Data Quality Reports for Session: 114488 User: kaiserdp Completed: 09/30/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D051116.2SGP/CO2FLX/C1 - downwelling longwave hemispheric irradiance incorrectsgp30co2flx4mmetC1.b1
D051116.3SGP/CO2FLX/C1 - Soil Temperature measurementssgp30co2flx4mmetC1.b1
D070416.4SGP/CO2FLX/C1 - downwelling longwave hemispheric irradiance incorrectsgp30co2flx4mmetC1.b1


DQRID : D051116.2
Start DateStart TimeEnd DateEnd Time
04/28/2004190011/16/20050000
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:
  • downwelling longwave hemispheric irradiance t_rad corrected(r_down_long_hemisp)

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DQRID : D051116.3
Start DateStart TimeEnd DateEnd Time
12/18/2002000011/16/20050000
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:
  • average of two lower soil temperature sensors(mean_t_soil_lower)
  • average of two middle soil temperature sensors(mean_t_soil_middle)
  • average of two upper soil temperature sensors(mean_t_soil_upper)

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DQRID : D070416.4
Start DateStart TimeEnd DateEnd Time
04/28/2004000004/02/20071930
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:
  • downwelling longwave hemispheric irradiance t_rad corrected(r_down_long_hemisp)

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