Data Quality Reports for Session: 104762 User: sxie Completed: 03/13/2007

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D051116.2SGP/CO2/C1 - downwelling longwave hemispheric irradiance incorrectsgp30co2flx4mmetC1.b1
D051116.3SGP/CO2/C1 - Soil Temperature measurementssgp30co2flx4mmetC1.b1


DQRID : D051116.2
Start DateStart TimeEnd DateEnd Time
04/28/2004190011/16/20050000
Subject:
SGP/CO2/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/CO2/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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