SGP/EBBR/E15 - AEM Hung Between Home Positions, Surface Fluxes Incorrect

The AEM was hung inbetween home positions.

Therefore the sensible and latent heat fluxes are also incorrect.

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

• temp_air_top
• vapor_pressure_bottom
• rh_top_fraction
• latent_heat_flux
• temp_trh_bottom
• rh_bottom_fraction
• home_signal_30
• home_signal_15
• vapor_pressure_top
• bowen_ratio
• temp_trh_top
• temp_air_bottom
• sensible_heat_flux

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

SGP/EBBR/E15 - 6 Month Checks

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

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

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

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

SGP/EBBR/E15  - Net Radiometer Iced Over During Storm

The net radiometer was covered with ice from a storm.  Net radiation values are incorrect, 
and are sometimes even negative during the daytime.  Sensible and latent heat fluxes are 
therefore incorrect.

• net_radiation_mv

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation

SGP/EBBR/E15  - 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_vec_mean
• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/E15 - Wind Direction About 130 Degrees Low

The EBBR wind direction sensor developed an approximately -130 degree offset. The pin 
holding the vane to the shaft had fallen out.

• wdir_vec_mean_mv

• wdir_vec_mean
• wspd_vec_mean
• wdir_vec_std

• wdir_vec_mean
• wspd_vec_mean
• wdir_vec_std

SGP/EBBR/E15 - Net Radiometer not level

The EBBR net radiometer at E15 was suspected to be off of level
               because the daily peak net radiation was recorded later than it 
               was recorded by the SIRS.

               Site Ops found the EBBR net radiometer at E15 was significantly 
               off of level (1/2 bubble tipped to the north).  Adjustment of 
               the level improved the comparison of peak time with the 
               co-located SIRS.

               There was no significant effect on the sensible and latent heat 
               fluxes.

• net_radiation

• net_radiation

SGP/EBBR/E15  - 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_vec_mean
• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/E15 - Wind Speed Incorrect

The cups were broken off of the wind speed sensor by hail on 4/23/04. The cups were 
replaced on 4/27/04.  Wind speed measurements were near zero and incorrect during the indicated 
period.

• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• scalar wind speed(wind_s)
• vector wind speed(res_ws)

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/E15 - 6 Month Checks

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

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

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

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

SGP/EBBR/E15  - 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_vec_mean
• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/E15  - 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
• wspd_vec_mean
• wdir_vec_std

• wdir_vec_mean
• wspd_vec_mean
• wdir_vec_std

SGP/EBBR/E15  - 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_vec_mean
• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/E15  - 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
• wspd_vec_mean
• wdir_vec_std

• wdir_vec_mean
• wspd_vec_mean
• wdir_vec_std

SGP/EBBR/E15 - Net Radiation Too Large - Water in Bottom

Water in the bottom dome of the net radiometer made the measurements incorrectly large.  
Sensible and latent heat fluxes were therefore 
incorrect.

• net_radiation_mv

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation

SGP/EBBR/E15 - metadata corrections

On 20050723, a series of metadata corrections and additions were completed.  These 
metadata changes apply to all EBBR.E15 data collected by ARM back to the installation of the 
instrument in September 1992. 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/E15 - Net Radiation, Sensible and Latent Heat Fluxes Incorrect.

The top dome of the net radiometer was broken, resulting in net radiations that were too 
small, and thus sensible and latent heat fluxes that were too small.

• net_radiation_mv

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation