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|
PEM West B Measurement Characteristics |
|
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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