SGP/EBBR/E13 - Fluxes Incorrect, AEM Problems

The AEM did not function properly, thus sensible and latent heat fluxes were incorrect.

• Left air temperature(tair_l)
• Right air temperature(tair_r)

• Temperature of bottom humidity sensor chamber(thum_bot)
• top vapor pressure(vp_top)
• top air temperature(tair_top)
• Temperature of the top humidity chamber(thum_top)
• bottom vapor pressure(vp_bot)
• Bottom humidity(hum_bot)
• Top humidity(hum_top)
• bottom air temperature(tair_bot)

• Bottom humidity(hum_bot)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• bottom vapor pressure(vp_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Temperature of the top humidity chamber(thum_top)
• latent heat flux(e)
• h(h)
• bottom air temperature(tair_bot)
• top air temperature(tair_top)
• Top humidity(hum_top)
• top vapor pressure(vp_top)

SGP/EBBR/E13 - Sensible and Latent Heat Fluxes Incorrect When Pressure Offscale

There were several half hours during this period when the pressure went offscale or at 
least to a high value, causing the sensible and latent heat fluxes to be incorrect.

• Atmospheric pressure(mv_pres)

• Retrieved pressure profile(pres)

• Retrieved pressure profile(pres)
• latent heat flux(e)
• h(h)

SGP/EBBR/E13 - Soil Heat Flow #3 Large Negative

During this period Soil Heat Flow #3 was sometimes incorrect (large negative); during 
those times, sensible and latent heat fluxes and average soil heat flux were sometimes (but 
not always incorrect).

• Soil heat flow 3(mv_hft3)

• soil heat flow, site 3(g3)
• 5 cm soil heat flow, site 3(shf3)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• average surface soil heat flow(ave_shf)
• latent heat flux(e)
• h(h)

SGP/EBBR/E13 - Pressure and Sensible and Latent Heat Fluxes Incorrect

During spikes in pressure upwards or downwards the sensible and latent heat fluxes were 
incorrect.

• Atmospheric pressure(mv_pres)

• Retrieved pressure profile(pres)

• Retrieved pressure profile(pres)
• latent heat flux(e)
• h(h)

SGP/EBBR/E13 - Most Measurements Incorrect When Battery Voltage Too low

Most measurements were incorrect during this period because the battery voltage was below 
10.5 volts.

• Soil moisture 2(r_sm2)
• Soil heat flow 2(mv_hft2)
• Soil moisture 3(r_sm3)
• Soil heat flow 3(mv_hft3)
• Soil moisture 4(r_sm4)
• Wind direction (relative to true north)(mv_wind_d)
• Soil moisture 1(r_sm1)
• Home signal(mv_home)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Left relative humidity(mv_hum_l)
• Soil moisture 5(r_sm5)
• Reference temperature(rr_tref)
• Net radiation(mv_q)
• Temperature of left humidity sensor chamber(rr_thum_l)
• scalar wind speed(wind_s)
• Soil heat flow 1(mv_hft1)
• Soil heat flow 4(mv_hft4)
• Soil temperature 3(rr_ts3)
• Soil temperature 4(rr_ts4)
• Soil temperature 5(rr_ts5)
• Right relative humidity(mv_hum_r)
• Soil heat flow 5(mv_hft5)
• Soil temperature 2(rr_ts2)
• Left air temperature(tair_l)
• Atmospheric pressure(mv_pres)
• Soil temperature 1(rr_ts1)
• Right air temperature(tair_r)

• Home signal(home)
• top air temperature(tair_top)
• Reference Thermistor Temperature(tref)
• bottom vapor pressure(vp_bot)
• Bottom humidity(hum_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• net radiation(q)
• vector wind speed(res_ws)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• wind direction (relative to true north)(wind_d)
• Retrieved pressure profile(pres)
• scalar wind speed(wind_s)
• Top humidity(hum_top)
• bottom air temperature(tair_bot)

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

SGP/EBBR/E13 - Battery failure

Data was missing entirely on parts of 10/22 and 10/23.

• Soil moisture 2(r_sm2)
• Soil heat flow 2(mv_hft2)
• Soil moisture 3(r_sm3)
• Soil heat flow 3(mv_hft3)
• Soil moisture 4(r_sm4)
• Wind direction (relative to true north)(mv_wind_d)
• Soil moisture 1(r_sm1)
• Home signal(mv_home)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Left relative humidity(mv_hum_l)
• Soil moisture 5(r_sm5)
• Reference temperature(rr_tref)
• Net radiation(mv_q)
• Temperature of left humidity sensor chamber(rr_thum_l)
• scalar wind speed(wind_s)
• Soil heat flow 1(mv_hft1)
• Soil heat flow 4(mv_hft4)
• Soil temperature 3(rr_ts3)
• Soil temperature 4(rr_ts4)
• Soil temperature 5(rr_ts5)
• Right relative humidity(mv_hum_r)
• Soil heat flow 5(mv_hft5)
• Soil temperature 2(rr_ts2)
• Left air temperature(tair_l)
• Atmospheric pressure(mv_pres)
• Soil temperature 1(rr_ts1)
• Right air temperature(tair_r)

• top air temperature(tair_top)
• Reference Thermistor Temperature(tref)
• bottom vapor pressure(vp_bot)
• Bottom humidity(hum_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• net radiation(q)
• vector wind speed(res_ws)
• Temperature of the top humidity chamber(thum_top)
• top vapor pressure(vp_top)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• wind direction (relative to true north)(wind_d)
• Retrieved pressure profile(pres)
• scalar wind speed(wind_s)
• Top humidity(hum_top)
• bottom air temperature(tair_bot)

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

SGP/EBBR/E13 - Radiometer dome broken

The top net radiometer dome was broken, yielding net radiation, sensible heat flux and 
latent heat flux that were too low.

The BEFLUX (SIRS) net radiation can be used as a replacement for the EBBR net radiation.

To correct the sensible and latent heat fluxes, determine the ratio of SIRS net radiation 
to EBBR net radiation for each daylight half hour and multiply that ratio times H and LE 
to obtain approximate corrected flux values.

• Net radiation(mv_q)

• net radiation(q)

• net radiation(q)
• latent heat flux(e)
• h(h)