Table 1. Tropospheric Ozone Budget Summaries for IONS-04 Soundings (1 July to 13 August 2004) at NENA Locationsa

IONS-04	Belts	WFF	Narr	RHB	Yarm	Sable
O3 (to 15 km), DU	58.2	49.6	57.2	60.6	52.8	47.5
O3 (to OTP),b DU	47.1	47.5	44.7	45.6	45.4	40.7
OTP, km	12.1	13.8	12.2	12.5	12.6	14.8
ST O3,c DU	12.6	13.0	10.5	8.3	13.6	8.9
ST O3, fraction	0.27	0.27	0.27	0.19	0.30	0.22
RCL O3,c DU	4.7	7.0	3.6	3.7	4.4	5.6
RCL O3, fraction	0.10	0.15	0.08	0.08	0.10	0.14
AD O3, fraction	0.53	0.49	0.55	0.65	0.52	0.58
BL (surface to 1.0 km), DU	5.0	4.4	4.4	3.6	3.8	2.6
BL (1.0 km fraction to OTP)	0.11	0.09	0.10	0.08	0.08	0.06
Surface O3 (0-100 m),d ppbv	66	47	46	30	35	25

aWFF, Wallops.
bOTP, ozonopause, which is close to mean thermal tropopause [Thompson et al., 2007a].
cDetailed descriptions of derivation of ST and RCL O3 given by Thompson et al. [2007a].
dRefer to Thompson et al. [2007a] for discussion of surface O3 and for statistics of major U.S. cities between Washington and Boston in 2004.