Datastream : AOSCCN

Aerosol Observing System (AOS): cloud condensation nuclei data

Active Dates
2005.03.04 - 2011.08.30

Measurement Categories
Aerosols, Cloud Properties

Originating Instrument
Aerosol Observing System (AOS)


Only measurements considered scientifically relevant are shown below by default.

Show all measurements

Measurement Units Variable
First stage monitor voltage V (DC) CCN_FirstStageMonitorVoltage ( time )
AOS CCN sample pressure hPa CCN_P_sample ( time )
CCN Proportional valve voltage V CCN_ProportionalValveVoltage ( time )
AOS CCN volumetric flowrate of sample air cm^3/minute CCN_Q_sample ( time )
AOS CCN volumetric flowrate of sheath air cm^3/minute CCN_Q_sheath ( time )
AOS CCN temperature of the optical particle counter C CCN_T_OPC ( time )
AOS CCN temperature at top of column C CCN_T_TEC1 ( time )
AOS CCN temperature at middle of column degrees C CCN_T_TEC2 ( time )
AOS CCN temperature at bottom of column degrees C CCN_T_TEC3 ( time )
AOS CCN temperature of sample air at entrance to instrument degrees C CCN_T_inlet ( time )
AOS CCN temperature of the nafion humidifier degrees C CCN_T_nafion ( time )
AOS CCN temperature of sample air entering the column degrees C CCN_T_sample ( time )
CCN temperature gradient C CCN_Temperature_Gradient ( time )
Size of upper limit of each CCN bin um CCN_UpperSizeLimit ( num_bins )
AOS CCN standard deviation of difference (CCN_T_TEC1 - CCN_T_TEC3) degrees C CCN_dT_TEC3_TEC1_StdDev ( time )
AOS CCN OPC laser current mA CCN_laser_current ( time )
AOS CCN sample supersaturation calculated by model) % CCN_ss_calc ( time )
AOS CCN sample saturation setpoint value reported by instrument % CCN_ss_set ( time )
Hexadecimal flag, non-zero value means instrument is not operating stably unitless CCN_temp_unstable_flag ( time )
AOS number concentration of CCN 1/cm^3 N_CCN ( time )
AOS bin number of lowest channel of OPC include in summation of N_CCN unitless N_CCN_bin_number ( time )
AOS CCN number concentration by bin unitless N_CCN_dN ( time, num_bins )
Altitude above mean sea level m alt
Base time in Epoch seconds since 1970-1-1 0:00:00 0:00 base_time
North latitude degree_N lat
East longitude degree_E lon
Time offset from midnight time ( time )
Time offset from base_time time_offset ( time )


North Slope Alaska
NSAX1 Browse DataExternal Data (satellites and others) retired
Southern Great Plains
SGPC1 Browse DataCentral Facility, Lamont, OK retired
ARM Mobile Facility
FKBM1 Browse DataBlack Forest, Germany retired
GRWM1 Browse DataGraciosa Island, Azores, Portugal; AMF1 retired
HFEM1 Browse DataShouxian, Anhui, China retired
NIMM1 Browse DataNiamey, Niger retired
PYEM1 Browse DataPoint Reyes, CA retired
 retired = Originating instrument has been retired at this location