SGP/CO2FLX/C1 - Reprocessing User Notes

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.

• time_offset
• Mean horizontal wind speed(mean_rot_u)
• Additive WPL H correction to c flux(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 speed, W-to-E component, at altitude, derived from ETA model(wdir)
• Variance of v(var_rot_v)
• Variance of rotated u(var_rot_u)
• phi
• site_longitude
• Variance of rotated w(var_rot_w)
• Variance of q(var_q)
• site_elevation
• zm
• Additive WPL LE correction to fc(fc_wpl_le)
• WPL corrected CO2 flux(fc_corr)
• Variance of c(var_c)

SGP/CO2FLX/C1 - Reprocess: Units

Mean CO2 density units are incorrectly labeled as umol m-3. Units should be labeled as 
mmol m-3.

• Mean CO2 density(mean_c)

SGP/CO2FLX/C1 - Mean CO2 density incorrect, CO2 flux suspect

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.

• Mean CO2 density(mean_c)
• WPL corrected CO2 flux(fc_corr)

SGP/CO2FLX/C1 - Disturbance around site

A bulldozer used to excavate the SGP Tower anchors was right around (within 10 feet) our 
systems.

• Mean CO2 density(mean_c)
• WPL corrected CO2 flux(fc_corr)