DQR ID | Subject | Data Streams Affected |
---|---|---|
D040212.4 | SGP/PGS/C1 - Reprocessing User Notes | sgppgsC1.b1 |
D040217.2 | SGP/CO2FLX/C1 - Reprocessing User Notes | sgp30co2flx25mC1.b1, sgp30co2flx4mC1.b1, sgp30co2flx4mmetC1.b1, sgp30co2flx60mC1.b1 |
D040217.3 | SGP/CO2FLX/C1 - Reprocessing User Notes | sgp30co2flx4mmetC1.b1 |
D040505.5 | SGP/CO2FLX/C1 - Longwave Radiation Incorrect | sgp30co2flx4mmetC1.b1 |
D041015.2 | SGP/PGS/C1 - Reprocessing User Notes | sgppgsC1.b1 |
D041026.1 | SGP/CO2FLX/C1 - Reprocess: Units | sgp30co2flx25mC1.b1, sgp30co2flx4mC1.b1, sgp30co2flx60mC1.b1 |
D041103.1 | SGP/CO2FLX/C1 - Mean CO2 density incorrect, CO2 flux suspect | sgp30co2flx60mC1.b1 |
D050111.1 | SGP/PGS/C1 - Incorrect 60m Data | sgppgsC1.b1 |
D050316.1 | SGP/CO2FLX/C1 - Reprocessed: User Notes | sgp30co2flx4mmetC1.b1 |
D051116.2 | SGP/CO2FLX/C1 - downwelling longwave hemispheric irradiance incorrect | sgp30co2flx4mmetC1.b1 |
D051116.3 | SGP/CO2FLX/C1 - Soil Temperature measurements | sgp30co2flx4mmetC1.b1 |
D051118.1 | SGP/PGS/C1 - Suspicious 4m data | sgppgsC1.b1 |
D051118.2 | SGP/PGS/C1 - Suspicious 2m data | sgppgsC1.b1 |
D051118.3 | SGP/PGS/C1 - Suspicious 25m and 60m data | sgppgsC1.b1 |
D051118.4 | SGP/PGS/C1 - Updated files | sgppgsC1.b1 |
D060107.1 | SGP/CO2FLX/C1 - Reprocess: calibration error | sgp30co2flx4mC1.b1 |
D060510.1 | SGP/CO2FLX/C1 - Met stand was moved | sgp30co2flx4mmetC1.b1 |
D070416.4 | SGP/CO2FLX/C1 - downwelling longwave hemispheric irradiance incorrect | sgp30co2flx4mmetC1.b1 |
D070803.2 | SGP/CO2FLX/C1 - Disturbance around site | sgp30co2flx25mC1.b1, sgp30co2flx4mC1.b1, sgp30co2flx4mmetC1.b1, sgp30co2flx60mC1.b1 |
D070918.3 | SGP/CO2FLX/C1 - Farm operation | sgp30co2flx4mmetC1.b1 |
D071011.2 | SGP/CO2FLX/C1 - Reprocess: 4m instruments height | sgp30co2flx4mC1.b1 |
D081202.1 | SGP/CO2FLX/C1 - Reprocessed: Recalibration | sgp30co2flx4mC1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/11/2001 | 0000 | 02/12/2004 | 2359 |
Subject: | SGP/PGS/C1 - Reprocessing User Notes |
DataStreams: | sgppgsC1.b1 |
Description: | Time Variables - to make the PGS system more consistent with LBNL's other data streams, the variable 'yyyymmddhhmmss' was renamed 'yyyydddhhmmss'. Also, at the bottom of each file, variables 'yyyy','mon','hour','min' were added for those users who prefer to use these variables instead. The new 'time' variable (seconds since midnight of the start of file) was added to make files compatible with the new recommendations. Quality Control Flags - to prevent confusion, the quality control flags 'qc_co2ppm' and 'qc_sum_co2' were combined. The flag 'qc_sum_co2' was elliminated and 'qc_co2ppm' now performs range checking on 'co2ppm' variable as well as checking values of all dependencies' qc flags. |
Measurements: | sgppgsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/18/2002 | 0000 | 02/17/2004 | 0000 |
Subject: | SGP/CO2FLX/C1 - Reprocessing User Notes |
DataStreams: | sgp30co2flx25mC1.b1, sgp30co2flx4mC1.b1, sgp30co2flx4mmetC1.b1, sgp30co2flx60mC1.b1 |
Description: | Format Changes: To comply with archive standards, the name of the unlimited dimention variable in the cdf level b1 files was changed from 'record' to 'time'. This does not affect data quality. |
Measurements: | sgp30co2flx60mC1.b1:
sgp30co2flx4mC1.b1:
sgp30co2flx25mC1.b1:
sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/18/2002 | 0000 | 12/18/2003 | 0000 |
Subject: | SGP/CO2FLX/C1 - Reprocessing User Notes |
DataStreams: | sgp30co2flx4mmetC1.b1 |
Description: | A subset of the radiation measurements had an incorrect gain applied to raw data in period from 20021218-20031218. To correct for this, a multiplicative correction factor of 1.11 were applied to raw data used for the following variables: r_down_short_hemisp r_down_long_hemisp r_up_short_hemisp r_up_long_hemisp Note that the long wave variables are computed by adding the black body thermal radiation from the radiometer body to each of the long wave signals. Hence, the multiplicative correction is applied to the raw long wave fluxes before adding in the flux from the radiometer body. |
Measurements: | sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/18/2003 | 0000 | 04/28/2004 | 1900 |
Subject: | SGP/CO2FLX/C1 - Longwave Radiation Incorrect |
DataStreams: | sgp30co2flx4mmetC1.b1 |
