SGP/EBBR/E20 - Soil Heat Flow Zero Under Unchanging Conditions

This DQR is written to inform users of the data that the EBBR soil heat flow
measurements of zero during much of 11 November 1995 at E20, Meeker, OK are
correct values.  Nearly unchanging conditions of net radiation, air
temperature, and soil moisture, plus high wind speeds and near neutral
atmospheric stability, resulted in almost unchanging conditions of
soil temperature and ten and a half hours of zero soil heat flow
output from all soil heat flow plates (some plates outputted zero for
longer than this).  The change in energy storage (determined from the
change in temperature with time of the soil above the plates) was very
nearly zero also during the period of interest.

Such an extended period of zero soil heat flow and the accompanying
unchanging soil and atmospheric conditions is quite rare and therefore
worth noting here in case someone using the data might mistakenly think
that the data is incorrect.

• Surface soil heat flux, average of fluxes 1-5(surface_soil_heat_flux_avg)
• AEM position indicator 0 to 15 mins(home_signal_15)
• Bowen ratio(bowen_ratio)
• Top air temperature(temp_air_top)
• Top T/RH sensor temperature(temp_trh_top)
• lon(lon)
• Bottom relative humidity (fractional)(rh_bottom_fraction)
• Reference temperature in enclosure(temp_reference)
• Surface sensible heat flux(sensible_heat_flux)
• -180.0 - +180.0(alt)
• Soil moisture 5, gravimetric(soil_moisture_5)
• Bottom T/RH sensor temperature(temp_trh_bottom)
• Soil moisture 4, gravimetric(soil_moisture_4)
• Soil moisture 3, gravimetric(soil_moisture_3)
• Soil moisture 2, gravimetric(soil_moisture_2)
• Bottom vapor pressure(vapor_pressure_bottom)
• Soil moisture 1, gravimetric(soil_moisture_1)
• North Latitude(lat)
• AEM position indicator 15 to 30 mins(home_signal_30)
• Wind direction vector mean(wdir_vec_mean)
• Surface soil heat flux 4(surface_soil_heat_flux_4)
• Surface soil heat flux 3(surface_soil_heat_flux_3)
• Surface soil heat flux 2(surface_soil_heat_flux_2)
• Surface soil heat flux 1(surface_soil_heat_flux_1)
• Soil heat capacity 5(soil_heat_capacity_5)
• Bottom air temperature(temp_air_bottom)
• Soil heat capacity 4(soil_heat_capacity_4)
• Surface latent heat flux(latent_heat_flux)
• Soil heat capacity 3(soil_heat_capacity_3)
• Soil heat capacity 2(soil_heat_capacity_2)
• Wind speed arithmetic mean(wspd_arith_mean)
• Surface soil heat flux 5(surface_soil_heat_flux_5)
• Soil temperature mean 3(soil_temp_3)
• Wind direction vector mean standard deviation(wdir_vec_std)
• Soil heat flow 4(soil_heat_flow_4)
• Net radiation(net_radiation)
• Soil heat capacity 1(soil_heat_capacity_1)
• Soil heat flow 5(soil_heat_flow_5)
• Half hour averaged soil temperature 4(soil_temp_4)
• Half hour averaged soil temperature 5(soil_temp_5)
• Soil heat flow 2(soil_heat_flow_2)
• Soil heat flow 3(soil_heat_flow_3)
• Soil heat flow 1(soil_heat_flow_1)
• Atmospheric pressure(atmos_pressure)
• Soil temperature 1(soil_temp_1)
• Soil temperature 2(soil_temp_2)
• Time offset from base_time(time_offset)
• Top relative humidity (fractional)(rh_top_fraction)
• Change in energy storage 3, 0-5 cm soil layer(energy_storage_change_3)
• Change in energy storage 2, 0-5 cm soil layer(energy_storage_change_2)
• Change in energy storage 1, 0-5 cm soil layer(energy_storage_change_1)
• Top vapor pressure(vapor_pressure_top)
• base time in epoch(base_time)
• Soil heat flow 4, corrected for soil moisture(corr_soil_heat_flow_4)
• Soil heat flow 3, corrected for soil moisture(corr_soil_heat_flow_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)
• Soil heat flow 5, corrected for soil moisture(corr_soil_heat_flow_5)
• Soil heat flow 2, corrected for soil moisture(corr_soil_heat_flow_2)
• Wind speed vector mean(wspd_vec_mean)
• Soil heat flow 1, corrected for soil moisture(corr_soil_heat_flow_1)