Data Quality Reports for Session: 117813 User: ql_data Completed: 02/25/2009

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D040217.2SGP/CO2FLX/C1 - Reprocessing User Notessgp30co2flx25mC1.b1, sgp30co2flx4mC1.b1, sgp30co2flx4mmetC1.b1, sgp30co2flx60mC1.b1
D041026.1SGP/CO2FLX/C1 - Reprocess: Unitssgp30co2flx25mC1.b1, sgp30co2flx4mC1.b1, sgp30co2flx60mC1.b1
D070803.2SGP/CO2FLX/C1 - Disturbance around sitesgp30co2flx25mC1.b1, sgp30co2flx4mC1.b1, sgp30co2flx4mmetC1.b1, sgp30co2flx60mC1.b1


DQRID : D040217.2
Start DateStart TimeEnd DateEnd Time
12/18/2002000002/17/20040000
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:sgp30co2flx60mC1.b1:
  • height of base of instrument tower(site_elevation)
  • h(h)
  • latitude of instrument tower(site_latitude)
  • mean IRGA pressure(mean_p)
  • variance of c(var_c)
  • Date and time in alternate form(yyyydddhhmmss)
  • Virtual temperature (T)(mean_t)
  • mean horizontal wind speed(mean_rot_u)
  • Time offset of tweaks from base_time(time_offset)
  • variance of q(var_q)
  • variance of v(var_rot_v)
  • fractional day of the year(doy)
  • Vertical angle of wind(phi)
  • variance of w(var_rot_w)
  • Monin-Obukhov length scale(Lmoni)
  • variance of u(var_rot_u)
  • Unit Vector Wind Direction(wdir)
  • Friction velocity(ustar)
  • additive WPL LE correction to c flux(fc_wpl_le)
  • additive WPL H correction to c flux(fc_wpl_h)
  • base time(base_time)
  • rotation to zero w(theta)
  • longitude of instrument tower(site_longitude)
  • mean co2 concentration (c)(mean_c)
  • height of instument from tower base(zm)
  • variance of t(var_t)
  • WPL corrected CO2 flux(fc_corr)
  • Water vapor density (q)(mean_q)
  • Latent heat flux(le)
sgp30co2flx4mC1.b1:
  • mean IRGA pressure(mean_p)
  • variance of c(var_c)
  • variance of t(var_t)
  • Latent heat flux(le)
  • mean horizontal wind speed(mean_rot_u)
  • Vertical angle of wind(phi)
  • Monin-Obukhov length scale(Lmoni)
  • variance of q(var_q)
  • height of instument from tower base(zm)
  • longitude of instrument tower(site_longitude)
  • additive WPL LE correction to c flux(fc_wpl_le)
  • Virtual temperature (T)(mean_t)
  • Water vapor density (q)(mean_q)
  • h(h)
  • additive WPL H correction to c flux(fc_wpl_h)
  • Date and time in alternate form(yyyydddhhmmss)
  • Unit Vector Wind Direction(wdir)
  • mean co2 concentration (c)(mean_c)
  • variance of w(var_rot_w)
  • base time(base_time)
  • variance of u(var_rot_u)
  • variance of v(var_rot_v)
  • rotation to zero w(theta)
  • WPL corrected CO2 flux(fc_corr)
  • latitude of instrument tower(site_latitude)
  • Time offset of tweaks from base_time(time_offset)
  • Friction velocity(ustar)
  • height of base of instrument tower(site_elevation)
  • fractional day of the year(doy)
sgp30co2flx25mC1.b1:
  • base time(base_time)
  • Monin-Obukhov length scale(Lmoni)
  • Latent heat flux(le)
  • variance of t(var_t)
  • variance of u(var_rot_u)
  • Date and time in alternate form(yyyydddhhmmss)
  • variance of v(var_rot_v)
  • Vertical angle of wind(phi)
  • Unit Vector Wind Direction(wdir)
  • longitude of instrument tower(site_longitude)
  • latitude of instrument tower(site_latitude)
  • WPL corrected CO2 flux(fc_corr)
  • height of instument from tower base(zm)
  • variance of q(var_q)
  • Friction velocity(ustar)
  • variance of c(var_c)
  • additive WPL LE correction to c flux(fc_wpl_le)
  • mean IRGA pressure(mean_p)
  • variance of w(var_rot_w)
  • Virtual temperature (T)(mean_t)
  • fractional day of the year(doy)
  • mean co2 concentration (c)(mean_c)
  • rotation to zero w(theta)
  • mean horizontal wind speed(mean_rot_u)
  • height of base of instrument tower(site_elevation)
  • h(h)
  • additive WPL H correction to c flux(fc_wpl_h)
  • Water vapor density (q)(mean_q)
  • Time offset of tweaks from base_time(time_offset)