Description: | Long wave radiation values (r_up_long_hemisp, r_down_long_hemisp) are bad due to correction with bad radiometer body temperature (t_rad) resulting from a wiring issue. |
Measurements: | sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/11/2001 | 1156 | 08/31/2004 | 2359 |
Subject: | SGP/PGS/C1 - Reprocessing User Notes |
DataStreams: | sgppgsC1.b1 |
Description: | Precise Gas System (pgs) daily b1 files should have a dimension of 480, corresponding to a measurement every 3 minutes. Previously submitted files had a dimension of 481, the last time step of each individual file being mistakenly repeated. |
Measurements: | sgppgsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/18/2002 | 0000 | 10/12/2004 | 2359 |
Subject: | SGP/CO2FLX/C1 - Reprocess: Units |
DataStreams: | sgp30co2flx25mC1.b1, sgp30co2flx4mC1.b1, sgp30co2flx60mC1.b1 |
Description: | Mean CO2 density units are incorrectly labeled as umol m-3. Units should be labeled as mmol m-3. |
Measurements: | sgp30co2flx60mC1.b1:
sgp30co2flx4mC1.b1:
sgp30co2flx25mC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/13/2004 | 1900 | 10/20/2004 | 1800 |
Subject: | SGP/CO2FLX/C1 - Mean CO2 density incorrect, CO2 flux suspect |
DataStreams: | sgp30co2flx60mC1.b1 |
Description: | A problem was identified with the calibration of the instrument over the time period October 12, 2004 to October 20, 2004. The offset of the instrument is known to be incorrect over this time frame, and a study of the gain of the instrument is underway. |
Measurements: | sgp30co2flx60mC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/05/2005 | 0853 | 01/07/2005 | 2026 |
Subject: | SGP/PGS/C1 - Incorrect 60m Data |
DataStreams: | sgppgsC1.b1 |
Description: | Precise Gas system (PGS) data at 60m (channel 4) are incorrect. This problem is due to a freezing rain and ice storm that hit SGP Central facility on January 5, 2005. The 60m tower inlet was clogged with ice and consequently, no air was supplied to the PGS instrument. |
Measurements: | sgppgsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/18/2002 | 0000 | 03/15/2005 | 2359 |
Subject: | SGP/CO2FLX/C1 - Reprocessed: User Notes |
DataStreams: | sgp30co2flx4mmetC1.b1 |
Description: | Replacement of LI-200 sensor (total downwelling shortwave radiation, variable r_tot) by a new LI-190 sensor (upwelling photosynthetic photon flux density, variable ppfd_up). The new LI-190 sensor was: - installed on December 9, 2004. - being tested from December 9, 2004 to December 22, 2004. - operational after December 22, 2004. Consequently: 1. variable "r_tot" is filled with missing values (qc_r_tot = 1) after December 9, 2004, 2. variable "ppfd_up" is filled with missing values (qc_ppfd_up = 1) prior December 22, 2004. |
Measurements: | sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/28/2004 | 1900 | 11/16/2005 | 0000 |
Subject: | SGP/CO2FLX/C1 - downwelling longwave hemispheric irradiance incorrect |
DataStreams: | sgp30co2flx4mmetC1.b1 |
Description: | A problem was identified with the downwelling longwave hemispheric irradiance (variable "r_down_long_hemisp") calibration of our Kipp & Zonen CNR1 radiometer. The offset of the instrument is believed to be incorrect over the specified time frame, and a correction of the problem is underway. |
Measurements: | sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/18/2002 | 0000 | 11/16/2005 | 0000 |
Subject: | SGP/CO2FLX/C1 - Soil Temperature measurements |
DataStreams: | sgp30co2flx4mmetC1.b1 |
Description: | Current data quality check (qc) procedure does not catch spikes in soil temperature measurements. A new qc procedure is being tested and will improve the current procedure. |
Measurements: | sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/24/2004 | 0000 | 08/19/2005 | 0100 |
Subject: | SGP/PGS/C1 - Suspicious 4m data |
DataStreams: | sgppgsC1.b1 |
Description: | KNF pump for 4m height (channel 2) started to leak on November 24, 2004 and sampled air was consequently "contaminated" by indoor air. The pump was replaced on August 19, 2005. |
Measurements: | sgppgsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/22/2004 | 0000 | 08/19/2005 | 0100 |
Subject: | SGP/PGS/C1 - Suspicious 2m data |
DataStreams: | sgppgsC1.b1 |
