Datastream : NOAAAOSCCN100

Aerosol Observing System (AOS): cloud condensation nuclei data

Active Dates
2009.04.16 - 2016.03.31

Measurement Categories
Aerosols, Cloud Properties

Originating Instrument
Cloud Condensation Nuclei Particle Counter (CCN)


Only measurements considered scientifically relevant are shown below by default.

Show all measurements

Measurement Units Variable
AOS CCN sample pressure hPa CCN_P_sample ( 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 degC CCN_T_OPC ( time )
AOS CCN temperature of sample air at entrance to instrument degC CCN_T_inlet ( time )
AOS CCN Nafion temperature degC CCN_T_nafion ( time )
AOS CCN temperature of sample air entering the column degC CCN_T_sample ( time )
First stage monitor voltage V) CCN_first_stage_monitor_voltage ( time )
AOS CCN OPC laser current mA CCN_laser_current ( time )
CCN Proportional valve voltage V CCN_proportional_valve_voltage ( time )
AOS CCN sample saturation setpoint value reported by instrument % CCN_ss_set ( time )
AOS CCN super saturation (calculated) % CCN_super_saturation_calculated ( time )
AOS CCN observed temperature at top of column degC CCN_t_read_TEC1 ( time )
AOS CCN observed temperature at middle of column degC CCN_t_read_TEC2 ( time )
AOS CCN (read) temperature at bottom of column degC CCN_t_read_TEC3 ( time )
Hexadecimal flag, non-zero value means instrument is not operating stably unitless CCN_temp_unstable_flag ( time )
CCN temperature gradient degC CCN_temperature_gradient ( time )
Standard deviation of CCN temperature gradient (CCN_t_read_TEC3 - CCN_t_read_TEC1) degC CCN_temperature_std ( 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 count 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 cell bounds time_bounds ( time, bound )
Time offset from base_time time_offset ( time )


North Slope Alaska
NSAX1 Browse DataExternal Data (satellites and others)
Southern Great Plains
SGPC1 Browse DataCentral Facility, Lamont, OK
ARM Mobile Facility
GRWM1 Browse DataGraciosa Island, Azores, Portugal; AMF1
PGHM1 Browse DataARIES Observatory, Nainital, Uttarkhand, India; AMF1
PVCM1 Browse DataHighland Center, Cape Cod MA; AMF1


Cynthia Salwen
Brookhaven National Laboratory

Janek Uin
Brookhaven National Laboratory

Gunnar Senum
Brookhaven National Laboratory
(631) 344-3896

Stephen Springston
Brookhaven National Laboratory
(631) 344-4477

Anne Jefferson
(303) 497-6493

Elisabeth Andrews
University of Colorado
(303) 497-5171