DQR ID | Subject | Data Streams Affected |
---|---|---|
D040217.2 | SGP/CO2FLX/C1 - Reprocessing User Notes | sgp30co2flx25mC1.b1, sgp30co2flx4mC1.b1, sgp30co2flx4mmetC1.b1, sgp30co2flx60mC1.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 |
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 |
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 |
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: | sgp30co2flx4mC1.b1:
sgp30co2flx4mmetC1.b1:
sgp30co2flx60mC1.b1:
sgp30co2flx25mC1.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: | sgp30co2flx4mC1.b1:
sgp30co2flx60mC1.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 |
---|---|---|---|
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 |
---|---|---|---|
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: | sgp30co2flx4mC1.b1:
sgp30co2flx4mmetC1.b1:
sgp30co2flx60mC1.b1:
sgp30co2flx25mC1.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:
|