Weekend/Weekday Ozone Observations in the South Coast Air Basin

More documents

Recommendations

Info

Carbon Monoxide 4.0 3.0 Mon, 10/2 Wed, 10/4 Sat, 10/7 Sun, 10/8 CO (ppm) 2.0 1.0 0.0 Carryover Inhibition Accumulation Carryover* Freeway Truck Freeway Loops Regional No Trucks Stop** Estimated VOC (ppbC) 600 500 400 Mon, 10/2 Wed, 10/4 Sat, 10/7 Sun, 10/8 VOC (ppbC) 300 200 100 0 Carryover Inhibition Accumulation Carryover* Freeway Truck Freeway Loops Regional No Trucks Stop** Figure 4.3-3b. Average carbon monoxide and volatile organic compounds on freeway loops during carryover, ozone inhibition, and ozone accumulation periods compared to regional sites and source-dominated samples. 4-38
VOC/NOx Ratios 6.0 5.0 4.0 Mon, 10/2 Wed, 10/4 Sat, 10/7 Sun, 10/8 VOC/NOX 3.0 2.0 1.0 0.0 Carryover Inhibition Accumulation Carryover* Freeway Truck Freeway Loops Regional No Trucks Stop** Figure 4.3-4. Average VOC/NOy ratios on freeway loops during carryover, ozone inhibition, and ozone accumulation periods compared to regional sites and source-dominated samples. 4-39
Page 1 and 2:
WEEKEND/WEEKDAY OZONE OBSERVATIONS
Page 3 and 4:
obtained by DRI from the Phase II f
Page 5 and 6:
TABLE OF CONTENTS Preface..........
Page 7 and 8:
Table No. Table 1.4-1 Table 1.4-2 T
Page 9 and 10:
periods by day-of-week at Los Angel
Page 11 and 12:
Figure 1.4-13. Hourly average nitro
Page 13 and 14:
Figure 3.1-2 Mean day-of-the-week v
Page 15 and 16:
Figure 4.4-1b. Mean estimated sourc
Page 17 and 18:
1. STUDY PERSPECTIVE AND SUMMARY Th
Page 19 and 20:
40 percent. Consequently, the contr
Page 21 and 22:
dioxide (NO 2 ) 4 , and carbon mono
Page 23 and 24:
and upwind samples before and after
Page 25 and 26:
where J 1 is the photolysis frequen
Page 27 and 28:
transported from an urban center to
Page 29 and 30:
of the week on Friday and Saturday.
Page 31 and 32:
VOC reactivity, photochemical aging
Page 33 and 34:
corresponding source attributions a
Page 35 and 36:
multiplicative constant. This const
Page 37 and 38:
Table 1.4-1 Trends in Duration and
Page 39 and 40:
Table 1.4-3 Regression Statistics f
Page 41 and 42:
O 3 Ozone Formation Chemistry NO 2
Page 43 and 44:
200 1981-84 200 1995-98 160 160 120
Page 45 and 46:
100 NO 1000 NMHC (estimated from CO
Page 47 and 48:
5 Sunday - Wednesday (1981-84) 10 T
Page 49 and 50:
10.0 8.0 NMHC/NOx 6.0 4.0 2.0 0.0 S
Page 51 and 52:
Ratio of Peak Ozone to Potential Oz
Page 53 and 54:
Nitrogen Oxides at Azusa, 9/30/00 t
Page 55 and 56:
Ambient NOx Associated with CO and
Page 57 and 58:
Source Contribution Estimate (ug/m3
Page 59 and 60:
2.8 2.6 Ozone (ppb) 2.4 log NOx (pp
Page 61 and 62:
2. EVOLUTION OF THE OZONE EFFECT IN
Page 63 and 64:
the SoCAB has dropped sharply as sh
Page 65 and 66:
the duration of ozone accumulation,
Page 67 and 68:
• NO 2 concentrations and NO 2 /N
Page 69 and 70:
Table 2-1 Air Quality Parameters fo
Page 71 and 72:
0.18 Azusa, Summer 1995 12.0 0.15 1
Page 73 and 74:
250 200 150 100 50 0 1976 1977 1978
Page 75 and 76:
80 1981-84 60 40 20 0 80 Sun Mon Tu
Page 77 and 78:
1.00 1981-84 0.80 0.60 0.40 0.20 0.
Page 79 and 80:
160 1981-84 120 80 40 0 160 Sun Mon
Page 81 and 82:
5.0 1981-84 4.0 3.0 2.0 1.0 0.0 5.0
Page 83 and 84:
