SGP/EBBR/E12  - Water in Net Radiometer, Surface Fluxes Incorrect

The net radiometer top dome was punctured by migrating birds.  This alone does not cause 
incorrect net radiation measurements.  However, when it subsequently rains, water collects 
in the bottom dome, causing the net radiation measurements to be too large during the 
day and too small at night.

• net_radiation_mv

• net_radiation

• net_radiation
• sensible_heat_flux
• latent_heat_flux

SGP/EBBR/E12 - Pressure Sensor Measurement Scales With Battery Voltage

The barometer output was scaling with supply voltage (i.e. it 
               followed the charging of the battery by the solar panel).

               NOTE: The barometer was replaced later than the end date of 
               this DQR.  Why the problem ended on 26 Nov 2003 is unclear; 
               there was no site ops intervention on that date.

               The problem did not affect the sensible and latent heat flux 
               calculations beyond the expected system error.

• atmos_pressure_mv

• Barometric Pressure(atmos_pressure)

• Barometric Pressure(atmos_pressure)

SGP/EBBR/E12 - 6 Month Checks

Many measurements were incorrect while the AEM was positioned with both aspirators at the 
same height for comparison checks.

• temp_trh_right_rr
• temp_trh_left_rr
• temp_air_left
• rh_left_mv
• rh_right_mv
• temp_air_right

• rh_bottom_fraction
• temp_air_top
• vapor_pressure_top
• temp_trh_top
• vapor_pressure_bottom
• temp_air_bottom
• rh_top_fraction
• temp_trh_bottom

• temp_air_top
• temp_air_bottom
• rh_top_fraction
• temp_trh_top
• temp_trh_bottom
• vapor_pressure_bottom
• sensible_heat_flux
• latent_heat_flux
• bowen_ratio
• vapor_pressure_top
• rh_bottom_fraction

SGP/EBBR/E12 - Pressure Sensor Measurement Scales With Battery Voltage

The barometer output scaled with supply voltage (it followed the charging of the battery 
by the solar panel).

The problem did not affect the sensible and latent heat flux calculations
beyond the expected system error.

• atmos_pressure_mv

• Retrieved pressure profile(pres)

• Barometric Pressure(atmos_pressure)

SGP/EBBR/E12  - Wind Speed Sensor Frozen By Ice Storm

The wind speed sensor was frozen stopped by ice from a storm.  The wind speed 
and residual wind speed measurements are incorrect.

• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

• wspd_vec_mean
• wspd_arith_mean

SGP/EBBR/E12  - Wind Speed Frozen Stopped By Ice

An ice storm froze the wind speed sensor to a stopped condition.

The wind speed and residual wind speed measurements are incorrect.

This sensor failure does not affect the sensible and latent heat fluxes.

• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

• wspd_vec_mean
• wspd_arith_mean

SGP/EBBR/E12 - Incorrect Times

The ntpd server (time adjustment) stopped working on Feb. 19th at 22:12:16 GMT, and the 
clock was corrected by -5600.177269 seconds on March 10th at 22:47 GMT. The recorded times 
for observations are off by amounts ranging from 0 seconds on Feb. 19th to 5600 seconds 
on March 10th.

• soil_temp_1_rr
• wspd_arith_mean
• soil_moisture_5_rr
• home_signal
• rh_right_mv
• soil_moisture_2_rr
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_2_rr
• temp_air_left
• base time(base_time)
• battery_voltage
• soil_heat_flow_4_mv
• soil_moisture_3_rr
• temp_air_right
• soil_moisture_1_rr
• soil_temp_4_rr
• soil_heat_flow_1_mv
• temp_trh_left_rr
• soil_temp_5_rr
• wdir_vec_mean_mv
• net_radiation_mv
• soil_heat_flow_5_mv
• temp_trh_right_rr
• Time offset of tweaks from base_time(time_offset)
• rh_left_mv
• atmos_pressure_mv
• temp_reference_rr
• soil_temp_3_rr
• soil_heat_flow_2_mv

• Barometric Pressure(atmos_pressure)
• temp_air_bottom
• wdir_vec_std
• net_radiation
• wspd_vec_mean
• vapor_pressure_top
• temp_trh_top
• vapor_pressure_bottom
• rh_bottom_fraction
• temp_reference
• temp_air_top
• time(time)
• home_signal
• temp_trh_bottom
• Time offset of tweaks from base_time(time_offset)
• wspd_arith_mean
• wdir_vec_mean
• rh_top_fraction
• base time(base_time)

