Datastream : AOSCCN2COLB

AOS: Cloud Condensation Nuclei Counter (Dual Column), non-ramping mode

Active Dates
2016.04.24 - 2017.02.22

Measurement Categories
Aerosols, Cloud Properties

Originating Instrument
Cloud Condensation Nuclei Particle Counter (CCN)

Measurements

Only measurements considered scientifically relevant are shown below by default.

Show all measurements

Measurement Units Variable
Number concentration of CCN 1/cm^3 N_CCN ( time )
Bin number of lowest channel of OPC include in summation of N_CCN unitless N_CCN_bin_number ( time )
Droplet count by bin size count/s N_CCN_dN ( time, droplet_size )
Sample pressure hPa P_sample ( time )
Volumetric flow rate of sample air cm^3/min Q_sample ( time )
Volumetric flow rate of sheath air cm^3/min Q_sheath ( time )
Temperature read of the optical particle counter degC T_OPC ( time )
Temperature read of sample air at entrance to instrument degC T_inlet ( time )
Nafion temperature degC T_nafion ( time )
Temperature read at top of column degC T_read_TEC1 ( time )
Temperature read at middle of column degC T_read_TEC2 ( time )
Temperature read at bottom of column degC T_read_TEC3 ( time )
Temperature difference between T_read_TEC3 and T_read_TEC1 degC T_read_gradient ( time )
Temperature read of sample air entering the column degC T_sample ( time )
Temperature set point at top of column degC T_set_TEC1 ( time )
Temperature set point at middle of column degC T_set_TEC2 ( time )
Temperature set point at bottom of column degC T_set_TEC3 ( time )
Temperature difference between T_set_TEC3 and T_set_TEC1 degC T_set_gradient ( time )
Altitude above mean sea level m alt
Base time in Epoch seconds since 1970-1-1 0:00:00 0:00 base_time
T_OPC - T_read_TEC3 temperature difference degC dT_OPC ( time )
Estimated target thermal gradient under current operating conditions degC dT_target_estimated ( time )
Size bins for CCN droplet count um droplet_size ( droplet_size )
Droplet bin bounds droplet_size_bounds ( droplet_size, bound )
Eta factor used in calculation of supersaturation_calculated unitless eta ( time )
Lookup table for eta computation unitless eta_lookup_table ( n_lookup, bound )
Eta factor used in calculation of supersaturation_calculated_estimated_equilibrium_target unitless eta_target ( time )
First stage monitor voltage V first_stage_monitor_voltage ( time )
OPC laser current mA laser_current ( time )
North latitude degree_N lat
East longitude degree_E lon
Number of particles that are larger than 10um count overflow ( time )
CCN Proportional valve voltage V proportional_valve_voltage ( time )
Quality check results on field: Number concentration of CCN unitless qc_N_CCN ( time )
Reported temperature difference between T_set_TEC3 and T_set_TEC1 degC reported_temperature_gradient ( time )
Seconds since last supersaturation set point transition s seconds_after_transition ( time )
Sample supersaturation calculated via Lance/Rose method % supersaturation_calculated ( time )
Target supersaturation calculated via Lance/Rose method, computed from eta_target % supersaturation_calculated_target ( time )
Sample supersaturation set point value reported by instrument % supersaturation_set_point ( time )
Logical value, indicating whether the instrument has reached thermal gradient stabilization and is within 0.4 degrees C of the set point unitless temp_unstable ( time )
Standard deviation of (T_read_TEC3 - T_read_TEC1) degC temperature_std ( time )
Time offset from midnight time ( time )
Time offset from base_time time_offset ( time )

Locations

ARM Mobile Facility
ASIM1 Browse DataAscension Island, South Atlantic Ocean; AMF1

Contact(s)

Cynthia Salwen
Brookhaven National Laboratory
associate
631-344-3461
salwen@bnl.gov

Janek Uin
Brookhaven National Laboratory
associate
6313443612
juin@bnl.gov

Gunnar Senum
Brookhaven National Laboratory
(631) 344-3896
gsenum@bnl.gov

Stephen Springston
Brookhaven National Laboratory
(631) 344-4477
srs@bnl.gov

Anne Jefferson
NOAA
(303) 497-6493
anne.jefferson@noaa.gov