DQR ID | Subject | Data Streams Affected |
---|
D000301.6 | SGP/EBBR - EBBR E2 Net Radiation Incorrect | sgp15ebbrE2.a1, sgp30ebbrE2.a1, sgp5ebbrE2.a0 |
D971021.1 | SGP/EBBR/E7 - EBBR Biannual Checks | sgp15ebbrE7.a1, sgp30ebbrE7.a1, sgp5ebbrE7.a0 |
D971027.7 | SGP/EBBR/E2 - EBBR E2 Half Hour Incorrect | sgp30ebbrE2.a1 |
D980117.10 | SGP/EBBR/E2 - Reprocess: E2 Soil Heat Flow #4 Incorrect - Replaced | sgp15ebbrE2.a1, sgp30ebbrE2.a1 |
D980117.4 | | |
D980117.5 | SGP/EBBR/E26 - EBBR AEMs Not Exchanging (Iced Or Fuse Blown) | sgp15ebbrE26.a1, sgp30ebbrE26.a1, sgp5ebbrE26.a0 |
D980117.8 | SGP/EBBR/E2 - EBBR Net Radiometer Domes Pierced, Water Inside - Data Affected | sgp15ebbrE2.a1, sgp30ebbrE2.a1, sgp5ebbrE2.a0 |
D980410.2 | SGP/EBBR/E2 - EBBR E2 Wind Direction Sensors Frozen | sgp15ebbrE2.a1, sgp30ebbrE2.a1, sgp5ebbrE2.a0 |
D980413.6 | SGP/EBBR/E2 - EBBR E2 Incorrect Data | sgp15ebbrE2.a1, sgp30ebbrE2.a1, sgp5ebbrE2.a0 |
D980416.1 | SGP/EBBR/E2 - EBBR E2 3 Month Check | sgp15ebbrE2.a1, sgp30ebbrE2.a1, sgp5ebbrE2.a0 |
D980529.4 | SGP/EBBR/E2 - EBBR E2 Six Month Checks | sgp15ebbrE2.a1, sgp30ebbrE2.a1, sgp5ebbrE2.a0 |
D981112.4 | SGP/EBBR/E2 - EBBR E2 Net Radiation Incorrect - Water in Bottom Dome | sgp15ebbrE2.a1, sgp30ebbrE2.a1, sgp5ebbrE2.a0 |
D990128.5 | SGP/EBBR/E2 - EBBR E2 Wind Speed Data Incorrect | sgp15ebbrE2.a1, sgp30ebbrE2.a1, sgp5ebbrE2.00, sgp5ebbrE2.a0 |
D990202.1 | SGP/EBBR/E2 - Wind Speed Iced, Data Incorrect | sgp15ebbrE2.a1, sgp30ebbrE2.a1, sgp5ebbrE2.00, sgp5ebbrE2.a0 |
Subject: | SGP/EBBR/E7 - EBBR Biannual Checks |
DataStreams: | sgp15ebbrE7.a1, sgp30ebbrE7.a1, sgp5ebbrE7.a0
|
Description: | During EBBR 6-month checks the Automatic Exchange Mechanism is disabled
(reflected by home signals near zero) so that the two aspirator units
can be placed at the same height. The measurements during these periods
do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h),
or latent heat flux (e), nor do the air temperature and relative humidity
measurements indicate correct gradients. Checks performed before or after the
AEM is disabled also lead to some incorrect data. Incorrect 5, 15 minute and
half hour data occurs for periods indicated. |
Measurements: | sgp15ebbrE7.a1: - Temperature of left humidity sensor chamber(rr_thum_l)
- Temperature of right humidity sensor chamber(rr_thum_r)
- Left relative humidity(mv_hum_l)
- Left air temperature(tair_l)
- Right air temperature(tair_r)
- Right relative humidity(mv_hum_r)
sgp30ebbrE7.a1: - ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
- top air temperature(tair_top)
- Top humidity(hum_top)
- top vapor pressure(vp_top)
- bottom air temperature(tair_bot)
- bottom vapor pressure(vp_bot)
- Temperature of bottom humidity sensor chamber(thum_bot)
- latent heat flux(e)
- h(h)
- Bottom humidity(hum_bot)
- Temperature of the top humidity chamber(thum_top)
sgp5ebbrE7.a0: - Temperature of the top humidity chamber(thum_top)
- Bottom humidity(hum_bot)
- top air temperature(tair_top)
- bottom air temperature(tair_bot)
- top vapor pressure(vp_top)
- Top humidity(hum_top)
- Temperature of bottom humidity sensor chamber(thum_bot)
- bottom vapor pressure(vp_bot)
|
Subject: | SGP/EBBR/E2 - EBBR E2 Half Hour Incorrect |
DataStreams: | sgp30ebbrE2.a1
|
Description: | During one half hour period all data is incorrect. The problem appears to
be just a bad record as the two 15 minute periods during the half hour were
not affected. The cause of the problem is unknown. |
