DQRID : D030711.3
Start DateStart TimeEnd DateEnd Time
06/30/2003100006/30/20032000
06/27/2003103006/27/20031300
07/10/2003143007/20/20030300
07/20/2003173007/21/20030230
07/21/2003193007/22/20030230
07/05/2003040007/10/20030500
07/23/2003163007/23/20031900
06/15/2003010006/23/20031900
07/22/2003173007/23/20030600
06/30/2003003006/30/20030730
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Subject:
SGP/EBBR/E27 - Soil Heat Flow #4 Incorrect
DataStreams:sgp30ebbrE27.b1, sgp15ebbrE27.b1
Description:
Soil Heat flow sensor #4 outputs were often very small negative numbers.

See below for a work-around.
Suggestions: 
Recalculate the average soil heat flow (ave_shf),
latent heat flux (e), and sensible heat flux (h) 
using only soil sets 1, 2, 3, and 5, as follows:

ave_shf = (g1 + g2 + g3 + g5)/4

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

h = -(q + e + ave_shf)

where q is net radiation and Bowen is the Bowen ratio.
Measurements:sgp15ebbrE27.b1:
  • Soil heat flow 4 (mV)(soil_heat_flow_4_mv)
more
sgp30ebbrE27.b1:
  • Soil heat flow 4(soil_heat_flow_4)
  • Surface soil heat flux 4(surface_soil_heat_flux_4)
  • Surface sensible heat flux(sensible_heat_flux)
  • Soil heat flow 4, corrected for soil moisture(corr_soil_heat_flow_4)
  • Surface latent heat flux(latent_heat_flux)
  • Surface soil heat flux, average of fluxes 1-5(surface_soil_heat_flux_avg)
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