EBBR E8 Adjustment of Negative Net Radiation Values

Please see DQR D980526.2 for some background information on the cause 
of the problem described here, and D980603.1 for correction to the data 
obtained with the previous net radiometer.

On 14 October 1997 a new CR10 program was installed at E8 EBBR.  The program
contained the wrong calibration coefficient for negative net radiations.
A multiplier had been left out of the computation of the coefficient by
the vendor. On 20 April 1998 a new net radiometer was installed.  It was
not noticed that the mutiplier was missing.  A slightly different 
calibration was entered for the net radiometer, again without the multiplier
applied.  A few weeks later the mentor, in trying to diagnose the obvious
incorrect negative net radiation values, discovered the missing multiplier.
A new program with the multiplier included was installed on 26 May 1998 at
1917 GMT.  

All negative net radiation values during the stated period above
need to be DIVIDED by 13.775.  Only the 5 minute and 30 minute q values are
affected.  The 15 minute mv_q values are correct.

Other values affected are 30 minute h and e, which would need to be 
recalculated from:

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

h = -(e + ave_shf + q)

Apply the correction to negative net radiation values for this period,
or flag the data with this comment.

• lon(lon)
• Top T/RH sensor temperature(temp_trh_top)
• Reference temperature in enclosure(temp_reference)
• Bottom air temperature(temp_air_bottom)
• Wind speed arithmetic mean(wspd_arith_mean)
• Bottom T/RH sensor temperature(temp_trh_bottom)
• Bottom relative humidity (fractional)(rh_bottom_fraction)
• base time in epoch(base_time)
• Top relative humidity (fractional)(rh_top_fraction)
• Net radiation(net_radiation)
• Top air temperature(temp_air_top)
• Time offset from base_time(time_offset)
• Wind speed vector mean(wspd_vec_mean)
• Atmospheric pressure(atmos_pressure)
• Wind direction vector mean(wdir_vec_mean)
• Wind direction vector mean standard deviation(wdir_vec_std)
• -180.0 - +180.0(alt)
• Bottom vapor pressure(vapor_pressure_bottom)
• AEM position indicator(home_signal)
• Top vapor pressure(vapor_pressure_top)
• North Latitude(lat)

• Soil moisture 3, gravimetric(soil_moisture_3)
• Soil moisture 4, gravimetric(soil_moisture_4)
• AEM position indicator 15 to 30 mins(home_signal_30)
• Soil moisture 5, gravimetric(soil_moisture_5)
• Bottom vapor pressure(vapor_pressure_bottom)
• Soil moisture 1, gravimetric(soil_moisture_1)
• Wind direction vector mean standard deviation(wdir_vec_std)
• Soil moisture 2, gravimetric(soil_moisture_2)
• Bottom air temperature(temp_air_bottom)
• Bottom T/RH sensor temperature(temp_trh_bottom)
• Wind speed arithmetic mean(wspd_arith_mean)
• Surface soil heat flux 5(surface_soil_heat_flux_5)
• Surface soil heat flux 3(surface_soil_heat_flux_3)
• lon(lon)
• Surface soil heat flux 4(surface_soil_heat_flux_4)
• Time offset from base_time(time_offset)
• Surface soil heat flux 1(surface_soil_heat_flux_1)
• Surface soil heat flux 2(surface_soil_heat_flux_2)
• Surface sensible heat flux(sensible_heat_flux)
• Half hour averaged soil temperature 5(soil_temp_5)
• North Latitude(lat)
• Soil temperature mean 3(soil_temp_3)
• Half hour averaged soil temperature 4(soil_temp_4)
• Soil temperature 1(soil_temp_1)
• Soil temperature 2(soil_temp_2)
• base time in epoch(base_time)
• Reference temperature in enclosure(temp_reference)
• -180.0 - +180.0(alt)
• Surface soil heat flux, average of fluxes 1-5(surface_soil_heat_flux_avg)
• Top air temperature(temp_air_top)
• Surface latent heat flux(latent_heat_flux)
• Wind direction vector mean(wdir_vec_mean)
• Bottom relative humidity (fractional)(rh_bottom_fraction)
• Wind speed vector mean(wspd_vec_mean)
• AEM position indicator 0 to 15 mins(home_signal_15)
• Soil heat capacity 1(soil_heat_capacity_1)
• Soil heat capacity 5(soil_heat_capacity_5)
• Soil heat capacity 4(soil_heat_capacity_4)
• Change in energy storage 5, 0-5 cm soil layer(energy_storage_change_5)
• Soil heat capacity 3(soil_heat_capacity_3)
• Change in energy storage 4, 0-5 cm soil layer(energy_storage_change_4)
• Soil heat capacity 2(soil_heat_capacity_2)
• 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)
• Atmospheric pressure(atmos_pressure)
• Top relative humidity (fractional)(rh_top_fraction)
• Top vapor pressure(vapor_pressure_top)
• Soil heat flow 1(soil_heat_flow_1)
• Soil heat flow 5, corrected for soil moisture(corr_soil_heat_flow_5)
• Net radiation(net_radiation)
• Bowen ratio(bowen_ratio)
• Soil heat flow 3, corrected for soil moisture(corr_soil_heat_flow_3)
• Top T/RH sensor temperature(temp_trh_top)
• Soil heat flow 4, corrected for soil moisture(corr_soil_heat_flow_4)
• Soil heat flow 1, corrected for soil moisture(corr_soil_heat_flow_1)
• Soil heat flow 3(soil_heat_flow_3)
• Soil heat flow 2, corrected for soil moisture(corr_soil_heat_flow_2)
• Soil heat flow 2(soil_heat_flow_2)
• Soil heat flow 5(soil_heat_flow_5)
• Soil heat flow 4(soil_heat_flow_4)