Measurements: | sgp30ebbrE2.a1: - lon(lon)
- 5 cm soil heat flow, site 2(shf2)
- soil heat flow, site 3(g3)
- Soil heat capacity 4(cs4)
- 0-5 cm change in soil heat storage with time, site 5(ces5)
- Dummy altitude for Zeb(alt)
- Soil heat capacity 5(cs5)
- ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
- 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
- 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
- soil heat flow, site 5(g5)
- 0-5 cm integrated soil temperature, site 5(ts5)
- 0-5 cm change in soil heat storage with time, site 2(ces2)
- lat(lat)
- 0-5 cm change in soil heat storage with time, site 2(ces1)
- standard deviation of wind direction (sigma theta)(sigma_wd)
- top vapor pressure(vp_top)
- Exchange mechanism position indicator (15 to 30 min)(home_30)
- Time offset of tweaks from base_time(time_offset)
- Exchange mechanism position indicator (0 to 15 min)(home_15)
- 0-5 cm integrated soil temperature, site 4(ts4)
- Reference Thermistor Temperature(tref)
- Soil heat capacity 3(cs3)
- bottom vapor pressure(vp_bot)
- wind direction (relative to true north)(wind_d)
- 0-5 cm integrated soil temperature, site 2(ts1)
- soil heat flow, site 1(g1)
- 0-5 cm change in soil heat storage with time, site 4(ces4)
- vector wind speed(res_ws)
- Temperature of bottom humidity sensor chamber(thum_bot)
- volumetric soil moisture, site 2(sm2)
- h(h)
- latent heat flux(e)
- scalar wind speed(wind_s)
- bottom air temperature(tair_bot)
- Bottom humidity(hum_bot)
- volumetric soil moisture, site 3(sm3)
- Soil heat capacity 2(cs2)
- soil heat flow, site 2(g2)
- top air temperature(tair_top)
- 5 cm soil heat flow, site 4(shf4)
- 5 cm soil heat flow, site 5(shf5)
- net radiation(q)
- volumetric soil moisture, site 5(sm5)
- 0-5 cm integrated soil temperature, site 2(ts2)
- Soil heat capacity 1(cs1)
- Top humidity(hum_top)
- 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
- volumetric soil moisture, site 4(sm4)
- 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
- 5 cm soil heat flow, site 3(shf3)
- 0-5 cm integrated soil temperature, site 3(ts3)
- volumetric soil moisture, site 1(sm1)
- base time(base_time)
- 0-5 cm change in soil heat storage with time, site 3(ces3)
- Temperature of the top humidity chamber(thum_top)
- average surface soil heat flow(ave_shf)
- 5 cm soil heat flow, site 1(shf1)
- soil heat flow, site 4(g4)
- 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
- Retrieved pressure profile(pres)
|
Subject: | SGP/EBBR/E2 - Reprocess: E2 Soil Heat Flow #4 Incorrect - Replaced |
DataStreams: | sgp15ebbrE2.a1, sgp30ebbrE2.a1
|
Description: | Soil heat flow probe #4 produced intermittently large positive
and negative values from October 1997 until 3 January 1998, after
which the values remained high until the probe was replaced on
8 January 1998 at 1711 GMT.
The following data values were affected for the period listed
above (when soil heat flow #4 was large):
15 minute: mv_hft4
30 minute: shf4, c_shf4, g4, ave_shf, e, h |
Measurements: | sgp15ebbrE2.a1: - Soil heat flow 4(mv_hft4)
sgp30ebbrE2.a1: - latent heat flux(e)
- 5 cm soil heat flow, site 4(shf4)
- 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
- soil heat flow, site 4(g4)
- h(h)
|
Subject: | SGP/EBBR/E2 - EBBR Net Radiometer Domes Pierced, Water Inside - Data Affected |
DataStreams: | sgp15ebbrE2.a1, sgp30ebbrE2.a1, sgp5ebbrE2.a0
|
Description: | The upper dome of the EBBR net radiometers was punctured.
