DQRID : D141017.6
Start DateStart TimeEnd DateEnd Time
11/30/2012000006/11/20132359
06/12/2013000011/01/20142359
more
Subject:
SGP/CCNPROF/C1 - Reprocess: Incorrect supersaturation stepping method
DataStreams:sgprlccnprof1ghanC1.c1, sgprlccnprof1ghanC1.s1
Description:
The method to handle stepping supersaturation is incorrect - values from different steps 
will be averaged together, the wrong samples will be removed from the average for 
stability reasons, and the resulting data is unusable and meaningless.
Suggestions: 
Do not use data.
Measurements:sgprlccnprof1ghanC1.s1:
  • Second derivative of ambient temperature(temperature_second_deriv)
  • Potential temperature(potential_temperature)
  • The best estimate value of CCN_calc and CCN_ss(be_ccn_ss)
  • Cloud condensation nuclei at supersaturation step 7(ccn_7)
  • Cloud condensation nuclei at supersaturation step 5(ccn_5)
  • Cloud condensation nuclei at supersaturation step 6(ccn_6)
  • Cloud condensation nuclei at supersaturation step 3(ccn_3)
  • Cloud condensation nuclei at supersaturation step 4(ccn_4)
  • Cloud condensation nuclei at supersaturation step 1(ccn_1)
  • Cloud condensation nuclei at supersaturation step 2(ccn_2)
  • Random error in the aerosol extinction coefficient profile(ext_err)
  • Standard Deviation of AOS CCN sample saturation setpoint value reported by
    instrument(CCN_ss_set_std_dev)
  • Standard deviation of relative humidity observed by the Raman lidar over
    averaging period(rh_std_dev)
  • AOS CCN sample saturation setpoint value reported by instrument(CCN_ss_set)
  • Step in supersaturation cycle(ss_step)
  • Water vapor mixing ratio observed by the Raman lidar(water_vapor_mixing_ratio_mean)
  • AOS CCN sample supersaturation calculated by model)(CCN_ss_calc)
  • Standard deviation of aerosol extinction coefficient(ext_std_dev)
  • Air temperature(temperature_mean)
  • Aerosol extinction coefficient that is corrected to dry conditions using
    vertical profile of relative humidity(ext_dry_mean)
  • Relative humidity observed by the Raman lidar(rh_mean)
  • Aerosol extinction coefficient(ext_mean)
  • Height(height)
  • AOS number concentration of CCN at supersaturation step 6(N_CCN_6)
  • AOS number concentration of CCN at supersaturation step 7(N_CCN_7)
  • Coefficients for 2 parameter fit of Bs_B_10um hygroscopic growth as a function
    of RH(fRH_Bs_B_10um_2p)
  • AOS number concentration of CCN at supersaturation step 2(N_CCN_2)
  • AOS number concentration of CCN at supersaturation step 3(N_CCN_3)
  • AOS number concentration of CCN at supersaturation step 4(N_CCN_4)
  • AOS number concentration of CCN at supersaturation step 5(N_CCN_5)
  • Standard deviation of AOS CCN sample supersaturation calculated by model.(CCN_ss_calc_std_dev)
  • AOS number concentration of CCN at supersaturation step 1(N_CCN_1)
  • Average cloud base height used in the retrieval(cbh)
  • Pressure(pressure_mean)
more
sgprlccnprof1ghanC1.c1:
  • AOS number concentration of CCN at supersaturation step 3(N_CCN_3)
  • AOS number concentration of CCN at supersaturation step 2(N_CCN_2)
  • AOS number concentration of CCN at supersaturation step 5(N_CCN_5)
  • AOS number concentration of CCN at supersaturation step 4(N_CCN_4)
  • Second derivative of ambient temperature(temperature_second_deriv)
  • AOS number concentration of CCN at supersaturation step 1(N_CCN_1)
  • AOS CCN sample saturation setpoint value reported by instrument(CCN_ss_set)
  • AOS number concentration of CCN at supersaturation step 7(N_CCN_7)
  • AOS number concentration of CCN at supersaturation step 6(N_CCN_6)
  • Standard Deviation of AOS CCN sample saturation setpoint value reported by
    instrument(CCN_ss_set_std_dev)
  • The best estimate value of CCN_calc and CCN_ss(be_ccn_ss)
  • Height(height)
  • Water vapor mixing ratio observed by the Raman lidar(water_vapor_mixing_ratio_mean)
  • Step in supersaturation cycle(ss_step)
  • Average cloud base height used in the retrieval(cbh)
  • Aerosol extinction coefficient(ext_mean)
  • Standard deviation of AOS CCN sample supersaturation calculated by model.(CCN_ss_calc_std_dev)
  • Coefficients for 2 parameter fit of Bs_B_10um hygroscopic growth as a function
    of RH(fRH_Bs_B_10um_2p)
  • Standard deviation of relative humidity observed by the Raman lidar over
    averaging period(rh_std_dev)
  • Random error in the aerosol extinction coefficient profile(ext_err)
  • Cloud condensation nuclei at supersaturation step 5(ccn_5)
  • Cloud condensation nuclei at supersaturation step 6(ccn_6)
  • Cloud condensation nuclei at supersaturation step 7(ccn_7)
  • Cloud condensation nuclei at supersaturation step 1(ccn_1)
  • Cloud condensation nuclei at supersaturation step 2(ccn_2)
  • Cloud condensation nuclei at supersaturation step 3(ccn_3)
  • Cloud condensation nuclei at supersaturation step 4(ccn_4)
  • Pressure(pressure_mean)
  • Potential temperature(potential_temperature)
  • AOS CCN sample supersaturation calculated by model)(CCN_ss_calc)
  • Air temperature(temperature_mean)
  • Aerosol extinction coefficient that is corrected to dry conditions using
    vertical profile of relative humidity(ext_dry_mean)
  • Relative humidity observed by the Raman lidar(rh_mean)
  • Standard deviation of aerosol extinction coefficient(ext_std_dev)
more

Close this window