Data Quality Reports for Session: 184180 User: wblumberg Completed: 03/11/2017


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D040217.2SGP/CO2FLX/C1 - Reprocessing User Notessgp30co2flx60mC1.b1Does not affect quality
D041026.1SGP/CO2FLX/C1 - Reprocess: Unitssgp30co2flx60mC1.b1Does not affect quality
D041103.1SGP/CO2FLX/C1 - Mean CO2 density incorrect, CO2 flux suspectsgp30co2flx60mC1.b1Incorrect
D070803.2SGP/CO2FLX/C1 - Disturbance around sitesgp30co2flx60mC1.b1Incorrect


DQRID : D040217.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/18/2002000002/17/20040000Does not affect quality
Subject:
SGP/CO2FLX/C1 - Reprocessing User Notes
DataStreams: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:
  • Mean horizontal wind speed(mean_rot_u)
  • time_offset
  • Additive WPL H correction to fc(fc_wpl_h)
  • Mean CO2 density(mean_c)
  • Corrected sensible heat flux(h)
  • variance of variable t(var_t)
  • theta
  • Monin-Obukhov length scale(Lmoni)
  • WPL corrected latent heat flux(le)
  • site_latitude
  • Mean sonic temp(mean_t)
  • yyyydddhhmmss
  • friction velocity(ustar)
  • mean_p
  • Mean H2O density(mean_q)
  • doy
  • base_time
  • Wind direction, at 10-m height, 30-min intervals(wdir)
  • rotated variance v(var_rot_v)
  • Variance of rotated u(var_rot_u)
  • phi
  • site_longitude
  • rotated variance w(var_rot_w)
  • Variance of q(var_q)
  • site_elevation
  • zm
  • WPL LE correction to fc(fc_wpl_le)
  • WPL corrected CO2 flux(fc_corr)
  • Variance of co2 density(var_c)


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DQRID : D041026.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/18/2002000010/12/20042359Does not affect quality
Subject:
SGP/CO2FLX/C1 - Reprocess: Units
DataStreams: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:
  • Mean CO2 density(mean_c)


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DQRID : D041103.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
10/13/2004190010/20/20041800Incorrect
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:
  • Mean CO2 density(mean_c)
  • WPL corrected CO2 flux(fc_corr)


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DQRID : D070803.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
07/24/2007130007/26/20072359Incorrect
Subject:
SGP/CO2FLX/C1 - Disturbance around site
DataStreams: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 density(mean_c)
  • WPL corrected CO2 flux(fc_corr)


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