After the puncture, water collected in the top and/or bottom dome. The
water was removed and the dome was replaced during PM visits.
In some cases, the puncture and water resulted in incorrect data.
Comparison with net radiation values from surrounding EBBR sites and the
SIRS is neccesary to determine if the EBBR net radiation data
are correct or incorrect.
It is often difficult to tell from the data when the punctures occurred,
but they would have existed for no more than 2 weeks, since the domes
are checked during each two-weekly PM visit.
Incorrect net radiation data results in the latent heat flux and
sensible heat flux also being incorrect. |
Measurements: | sgp15ebbrE2.a1:
sgp5ebbrE2.a0:
sgp30ebbrE2.a1: - latent heat flux(e)
- net radiation(q)
- h(h)
|
Subject: | SGP/EBBR/E2 - EBBR E2 Incorrect Data |
DataStreams: | sgp15ebbrE2.a1, sgp30ebbrE2.a1, sgp5ebbrE2.a0
|
Description: | During the indicated period, when either home signal is in the hundreds, all
soil heat fluxes, soil moistures, net radiation, air temperatures, bowen
ratio, sensible heat flux, and latent heat flux are incorrect. This
condition usually results from an AEM circuit problem that allows the home
signals to go high and corrupts the data. The cause has never been
determined.
Comments added by Marv Wesely:
David Cook said that this is a very rare occurence; it's happened about
three times in total for all EBBRs. The problem might be on the circuit
boards (moisture?), but that is only a guess. The problem has always
disappeared by itself after a while. |
Measurements: | sgp15ebbrE2.a1: - Soil heat flow 1(mv_hft1)
- Soil moisture 3(r_sm3)
- Soil heat flow 4(mv_hft4)
- Net radiation(mv_q)
- Soil moisture 5(r_sm5)
- Soil heat flow 2(mv_hft2)
- Soil heat flow 3(mv_hft3)
- Right air temperature(tair_r)
- Soil moisture 4(r_sm4)
- Soil moisture 1(r_sm1)
- Left air temperature(tair_l)
- Soil heat flow 5(mv_hft5)
- Soil moisture 2(r_sm2)
sgp5ebbrE2.a0: - bottom air temperature(tair_bot)
- top air temperature(tair_top)
- net radiation(q)
sgp30ebbrE2.a1: - latent heat flux(e)
- 5 cm soil heat flow, site 2(shf2)
- bottom air temperature(tair_bot)
- soil heat flow, site 3(g3)
- volumetric soil moisture, site 3(sm3)
- soil heat flow, site 2(g2)
- ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
- top air temperature(tair_top)
- 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
- 5 cm soil heat flow, site 4(shf4)
- 5 cm soil heat flow, site 5(shf5)
- 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
- soil heat flow, site 5(g5)
- net radiation(q)
- volumetric soil moisture, site 5(sm5)
- 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
- volumetric soil moisture, site 4(sm4)
- 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
- 5 cm soil heat flow, site 3(shf3)
- volumetric soil moisture, site 1(sm1)
- soil heat flow, site 1(g1)
- volumetric soil moisture, site 2(sm2)
- average surface soil heat flow(ave_shf)
- 5 cm soil heat flow, site 1(shf1)
- soil heat flow, site 4(g4)
- 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
- h(h)
|
Subject: | SGP/EBBR/E2 - EBBR E2 3 Month Check |
DataStreams: | sgp15ebbrE2.a1, sgp30ebbrE2.a1, sgp5ebbrE2.a0
|
Description: | During EBBR 3 month checks the Automatic Exchange Mechanism is disabled
(reflected by home signals near zero) so that the two aspirator units can be
placed at the same height. The measurements during these periods
do not produce correct outputs of bowen ratio (bowen), sensible heat flux
(h), or latent heat flux (e), nor do the air temperature and relative
