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PEM West B Measurement Characteristics

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Species/
Parameter
Investigator Technique Averageing Time Accuracy Nominal Precision Nominal Lod(pptv)
NOa J. Bradshaw and
S. SandHolm
LIF 1 s
10 s
100 s
± 18%
± 18%
± 18%
22% @ 100 pptv
7% @ 100 pptv
2% @ 100 pptv
20
2
0.4
NOyb J. Bradshaw and
S. SandHolm
CC/LIF 30 s ± 20% 20% @ 200 pptv 36
NO Y. Kondo Chemi Lum 10 s 12% @ 50 pptv 7 pptv 7
NOy Y. Kondo CC/Chemi Lum 10 s 13% @ 500 pptv 15 pptv 14
O3 G. Gregory Chemi Lum 5 s 3% or 2 ppbv 2% or 1 ppbf 1 ppbv
CO G.Sachse TDL 5 s 1% 1 ppbv or 1% NA
CO2 B. Anderson IR absorption 5 s ± 0.25 ppm ± 0.1 ppm NA
N2O G.Sachse TDL 5 s 1% 0.5 ppbv NA
CH4 G.Sachse TDL 5 s 1% 3 ppbv NA
Remote O3 E. Browell UV DIAL 300 sc 10% or 2 ppbv 5% or 1 ppbv < 5 ppbv
Remote aerosol profile E. Browell UV DIAL (visible) 1.8 sd 1% 1% NA
H2O J. Barrick Cryogenic chilled mirror hygro 10 s ± 0.5 ° C ± 0.2 NA
H2O2 B. Heikes Grab samples/HPLC 2.5 min 10% > 50 pptv 15 pptv 12
CH3OOH B. Heikes Grab samples/HPLC 2.5 min 15% > 50 pptv 20 pptv 12
Condensation nuclei(CN) B. Anderson Butanol CN counter 5s 10% 5% 1/cm3
Aerosol size (0.12-3.12 m) R. Pueschel Optical perticle counter 15s 10% 5% 0.1/cm3
DMS A. Bandy and
D. Thornton
GC/QMS 3-4 min < 10% < 2 1
SO2 A. Bandy and
D. Thornton
GC/QMS 3-4 min < 10% < 2 2
PAN H. Singh GC/ECD 150 s ± 20% ± 10% 1
PPN H. Singh GC/ECD 150 s ± 25% ± 10% 1
C2Cl4 H. Singh GC/ECD 150 s ± 15% ± 10%/1pptv 0.5
CH3COCH3 H. Singh GC/ECD 130 s ± 20% ± 10% 10
CH3OH H. Singh GC/ECD 130 s ± 20% ± 10% 10
C2H5OH H. Singh GC/ECD 130 s ± 25% ± 10% 10
HNO3 R. Talbot Acqueous scrub./IC 4-8 min 35% 25% 5
HCOOH R. Talbot Acqueous scrub./IC 4-8 min 20% 15% 10
CH3COOH R. Talbot Acqueous scrub./IC 4-8 min 25% 18% 15
Chloride R. Talbot Filter/IC 10-20 min 40% 35% 50
Nitrate R. Talbot Filter/IC 10-20 min 20% 10% 5.0
Oxalate R. Talbot Filter/IC 10-20 min 20% 15% 2.0
Phosphate R. Talbot Filter/IC 10-20 min 25% 25% 5.0
Sulfate R. Talbot Filter/IC 10-20 min 10% 10% 3.5
Methylsulfonate R. Talbot Filter/IC 10-20 min 15% 15% 1.0
Ammonium R. Talbot Filter/IC 10-20 min 15% 15% 20
Sodium R. Talbot Filter/IC 10-20 min 40% 35% 60
Potassium R. Talbot Filter/IC 10-20 min 20% 20% 25
Magnesium R. Talbot Filter/IC 10-20 min 10% 10% 2.5
Calcium R. Talbot Filter/IC 10-20 min 15 15% 20
Be-7 R. Talbot Filter/gama spectroscopy 15-30 min 15 15% 50 fCi/scm
Pb-210 R. Talbot Filter/alpha spectroscopy 15-30 min 10 10% 0.1 fCi/scm
CFC-12 S. Rowland and
D. Blake
Grab sample/GG 15-75 s 2 0.7% 0.1
CFC-11 S. Rowland and
D. Blake
Grab sample/GG 15-75 s 2 0.8% 3
CFC-113 S. Rowland and
D. Blake
Grab sample/GG 15-75 s 2 1.4% 3
CFC-114 S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 1.5% 1
HCFC-22 S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 1.5% 10
H-1301 S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 2% 0.1
H-1211 S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 2% 0.1
CH3Cl S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 1.2% 100
CH3Br S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 4% 1
CH3I S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% 0.05
CH3CCl3 S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 1% 3
CH2Cl2 S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 5% 2
C2HCl3 S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% 0.01
CCl4 S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 1% 3
C2Cl4 S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 1.5% 0.05
Ethane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 1% / 2 pptv 3
Ethene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 3 pptv 3
Propane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 1% / 2 pptv 3
Propene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 3 pptv 3
i_butane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 1% / 2 pptv 3
n_butane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 1% / 2 pptv 3
Ethyne S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 1% / 2 pptv 3
1_butene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 3% / 3 pptv 3
I_pentane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 1% / 2 pptv 5
n_pentane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 1% / 2 pptv 5
1_pentene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 3% / 3 pptv 3
n_hexane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 5 1% / 2 pptv 3
Isoprene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 3% / 3 pptv 3
Benzene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
Toluene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
t-2-Butene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
c-2-Butene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
1,3-Butadiene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
1-Butyne S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
2-Butyne S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
n-Pentane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
i-Pentane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
Cyclopentane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
2-Methylpentane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
Methylcyclopentane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
3-Methylpentane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
Cyclohexane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
Cyclohexene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
n-Heptane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
2,4-Dimethylpentane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
Methylcylohexane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
Methylcylohexene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
2,3,4-Trimethylpentane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
2,2,4-Trimethylpentane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
Ethylbenzene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
p-Xylene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
m-Xylene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
o-Xylene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
n-Nonane S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
p-Cymene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
1,2,4-Trimethylbenzene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
1,3,5-Trimethylbenzene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
Propylbenzene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
(-) a-Pinene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
(+) a-Pinene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
b-Penene,9 S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
d-Limonene S. Rowland and
D. Blake
Grab sample/GG 15-75 s 10 5% / 3 pptv 3
UV Radiation / zenith and nadir J. Barrick Eppley radiometer 1 s ± 5% ± 2% NA
Aircraft ephemeris data DC-8 aircraft DC-8 aircraft 1 s 10 s NA NA
J(NO2) zenith and nadir J. Barrick Hemispherical radiometer 1 s ± 5% ± 1% NA
Surface temperature DC-8 aircraft PRT-5 1 s ± 0.5 °C ± 0.2°C -65° C to +55° C
Dew point DC-8 aircraft 2 and 3 stage frost pt hygro 1 - 30 s ± 1.0° C ± 0.3° C -75°C to +75°C
a NO measurements archived for 1, 10, and 100's integration times
b Investigators have included comments files in the archives stating that their NOy values also reflect artifacts associated with conversion of nonreactive nitrogen compounds.
c Vertical averaging interval equal to 300 m (nadir) and 600 m (zenith); horizontal averaging equla to 30 s or ~170 km.
d Vertiacal sampling interval equal to 60 m; horizontal sampling interval equal to 1.8 s or ~4 km
e For total partical cound >100 particles in 10 s.

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