Description: | KNF pump for 2m height (channel 1) started to leak on July 22, 2004 and sampled air was consequently "contaminated" by indoor air. The pump was replaced on August 19, 2005. |
Measurements: | sgppgsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/31/2005 | 0000 | 08/19/2005 | 0100 |
Subject: | SGP/PGS/C1 - Suspicious 25m and 60m data |
DataStreams: | sgppgsC1.b1 |
Description: | KNF pumps for 25m and 60m height (channel 3 and channel 4) started to leak on March 31, 2005 and sampled air was consequently "contaminated" by indoor air. The pumps were replaced on August 19, 2005. |
Measurements: | sgppgsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/11/2001 | 1156 | 10/31/2005 | 2359 |
Subject: | SGP/PGS/C1 - Updated files |
DataStreams: | sgppgsC1.b1 |
Description: | Dew point temperature (dpt) sensor (Vaisala DMT 142) was added to the system on May 24, 2005 to assess water trapping system efficiency. Consequently, variable "dpt" is filled with missing values (-999.99) prior measurements start date (May 24, 2005). |
Measurements: | sgppgsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/27/2005 | 0000 | 01/06/2006 | 2359 |
Subject: | SGP/CO2FLX/C1 - Reprocess: calibration error |
DataStreams: | sgp30co2flx4mC1.b1 |
Description: | A problem was identified with the calibration of the instrument performed on May 27, 2005. A study to correct this bad calibration is underway. |
Measurements: | sgp30co2flx4mC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/11/2006 | 1530 | 04/19/2006 | 1500 |
Subject: | SGP/CO2FLX/C1 - Met stand was moved |
DataStreams: | sgp30co2flx4mmetC1.b1 |
Description: | Ameriflux program (Hank Loescher from Oregon state university) visits the site to intercompare his instruments with our 4m flux system. The met stand was moved by 30 feet and consequently: 1. Soil moisture sensors were disconnected, 2. Soil temperature sensors were disconnected, 3. Soil heat plates were disconnected, 4. The true direction of the anemometer boom was 230 degrees instead of the regular 270 degrees. |
Measurements: | sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/28/2004 | 0000 | 04/02/2007 | 1930 |
Subject: | SGP/CO2FLX/C1 - downwelling longwave hemispheric irradiance incorrect |
DataStreams: | sgp30co2flx4mmetC1.b1 |
Description: | Downwelling longwave radiation measurements (variable "r_down_long_hemisp") are bad due to a wiring issue. Users should not use the downwelling longwave hemispheric irradiance during this period. The downwelling shortwave and longwave radiation at CF is also available from the Broadband Radiometer Station (BRS). |
Measurements: | sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/24/2007 | 1300 | 07/26/2007 | 2359 |
Subject: | SGP/CO2FLX/C1 - Disturbance around site |
DataStreams: | sgp30co2flx25mC1.b1, sgp30co2flx4mC1.b1, sgp30co2flx4mmetC1.b1, sgp30co2flx60mC1.b1 |
Description: | A bulldozer used to excavate the SGP Tower anchors was right around (within 10 feet) our systems. |
Measurements: | sgp30co2flx60mC1.b1:
sgp30co2flx4mC1.b1:
sgp30co2flx25mC1.b1:
sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/22/2007 | 1830 | 09/07/2007 | 1800 |
Subject: | SGP/CO2FLX/C1 - Farm operation |
DataStreams: | sgp30co2flx4mmetC1.b1 |
Description: | Soil temperature, soil moisture, soil heat flux and upwelling surface radiation (long, short, and PAR) measurements were not valid from 20070822 to 20070907 due to farm operations. |
Measurements: | sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/17/2003 | 0000 | 10/11/2007 | 0000 |
Subject: | SGP/CO2FLX/C1 - Reprocess: 4m instruments height |
DataStreams: | sgp30co2flx4mC1.b1 |
Description: | The height of the 4m instruments is 4.8 m and not 4.65 m as shown in b1 datastream |
Measurements: | sgp30co2flx4mC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/26/2005 | 0000 | 01/11/2006 | 2359 |
Subject: | SGP/CO2FLX/C1 - Reprocessed: Recalibration |
DataStreams: | sgp30co2flx4mC1.b1 |
Description: | The 4m CO2 flux system was calibrated on May 25, 2005. After the calibration was performed, calibration coefficients used to measure CO2 density were not updated. This added an OFFSET to the CO2 density measurements. The data have been reprocessed to address the offset. The reprocessed data were archived in December 2008. Please retrieve the updated files for use in your analysis. |
Measurements: | sgp30co2flx4mC1.b1:
|