Central California Ozone Study (CCOS) - Desert Research Institute

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Sun Direct solar radiation Scatterd sky radiation Flat Plate Radiometer The irradiance has a response factor of cos(θ) while the spherically integrated actinic flux does not. It is possible make estimates of spherically integrated actinic flux from irradiance measurements but the uncertainties may be at least ±40%. A complete discussion of the differences between actinic flux and irradiance is given in Madronich (1987). Another difficulty in calculating photolysis rate parameters is that the wavelength dependent response of radiometer for the measurement of UVB and global solar radiation do not match the product (action spectrum) of any particular species’ absorption cross sections (σλ) and quantum yields (φλ). For example a typical UVB radiometer response function is similar but not identical to the action spectrum of ozone, Response (arbitrary units) 0.6 0.5 0.4 0.3 0.2 0.1 0.0 Figure 3. 250 275 300 325 350 Wavelength (nm) Figure 3. The response function of a Yankee brand UVB radiometer in arbitrary units as a function of wavelength. The UVB radiometers can be used to provide an estimate of the photolysis rates of ozone to produce excited oxygen atoms, O(1D), and a small fraction of these react to produce HO radicals. Global solar radiometers react to a broader spectrum of radiation at higher wavelengths; their response function is more like the action spectrum of NO2. For these reasons we propose to take advantage of existing networks of UVB and solar radiation measurements and to augment these with our own spectrally resolved actinic flux measurements. C-18
A sample of solar radiance data including global solar radiation and UVB radiation measurements is given in Figure 4. Figure 4. Solar irradiance measurements from Hanford, CA, from the NOAA monitoring program described below. C-19
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Central California Ozone Study (CCO
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CCOS Field Operations Plan Version
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CCOS Field Operations Plan (DRAFT)
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Page 143 and 144: CCOS Field Operations Plan Version
Page 167 and 168: Appendix A CCOS Contact List (a) Re
Page 170 and 171: APPENDIX B Air Quality Monitoring S
Page 172 and 173: APPENDIX B (continued) Air Quality
Page 174 and 175: APPENDIX B (continued) Air Quality
Page 177 and 178: C. MEASUREMENT METHODS Field monito
Page 179 and 180: these sensors are sufficiently good
Page 181 and 182: the position of the balloon with re
Page 183 and 184: The ozone/ethylene chemiluminescenc
Page 185 and 186: C.5 Supplemental Measurements of Ox
Page 187 and 188: from the collection surface without
Page 189 and 190: hydrocarbons takes place. No Perma-
Page 191 and 192: Tenax samples are usually analyzed
Page 193: λ 2 j = ∫ F λ ×σ λ × φ λ
Page 197 and 198: TABLE OF CONTENTS S0 Sites S1 Sites
Page 199 and 200: Lambie Road (S0) Address: Location:
Page 201 and 202: Sloughhouse (S0) Address: Fire Stat
Page 203 and 204: San Martin (S0) Address: San Martin
Page 205 and 206: Kettleman City (S0) Address: Locati
Page 207 and 208: McKittrick (S0) Address: Location:
Page 209 and 210: Red Hills (East County Monitoring S
Page 211 and 212: Sutter Butte (S1) Address: Location
Page 213 and 214: White Cloud (S1) Address: 26533 Sta
Page 215 and 216: Bodega Bay (S1) Address: Location:
Page 217 and 218: San Leandro Address: Location: Coor
Page 219 and 220: . Summary of Responsibilities: Equi
Page 221 and 222: New Facilities: One phone line for
Page 223 and 224: New Facilities: None Summary of Res
Page 225 and 226: Turlock Existing Equipment: Observa
Page 227 and 228: Summary of Responsibilities: Equipm
Page 229 and 230: C 2 - C 12 HC from canisters HC Can
Page 231 and 232: Coefficient of Haze RAC Gas Calibra
Page 233 and 234: New Facilities: Small trailer, powe
Page 235 and 236: Observable Instrument Installer O 3
Page 237 and 238: New Facilities: 8’ x 10’ traile
Page 239 and 240: Observable Instrument Installer NO/
Page 241 and 242: Existing Monitoring Equipment (vend
Page 243 and 244: C 8 - C 20 HC from TENAX DRI Multi-
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Parlier Existing Equipment: Observa
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Camp Roberts (Other) Address: Locat
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Appendix D-2 Supplemental Air Quali
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Bella Vista Bella Vista Water Distr
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South View from Front Gate Southwes
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San Martin San Martin Shelter with
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South View Southwest View West View
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Sutter Butte
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San Leandro
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Bruceville
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west view northwest view
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South View West View
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South View West View
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Pacheco Pass Pacheco Pass Site Nort
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Arvin North View Northeast View Eas
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Sunol Sunol Site, North View East V
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Southwest View West View
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Parlier Instrument Shelter North Vi
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Shasta Lake North View East View So
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Central California Ozone Study (CCOS) - Desert Research Institute

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