Data Quality Reports for Session: 117000 User: dmfoper Completed: 01/14/2009

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060107.1SGP/CO2FLX/C1 - Reprocess: calibration errorsgp30co2flx4mC1.b1
D070803.2SGP/CO2FLX/C1 - Disturbance around sitesgp30co2flx25mC1.b1, sgp30co2flx4mC1.b1, sgp30co2flx4mmetC1.b1, sgp30co2flx60mC1.b1
D071011.2SGP/CO2FLX/C1 - Reprocess: 4m instruments heightsgp30co2flx4mC1.b1
D081202.1SGP/CO2FLX/C1 - Reprocessed: Recalibrationsgp30co2flx4mC1.b1


DQRID : D060107.1
Start DateStart TimeEnd DateEnd Time
05/27/2005000001/06/20062359
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:
  • WPL corrected CO2 flux(fc_corr)
  • Water vapor density (q)(mean_q)
  • Latent heat flux(le)

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DQRID : D070803.2
Start DateStart TimeEnd DateEnd Time
07/24/2007130007/26/20072359
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:
  • mean co2 concentration (c)(mean_c)
  • WPL corrected CO2 flux(fc_corr)
sgp30co2flx4mC1.b1:
  • WPL corrected CO2 flux(fc_corr)
  • mean co2 concentration (c)(mean_c)
sgp30co2flx25mC1.b1:
  • mean co2 concentration (c)(mean_c)
  • WPL corrected CO2 flux(fc_corr)
sgp30co2flx4mmetC1.b1:
  • WPL corrected CO2 flux(fc_corr)
  • mean co2 concentration (c)(mean_c)

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DQRID : D071011.2
Start DateStart TimeEnd DateEnd Time
12/17/2003000010/11/20070000
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:
  • height of instument from tower base(zm)

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DQRID : D081202.1
Start DateStart TimeEnd DateEnd Time
05/26/2005000001/11/20062359
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:
  • mean co2 concentration (c)(mean_c)

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