g1 + g2 + g3 + g4)/4

e = -(q + ave_shf)/(1 + bowen)

h = -(e + ave_shf + q)
Measurements:sgp30ebbrE4.b1:
  • Soil heat capacity 5(soil_heat_capacity_5)
  • Soil heat flow 5, corrected for soil moisture(corr_soil_heat_flow_5)
  • Change in energy storage 5, 0-5 cm soil layer(energy_storage_change_5)
  • Soil moisture 5, gravimetric(soil_moisture_5)
  • Surface latent heat flux(latent_heat_flux)
  • 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 sensible heat flux(sensible_heat_flux)
more

Close this window