12.00 1981-84 11.00 10.00 9.00 8.00
Page 85 and 86:
NMHC (ppbC) 1000 800 600 400 200 4-
Page 87 and 88:
10.00 1981-84 8.00 6.00 4.00 2.00 0
Page 89 and 90:
Sunday 1981-84 Time (PDT) 16 15 14
Page 91 and 92:
16 Sunday 1990-94 35 Time (PDT) 15
Page 93 and 94:
40 Sunday O3 Accumulation Rate (ppb
Page 95 and 96:
15.0 1981-84 12.0 9.0 6.0 3.0 0.0 1
Page 97 and 98:
3. CHARACTERIZATION OF THE CURRENT
Page 99 and 100:
3.2 Weekday Differences in Diurnal
Page 101 and 102:
timing hypothesis, which requires a
Page 103 and 104:
through the conversion of NO to NO
Page 105 and 106:
Weekday Differences in Diurnal Vari
Page 107 and 108:
activity including [HNO 3 ]/[H 2 O
Page 109 and 110:
Table 3.2-1 Day-of-the-Week Variati
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Table 3.3-1b Day-of-the-Week Differ
Page 117 and 118:
120 Los Angeles - N. Main - Saturda
Page 119 and 120: 160 140 Upland - Saturdays mean Ozo
Page 121 and 122: maximum 1hour ozone (ppb) 100 90 80
Page 123 and 124: NMHC/NOx ratio 14 12 10 8 6 4 2 0 S
Page 125 and 126: Los Angeles - N. Main Azusa 140 140
Page 127 and 128: Los Angeles - N. Main Azusa 140 140
Page 129 and 130: 2.8 2.6 PAN (ppb) 2.8 2.6 HCHO (ppb
Page 131 and 132: NO2 Photolysis Rate Parameter 0.35
Page 133 and 134: 4. WEEKDAY VARIATIONS IN THE SOURCE
Page 135 and 136: 9 a.m. andnoon. Sampling was conduc
Page 137 and 138: interfaced to an Entech model 7100
Page 139 and 140: values measured at the regional sit
Page 141 and 142: into a category named "UNID." The s
Page 143 and 144: more than a few percent of the tota
Page 145 and 146: period, the amount of NOx associate
Page 147 and 148: weekend/weekday differences during
Page 149 and 150: • Day-of-the-week changes in the
Page 151 and 152: Table 4.4-1 Default Source Composit
Page 153 and 154: Table 4.4-1a Number of observations
Page 155 and 156: Table 4.4-1c Number of observations
Page 157 and 158: Table 4.4-2a Number of observations
Page 159 and 160: Table 4.4-2c Number of observations
Page 161 and 162: Table 4.4-3a CMB Performance Parame
Page 163 and 164: Table 4.4-3c Source Contribution Es
Page 165 and 166: Table 4.5-2 Weekend/Weekday Differe
Page 167 and 168: 800 700 600 Wednesday NO and NOy (p
Page 169: Estimated NOx Estimated NOx (ppb) 5
Page 173 and 174: Nitrogen Oxides at Azusa 80 60 02-0
Page 175 and 176: Nitrogen Oxides at Pico Rivera 180
Page 177 and 178: Nonmethane Organic Gas at Azusa 500
Page 179 and 180: Nonmethane Organic Gas at Pico Rive
Page 181 and 182: NMOG/NOx Ratios at Azusa 20 15 02-0
Page 183 and 184: estimated contribution by source (u
Page 185 and 186: 500 Nonmethane Hydrocarbons 400 NMH
Page 187 and 188: 5 Azusa, Weekdays 6-9 a.m (10/2/00-
Page 189 and 190: 2.0 Azusa, Weekdays 6-9 a.m (10/2/0
Page 191 and 192: Ambient NOx Associated with CO and
Page 197 and 198: Pico Rivera 150 120 BC-Associated C
Page 199 and 200: Nitrogen Oxides 800.00 700.00 600.0
Page 201 and 202: 5. REFERENCES Altshuler, S.L., T.D.
Page 203 and 204: Fujita, E.M., J.G. Watson, J.C. Cho
Page 205 and 206: Roberts, J.M. (1983) Measurements o
show all

Weekend/Weekday Ozone Observations in the South Coast Air Basin

Create successful ePaper yourself

Delete template?

Save as template?