Table A1a. NOAA WP-3D Aircraft Instrumentation for Gas-Phase Measurements



Species/Parameter	Reference	Technique	Time Resolution, s	Inaccuracy (1 sigma)	Imprecision (1 sigma)
NO	Ryerson et al. [1999]	O3-induced chemiluminescence (CL)	1	5%	0.015 ppbv
NO2	Ryerson et al. [2000]	UV photolysis-CL	1	9%	0.040 ppbv
NOy	Ryerson et al. [1999]	Au converter-CL	1	12%	0.200 ppbv
O3	Ryerson et al. [1998]	NO-induced CL	1	3%	0.050 ppbv
CO	Holloway et al. [2000]	VUV resonance fluorescence	1	5%	0.500 ppbv
CO2	Daube et al. [2002]	NDIR absorption	1	0.08 ppmv	0.110 ppmv
SO2	Ryerson et al. [1998]	Pulsed UV fluorescence	3	10%	0.300 ppbv
C2-C10 NMHCs	Schauffler et al. [1999]	whole air sample/GC-FID	8-30a	5-10%	0.003 ppbv
C1-C2 halocarbons	Schauffler et al. [1999]	whole air sample/GC-MS	8-30a	2-20%	<0.050 ppbv
C1-C5 alkyl nitrates	Schauffler et al. [1999]	whole air sample/GC-MS	8-30a	10-20%	0.0002 ppbv
isoprene, monoterpenes, CH3CN, oxygenates, and aromatics	de Gouw et al. [2003]	Proton transfer reaction mass spectrometry (PTRMS)	17	10-20%	<0.250 ppbv
C2H4	de Gouw et al. [2009]	laser photoacoutic absorption spectroscopy (LPAS)	20	10%	0.700 ppbv
HCHO	Weibring et al. [2007]	Difference frequency generation tunable diode laser absorption	1	13%	0.220 ppbv
PAN, PPN, PiBN, APAN, MPAN, MoPAN	Slusher et al. [2004]	I- chemical ionization mass spectrometry (CIMS)	2	30% (100% for MPAN)	0.020 ppbv
NO3, N2O5	Dubé et al. [2006]	Cavity ring-down spectroscopy (CARDS)	1	20%	0.002 ppbv
NH3	Nowak et al. [2007]	protonated acetone dimer CIMS	1	25%	0.080 ppbv
HNO3	Neuman et al. [2002]	SiF5- CIMS	1	15%	0.100 ppbv
HO2 + RO2	Eisele and Tanner [1993]	NO titration-NO3- CIMS	10	40%	5 x 106 cm-3
H2SO4	Eisele and Tanner [1993]	NO3- CIMS	10	30%	1 x 106 cm-3
UV-VIS actinic flux	Stark et al. [2007]	spectrally resolved radiometry using hemispheric collectors in zenith and nadir	1	15% (30% for jO1D)	
Visible and IR irradiance	Pilewskie et al. [2003]	Solar Spectral Flux Radiometer	1	3-5%	0.2%
H2O		tunable diode laser spectrometry	1	1.0degreeC	0.3degreeC
H2O		chilled mirror hygrometry	1	1.0degreeC	1.0degreeC


aSampling time depends on aircraft altitude.