• null(Raw data stream - documentation not supported)

• Estimated height of the vegetation.(vegetation_height)
• Soil heat capacity 2(cs2)
• volumetric soil moisture, site 5(sm5)
• net radiation(q)
• Soil heat capacity 3(cs3)
• Soil heat capacity 4(cs4)
• 0-5 cm integrated soil temperature, site 3(ts3)
• soil heat flow, site 3(g3)
• Aerodynamic Latent heat flux(ale)
• 0-5 cm integrated soil temperature, site 2(ts1)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• soil heat flow, site 4(g4)
• wind direction (relative to true north)(wind_d)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• 0-5 cm integrated soil temperature, site 5(ts5)
• Friction velocity(austar)
• bottom air temperature(tair_bot)
• 0-5 cm integrated soil temperature, site 2(ts2)
• h(h)
• Soil heat capacity 1(cs1)
• Bottom humidity(hum_bot)
• Best estimate Sensible heat flux(hcomb)
• Best estimate Latent heat flux(ecomb)
• Temperature of the top humidity chamber(thum_top)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• top vapor pressure(vp_top)
• Top humidity(hum_top)
• Reference Thermistor Temperature(tref)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Soil heat capacity 5(cs5)
• 5 cm soil heat flow, site 1(shf1)
• 5 cm soil heat flow, site 2(shf2)
• Retrieved pressure profile(pres)
• Time offset of tweaks from base_time(time_offset)
• soil heat flow, site 2(g2)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• latent heat flux(e)
• top air temperature(tair_top)
• scalar wind speed(wind_s)
• volumetric soil moisture, site 1(sm1)
• soil heat flow, site 1(g1)
• 5 cm soil heat flow, site 4(shf4)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• volumetric soil moisture, site 2(sm2)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• 5 cm soil heat flow, site 3(shf3)
• soil heat flow, site 5(g5)
• volumetric soil moisture, site 4(sm4)
• 0-5 cm integrated soil temperature, site 4(ts4)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• bottom vapor pressure(vp_bot)
• vector wind speed(res_ws)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• base time(base_time)
• 5 cm soil heat flow, site 5(shf5)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• volumetric soil moisture, site 3(sm3)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• average surface soil heat flow(ave_shf)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• Aerodynamic Sensible heat flux(ah)
• 0-5 cm change in soil heat storage with time, site 4(ces4)

• soil_temp_5
• soil_moisture_1
• soil_temp_2
• home_signal_30
• temp_trh_bottom
• base time(base_time)
• wdir_vec_std
• vapor_pressure_bottom
• soil_temp_4
• corr_soil_heat_flow_1
• corr_soil_heat_flow_2
• rh_bottom_fraction
• Barometric Pressure(atmos_pressure)
• soil_heat_capacity_5
• wdir_vec_mean
• surface_soil_heat_flux_3
• wspd_vec_mean
• soil_temp_1
• wspd_arith_mean
• energy_storage_change_2
• soil_moisture_2
• soil_heat_capacity_2
• soil_heat_flow_2
• soil_moisture_4
• energy_storage_change_1
• temp_air_bottom
• soil_heat_flow_3
• soil_heat_capacity_4
• soil_moisture_5
• Time offset of tweaks from base_time(time_offset)
• energy_storage_change_3
• soil_heat_capacity_3
• energy_storage_change_4
• soil_moisture_3
• surface_soil_heat_flux_avg
• soil_heat_flow_5
• sensible_heat_flux
• soil_heat_capacity_1
• bowen_ratio
• energy_storage_change_5
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• corr_soil_heat_flow_3
• temp_air_top
• corr_soil_heat_flow_5
• rh_top_fraction
• surface_soil_heat_flux_2
• surface_soil_heat_flux_5
• temp_reference
• soil_temp_3
• soil_heat_flow_1
• temp_trh_top
• soil_heat_flow_4
• latent_heat_flux
• corr_soil_heat_flow_4
• home_signal_15
• vapor_pressure_top
• net_radiation

SGP/EBBR/E12 - 6 Month Checks

Many measurements were incorrect while the AEM was positioned with both aspirators at the 
same height for comparison checks.

