Angel curve

Fig. 2-3. Grand average number (N), surface area (S), and volume (V) distribution of Los Angeles smog. The linear ordinate normalized by total number (NT), area (ST), or volume (VT) is used so that the apparent area under the curves is proportional to the quantity in that size range. Source Corn, M., Properties of non-viable particles in the air. In "Air Pollution," 3rd ed., Vol. I ( A. C. Stern, ed.). Academic Press, New York, 1976, p. 123.

Louis curve for June 1966 is broader than that for Los Angeles in August. This is explained by differences in sunlight intensity distribution throughout the day. 

Pollutants emitted by various sources entered an air parcel moving with the wind in the model proposed by Eschenroeder and Martinez. Finite-difference solutions to the species-mass-balance equations described the pollutant chemical kinetics and the upward spread through a series of vertical cells. The initial chemical mechanism consisted of 7 species participating in 13 reactions based on sm< -chamber observations. Atmospheric dispersion data from the literature were introduced to provide vertical-diffusion coefficients. Initial validity tests were conducted for a static air mass over central Los Angeles on October 23, 1968, and during an episode late in 1%8 while a special mobile laboratory was set up by Scott Research Laboratories. Curves were plotted to illustrate sensitivity to rate and emission values, and the feasibility of this prediction technique was demonstrated. Some problems of the future were ultimately identified by this work, and the method developed has been applied to several environmental impact studies (see, for example, Wayne et al. ). 

Figure 2.24 The C-curve obtained form the method shown in Figure 2.22 (After Angell, 1988).

In the Angel Field (Angel-2), bulk density can be as high as 2.6 g/cm in dolomite-cemented sandstone intervals, compared with 2.35 g/cm in sandstones without significant dolomite cement (Fig. 17). Examination of resistivity character shows that the MSFL, LLS and LLD curves each... 

Fig. 17. Wireline log characteristics, smoothed acoustic impedance curve and 3D seismic response over the Upper Angel Formation at Angel-2. Note that the major dolomite-cemented zones (black bars) are identifiable on the basis of neutron, density, resistivity and sonic log profiles. The zones appear as discrete layers at this location, with a cumulative thickness of 164 m, and are not fully cemented but contain some residual porosity. The dolomite-cemented zones occur both above and below the gas-water contact (GWC). The smoothed acoustic impedance curve shows that the zones produce a visible seismic response which is mappable. For an example of a line through the 3D seismic volume see Ryan-Grigor Schulz-Rojahn (1995 their Fig. 10a,b).

Curves 5-8 are based on the data of Del Angel et al. (282). For the hydrogenolysis of cyclopentane, Rh/Al203 is structure sensitive and Pd/Al203 is essentially structure insensitive. For the hydrogenolysis of methylcyclopentane, Rh/Al203, as already mentioned, gives the unusual result shown by curve 8, which is difficult to explain. Note also the point... 

---