DQR ID | Subject | Data Streams Affected |
---|---|---|
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 |
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 |
---|---|---|---|
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 |
---|---|---|---|
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:
|