• temp_trh_right_rr
• temp_trh_left_rr
• temp_air_left
• rh_left_mv
• rh_right_mv
• temp_air_right

• rh_bottom_fraction
• temp_air_top
• vapor_pressure_top
• temp_trh_top
• vapor_pressure_bottom
• temp_air_bottom
• rh_top_fraction
• temp_trh_bottom

• temp_air_top
• temp_air_bottom
• rh_top_fraction
• temp_trh_top
• temp_trh_bottom
• vapor_pressure_bottom
• sensible_heat_flux
• latent_heat_flux
• bowen_ratio
• vapor_pressure_top
• rh_bottom_fraction

SGP/EBBR/E12 - AEM home_15 Incorrect, Flux Measurements not affected

The home_15 measurement was incorrect during much of the stated period.
The AEM was exchanging however, and thus the flux measurements were not affected.

• home_signal

• home_signal

• home_signal_15

SGP/EBBR/E12  - Wind Speed Frozen Stopped By Ice Storm

An ice storm froze the wind speed sensor to a stopped condition.

The wind speed and residual wind speed measurements are incorrect.

This sensor failure does not affect the sensible and latent heat fluxes.

• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

• wspd_vec_mean
• wspd_arith_mean

SGP/EBBR/E12  - Wind Direction Frozen Stopped By Ice Storm

The wind direction sensor was frozen stopped by ice from a storm.  
The wind direction, sigma_wd, and residual wind speed measurements 
are incorrect.

• wdir_vec_mean_mv

• wdir_vec_mean
• wdir_vec_std
• wspd_vec_mean

• wdir_vec_mean
• wspd_vec_mean
• wdir_vec_std

SGP/EBBR/E12  - Wind Speed Frozen Stopped By Ice

An ice storm froze the wind speed sensor to a stopped condition.

The wind speed and residual wind speed measurements are incorrect.

This sensor failure does not affect the sensible and latent heat fluxes.

• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

• wspd_vec_mean
• wspd_arith_mean

SGP/EBBR/E12  - Wind Direction Frozen Stopped By Ice

The wind direction sensor was frozen stopped by ice from a storm.  
The wind direction, sigma_wd, and residual wind speed measurements 
are incorrect.

• wdir_vec_mean_mv

• wdir_vec_mean
• wdir_vec_std
• wspd_vec_mean

• wdir_vec_mean
• wspd_vec_mean
• wdir_vec_std

SGP/EBBR/E12 - Wind Speed and Direction Frozen by Ice Storm

The wind speed and direction sensors were frozen by ice from and ice storm.

• wspd_arith_mean
• wdir_vec_mean_mv

• wdir_vec_mean
• wdir_vec_std
• wspd_arith_mean
• wspd_vec_mean

• wdir_vec_mean
• wspd_vec_mean
• wdir_vec_std
• wspd_arith_mean

SGP/EBBR/E12 - metadata corrections

On 20050723, a series of metadata corrections and additions were completed.  These 
metadata changes apply to all EBBR.E12 data collected by ARM back to the installation of the 
instrument in August 1993. Please see the current metadata for correct information.  These 
changes do not affect data values or quality.  

The changes are summarized below:
1) Update of "sensor location" information
2) Addition of installation dates for the systems
3) Correction of soil type
4) Correction of soil moisture units (from "by volume" to "gravimetric")

• base time(base_time)

• base time(base_time)

• base time(base_time)

SGP/EBBR/E12 - Sensible and Latent Heat Fluxes Incorrect at Times

Large spikes in soil temperature #2 are causing the soil heat storage
term to blow up, and thus the average soil heat flow, sensible heat flux, 
and latent heat flux to be incorrect at times.

• soil_temp_2_rr

• energy_storage_change_2
• surface_soil_heat_flux_avg
• surface_soil_heat_flux_2
• sensible_heat_flux
• latent_heat_flux

SGP/EBBR/E12 - Multiplexer failure

Sensible and latent heat fluxes are incorrect during a period when multiplexer #2 
experienced a failure.

• temp_air_left
• temp_air_right

• rh_bottom_fraction
• net_radiation
• temp_air_top
• vapor_pressure_top
• Barometric Pressure(atmos_pressure)
• vapor_pressure_bottom
• temp_air_bottom
• rh_top_fraction

• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• Barometric Pressure(atmos_pressure)
• soil_heat_flow_2
• soil_moisture_4
• soil_moisture_1
• temp_air_top
• temp_air_bottom
• soil_heat_flow_3
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_2
• surface_soil_heat_flux_5
• soil_heat_flow_1
• soil_moisture_3
• surface_soil_heat_flux_avg
• soil_heat_flow_5
• soil_heat_flow_4
• vapor_pressure_bottom
• sensible_heat_flux
• latent_heat_flux
• soil_moisture_2
• vapor_pressure_top
• net_radiation