humidity measurements indicate correct gradients. Checks performed before
or after the AEM is disabled also lead to some incorrect data. Incorrect 5,
15 minute and half hour data occurs for the period indicated. |
Measurements: | sgp15ebbrE2.a1: - Temperature of right humidity sensor chamber(rr_thum_r)
- Left relative humidity(mv_hum_l)
- Temperature of left humidity sensor chamber(rr_thum_l)
- Right air temperature(tair_r)
- Right relative humidity(mv_hum_r)
- Left air temperature(tair_l)
sgp5ebbrE2.a0: - Temperature of the top humidity chamber(thum_top)
- bottom air temperature(tair_bot)
- Temperature of bottom humidity sensor chamber(thum_bot)
- top air temperature(tair_top)
- Top humidity(hum_top)
- bottom vapor pressure(vp_bot)
- Bottom humidity(hum_bot)
- top vapor pressure(vp_top)
sgp30ebbrE2.a1: - latent heat flux(e)
- bottom air temperature(tair_bot)
- Bottom humidity(hum_bot)
- ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
- top air temperature(tair_top)
- Top humidity(hum_top)
- top vapor pressure(vp_top)
- bottom vapor pressure(vp_bot)
- Temperature of bottom humidity sensor chamber(thum_bot)
- Temperature of the top humidity chamber(thum_top)
- h(h)
|
Subject: | SGP/EBBR/E2 - EBBR E2 Six Month Checks |
DataStreams: | sgp15ebbrE2.a1, sgp30ebbrE2.a1, sgp5ebbrE2.a0
|
Description: | During EBBR 6 month checks (formally called 3 month checks) the Automatic
Exchange Mechanism is disabled (reflected by home signals near zero) so that
the two aspirator units can be placed at the same height. The measurements
during these periods do not produce correct outputs of bowen ratio (bowen),
sensible heat flux (h), or latent heat flux (e), nor do the air temperature
and relative humidity measurements indicate correct gradients. Checks
performed just before or after the AEM is disabled also lead to some
incorrect data. Incorrect 5, 15 minute and half hour data occurs for the
period indicated. |
Measurements: | sgp15ebbrE2.a1: - Temperature of right humidity sensor chamber(rr_thum_r)
- Left relative humidity(mv_hum_l)
- Temperature of left humidity sensor chamber(rr_thum_l)
- Right air temperature(tair_r)
- Right relative humidity(mv_hum_r)
- Left air temperature(tair_l)
sgp5ebbrE2.a0: - Temperature of the top humidity chamber(thum_top)
- bottom air temperature(tair_bot)
- Temperature of bottom humidity sensor chamber(thum_bot)
- top air temperature(tair_top)
- Top humidity(hum_top)
- bottom vapor pressure(vp_bot)
- Bottom humidity(hum_bot)
- top vapor pressure(vp_top)
sgp30ebbrE2.a1: - latent heat flux(e)
- bottom air temperature(tair_bot)
- Bottom humidity(hum_bot)
- ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
- top air temperature(tair_top)
- Top humidity(hum_top)
- top vapor pressure(vp_top)
- bottom vapor pressure(vp_bot)
- Temperature of bottom humidity sensor chamber(thum_bot)
- Temperature of the top humidity chamber(thum_top)
- h(h)
|
Subject: | SGP/EBBR/E2 - EBBR E2 Wind Speed Data Incorrect |
DataStreams: | sgp15ebbrE2.a1, sgp30ebbrE2.a1, sgp5ebbrE2.00, sgp5ebbrE2.a0
|
Description: | The wind speed sensor was iced stopped by freezing rain,
resulting in the following values being incorrect:
5 minute: wind_s, res_ws
15 minute: wind_s
30 minute: wind_s, res_ws, |
Measurements: | sgp5ebbrE2.00: - null(Raw data stream - documentation not supported)
sgp15ebbrE2.a1: - scalar wind speed(wind_s)
sgp5ebbrE2.a0: - vector wind speed(res_ws)
- scalar wind speed(wind_s)
sgp30ebbrE2.a1: - scalar wind speed(wind_s)
- vector wind speed(res_ws)
|