50, 1001
Jose-Luis Jimenez
CIRES, Dept. of Chem. & Biochem. University of Colorado, Boulder
CU AMS
BEACHON-RoMBAS
1, 1
2011, 07, 19, 2012, 12, 21
0
AMS_Starttime,seconds,Mountain Standard Time
16
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
-9999, -9999, -9999, -9999, -9999, -9999, -9999, -9999, -9999, -9999, -9999, -9999, -9999, -9999, -9999, -9999
AMS_Stoptime,seconds,Mountain Standard Time
AMS_MidPointTime,seconds,Mountain Standard Time
Organic_AMS,ug m-3,mass concentration of ambient organic aerosol
Sulfate_AMS,ug m-3,mass concentration of ambient sulfate aerosol
Nitrate_AMS,ug m-3,mass concentration of ambient nitrate aerosol
Ammonium_AMS,ug m-3,mass concentration of ambient ammonium aerosol
Chloride_AMS,ug m-3,mass concentration of ambient chloride aerosol
OrgNO3_AMS,ug m-3,mass concentration of estimated organic nitrate contribution to total nitrate aerosol
InorgNO3_AMS,ug m-3,mass concentration of estimated inorganic nitrate contribution to total nitrate aerosol
O_C_AMS,none,O/C atomic ratio of the organic aerosol
H_C_AMS,none,H/C atomic ratio of the organic aerosol
OM_OC_AMS,none,OM/OC ratio of the organic aerosol
f44_AMS,none,fraction of the total organic signal measured at m/z 44
f43_AMS,none,fraction of the total organic signal measured at m/z 43
f57_AMS,none,fraction of the total organic signal measured at m/z 57
f60_AMS,none,fraction of the total organic signal measured at m/z 60
1
Timestamp is in Mountain Standard Time (UTC-7h)
19
PI_CONTACT_INFO: Address: University of Colorado UCB 216; CIRES Bldg., Boulder, CO 80309-0216
PLATFORM: Ground Site, Rental Trailer #8 Roof
LOCATION: Manitou Experimental Forest near Woodland Park, CO (39.10065 N, 105.10250 W)
ASSOCIATED_DATA: Aerosol Mass Concentrations
INSTRUMENT_INFO: AMS_Type=V; Ionization_type=EI; AMS_SamplingTime: 2.5 min averaging, alternating V and W mode, alternating 5 min ambient and 5 min other; AMS_SamplingCycle: V mode, 3 loops of 4 s closed and 8 s open, followed by 39 s PToF, repeated twice for 150 s; AMS_LensType=standard PM1; AMS_LensPressure=1.4 Torr; AMS_FlowRate=120 ccm; AMS_PrsTempFlowCal: 293K, 574 Torr; AMS_STPConversionFactor=approx. 0.76; AMS_IEOverAB: 2.74143e-13 first ~week, 2.93184e-13 second ~week, 3.10675e-13 (reference) middle third, 3.80888e-13 last third; AMS_Calibrations: every 3 days NH4NO3 Calibration (400 nm), 2 PSL Size calibrations; AMS_RIENH4=3.89 first half, 3.55 second half, in-campaign calibration; AMS_RIESO4=1.35 post-campaign calibration; AMS_CE: 1, by extensive comparison with available data (SMPSs,PAM reactor); AMS_PMCut= 2.5um cyclone on inlet, ~1 um cutoff in lens; AMS_InletRH: < 40% with nafion drier; AMS_LocalToUTCTime: UTC-7h; AMS_RelatedInstrumentInfo: Shared inlet with TSI SMPS and DustTrak.
DATA_INFO: Sub-micron aerosol mass loadings. Units: micrograms per cubic meter at ambient temperature and pressure.
UNCERTAINTY: Accuracy estimate (2sdev): Inorganics 34%, Organics 38%, dominated by uncertainity in the particle collection efficiency due to particle bounce. O/C 31%, H/C 10%, OM/OC 6% (Aiken et al., 2008, ES&T).
ULOD_FLAG: -7777
ULOD_VALUE: N/A
LLOD_FLAG: -8888
LLOD_VALUE: N/A
DM_CONTACT_INFO: Brett B. Palm brett.palm@colorado.edu
PROJECT_INFO: BEACHON-RoMBAS: 19 July - 30 August 2011
STIPULATIONS_ON_USE: Use of these data require prior OK from PI.
OTHER_COMMENTS: V-mode HR data up to m/z 120, with all UMR mass at m/z >120 added to Organic_AMS. Corrections applied to this dataset include basic frag adjustments for water, air, organics, RIE of ammonium, and CE estimation. The IE applied was time-dependent and based on periodic calibrations using dried 400nm NH4NO3 particles. Variations in the airbeam (m/z 28) were used to track the IE between calibrations. AMS alternated measuring 5 min ambient and 5 min of either thermodenuded ambient or PAM-processed air.
REVISION: R2,R1,RF,RE,RA
R2: High-resolution data reported (all previous data was UMR only). First report of organic nitrate and inorganic nitrate (calculated as in Fry et al., 2012, ACPD), O/C, H/C, OM/OC, f44, f43, f57, and f60. Instrument Info updated. 
R1: Data now reported with CE=1 (all previous revisions reported with CE=0.5).  Additional minor QC performed.  RF: Additional notes added, data has not changed from RE. RE: Digitizing error in last data set fixed.  Data has been checked for quality and corrected. RA: Prelim.