Health effects of exposures to mixtures of air pollutants / Advisory Group on the Medical Aspect of Air Pollution Episodes.

  • Great Britain. Advisory Group on the Medical Aspects of Air Pollution Episodes
Date:
1995
Catalogue details

Licence: Open Government Licence

Credit: Health effects of exposures to mixtures of air pollutants / Advisory Group on the Medical Aspect of Air Pollution Episodes. Source: Wellcome Collection.

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    average 8-hour O, concentration exceeded 50 ppb and a co-located hourly average NO), concentration 2 50 ppb occurred during this 8-hour period, data from the urban network during 1992-1993; b) Diurnal incidence of the hour at which the combined O3/NO, episodes defined in a) above ended; c) Monthly incidence of occasions when the running average 8-hour O, concentration exceeded 50 ppb (an EPAQS ozone exceedence), data from all available sites during 1972-1993; d) Diurnal incidence of the hour at which the ozone episodes defined in c) above ended; ec) Duration of episodes in which EPAQS ozone exceedences occurred, data from all available sites during 1972-1993; f) Annual incidence of EPAQS ozone exceedences in Central London during 1972-1993. Figure 3.7a Figure 3.7b 14 9 [ 8 ” ” so] 8 o. 7 © = £ a 6 5 5 =) ° ° 5 = £ co co 4 r) a) - _ 5 g 3 5 as 2 z = 1 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 0123.45 6 *% 8 9 10111243 1495 16 47:18'19'20 21.2223 Month Hour of ending of 8-hour period (GMT) Figure 3.7c Figure 3.7d 15000 6000 5000 L £ g s 10000 S 4000 | ° ° ro <s i 6 3000 he _ © o Ff: £ = 5000 S 2000; Zz | z 1000 0 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 0123 45 6 7 8 9 1011 1213 14 15 16 17 18 19:20 21 22 23 Month Hour of ending of 8-hour period (GMT) Figure 3.7e ig . 500 — Ob Figure 3.7f @ Years with < 75% data capture % 400 n ® o rs & 300 ® o : 3 3 300 2 fe) x = 2 200 = 200 2) é 8 IS 3 E 100 2 100 Ss 0 , ee Sea a 0 0 20 40 60 80 100 120 140 160 180 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 Number of sequential hours in which an EPAQS exceedence ended Year