sgp30co2flx4mmetC1.b1:
  • average of four lower soil moisture sensors(mean_m_soil_lower)
  • standard error of mean_t_soil_middle note maximum of two values used in
    calculation(stderr_mean_t_soil_middle)
  • average of two middle soil temperature sensors(mean_t_soil_middle)
  • Time offset of tweaks from base_time(time_offset)
  • h(h)
  • additive WPL H correction to c flux(fc_wpl_h)
  • variance of v(var_rot_v)
  • Hourly precipitation(precip)
  • additive WPL LE correction to c flux(fc_wpl_le)
  • variance of u(var_rot_u)
  • rotation to zero w(theta)
  • standard error of mean_t_soil_lower note maximum of two values used in
    calculation(stderr_mean_t_soil_lower)
  • fractional day of the year(doy)
  • WPL corrected CO2 flux(fc_corr)
  • depth of soil heat flux probes(z_g_soil)
  • height of radiation instruments(zrad)
  • net solar radiation (NR-lite)(r_net)
  • depth of lower m soil probesp(z_m_soil_lower)
  • standard error of mean_m_soil_upper(stderr_mean_m_soil_upper)
  • mean co2 concentration (c)(mean_c)
  • height of lower RH/T sensor(z_lower)
  • Date and time in alternate form(yyyydddhhmmss)
  • Water vapor density (q)(mean_q)
  • variance of c(var_c)
  • depth of middle t soil probesm(z_t_soil_middle)
  • height of instument from tower base(zm)
  • photosynthetic photon flux density (PAR)(ppfd)
  • barometric pressure(bar_pres)
  • upwelling longwave hemispheric irradiance t_rad corrected(r_up_long_hemisp)
  • latitude of instrument tower(site_latitude)
  • mean air temperature, upper level(t_air_upper)
  • average of two lower soil temperature sensors(mean_t_soil_lower)
  • Unit Vector Wind Direction(wdir)
  • standard error of mean_t_soil_upper note maximum of two values used in
    calculation(stderr_mean_t_soil_upper)
  • mean horizontal wind speed(mean_rot_u)
  • Virtual temperature (T)(mean_t)
  • upwelling shortwave hemispheric irradiance t_rad corrected(r_up_short_hemisp)
  • mean relative humidity, lower level(rh_lower)
  • mean air temperature, lower level(t_air_lower)
  • variance of w(var_rot_w)
  • Latent heat flux(le)
  • mean IRGA pressure(mean_p)
  • downwelling shortwave hemispheric irradiance t_rad corrected(r_down_short_hemisp)
  • Friction velocity(ustar)
  • base time(base_time)
  • height of upper RH/T sensor(z_upper)
  • height of base of instrument tower(site_elevation)
  • variance of q(var_q)
  • standard error of mean_g_soil(stderr_mean_g_soil)
  • radiometer body temperature (for longwave correction)(t_rad)
  • longitude of instrument tower(site_longitude)
  • variance of t(var_t)
  • downwelling longwave hemispheric irradiance t_rad corrected(r_down_long_hemisp)
  • average of four upper soil moisture sensors(mean_m_soil_upper)
  • average of up to four soil heat flux sensors(mean_g_soil)
  • total downwelling shortwave radiation (LI-200 sensor)(r_tot)
  • depth of upper t soil probesm(z_t_soil_upper)
  • depth of upper m soil probesm(z_m_soil_upper)
  • Vertical angle of wind(phi)
  • depth of lower t soil probesm(z_t_soil_lower)
  • mean relative humidity, upper level(rh_upper)
  • standard error of mean_m_soil_lower(stderr_mean_m_soil_lower)
  • average of two upper soil temperature sensors(mean_t_soil_upper)
  • Monin-Obukhov length scale(Lmoni)

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DQRID : D041026.1
Start DateStart TimeEnd DateEnd Time
12/18/2002000010/12/20042359
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:sgp30co2flx60mC1.b1:
  • mean co2 concentration (c)(mean_c)
sgp30co2flx4mC1.b1:
  • mean co2 concentration (c)(mean_c)
sgp30co2flx25mC1.b1:
  • mean co2 concentration (c)(mean_c)

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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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