Volume 1 - The Atmospheric Studies Group at TRC
Volume 1 - The Atmospheric Studies Group at TRC Volume 1 - The Atmospheric Studies Group at TRC
Figure 4-1. Geophysical properties of the site of the 1981/1982 Cameron, Louisiana tracer experiment, as gridded for use in the CALMET/CALPUFF simulations. The grid cell size is 200m. Tracer concentrations were measured at the indicated sampler locations. Tracer release locations indicate boat positions used on 2/15/1982 and 2/24/1982, and Platform 28A used for all other periods. Final Report Vol.1 28
All sampler locations are used as receptors, but additional ones are added to increase the density of receptor spacing along the shoreline. Intermediate receptors are placed at approximately 50m intervals, with elevations interpolated from the actual sampler elevations. In this case, all elevations are 1.5m MSL. A total of 380 receptors are used in the CALPUFF modeling. Meteorological Processing Meteorological data files for applying CALMET/CALPUFF to the Cameron study are developed primarily from files used to run OCD4. The “release” meteorology identified for OCD4 is used to construct representative SEA.DAT (over water) and SURF.DAT (over land) input files for CALMET. Cloud observations made at the Cameron shoreline during the study are included in the SURF.DAT file. The SEA.DAT station is placed at Platform 28A, while the SURF.DAT station is placed onshore at (480, 3295). The original OCD4 evaluation files indicate that air temperature and wind speed are measured at 18m for all of the hours. This is true most of the time, but there are periods when data from 10m at the shoreline mast are substituted for the 18m data at Platform 28A. This occurs on: Temperature at 10m 7/**/1981 all hours (platform did not measure air temperature in July) 2/15/1982 all hours 2/17/1982 1300-1400 2/23/1982 1000-1100 Wind Speed at 10m 7/20/1981 all hours 2/15/1982 all hours 2/17/1982 1300-1400 The anemometer height associated with the SURF.DAT wind data during these periods is set to 10m. Because CALMET accepts a single measurement height for the speed and temperature in the SEA.DAT file, that height is reset to 10m whenever the temperature measurement height is 10m. Wind speed is profiled from the actual anemometer height to the temperature measurement height when these are different. Boundary layer parameters computed by OCD are used with Monin-Obukhov similarity profiles to compute the wind speed adjustment. Wind directions used in the OCD4 datasets are those that align the source and the sampler with the peak concentration each hour. This allows the evaluation to focus Final Report Vol.1 29
- Page 1 and 2: Development of the Next Generation
- Page 3 and 4: 1. INTRODUCTION The purpose of this
- Page 5 and 6: • Prognostic Meteorological Model
- Page 7 and 8: o 1: Maul (1980)-Carson (1973) o 2:
- Page 9 and 10: into 50 tiles (90 RUC grid-points/t
- Page 11 and 12: y H ( 1− 34.15z / L) 1/ 3 = (3-9)
- Page 13 and 14: During execution, the bulk algorith
- Page 15 and 16: Anemometer Height Adjustment for La
- Page 17 and 18: T (ºK) g (m/s 2 ) temperature grav
- Page 19 and 20: adjusted to account for the effect
- Page 21 and 22: Two methods of supplying the timesc
- Page 23 and 24: cell is the cell that determines th
- Page 25 and 26: June 4 (1130-1230 CET) L. Turbulenc
- Page 27 and 28: 4. MODEL PERFORMANCE EVALUATION 4.1
- Page 29: The CALMET preprocessors TERREL, CT
- Page 33 and 34: Table 4-2b Over-water Meteorologica
- Page 35 and 36: Meteorological data used in the OCD
- Page 37 and 38: . . CARPINTERIA, CA 3814 . UTM Nort
- Page 39 and 40: Year Month Day Table 4-4 Over-water
- Page 41 and 42: Datum: NAS-C (North American 1927)
- Page 43 and 44: Table 4-5 Source Characterization f
- Page 45 and 46: Table 4-6a Over-water Meteorologica
- Page 47 and 48: Geophysical Processing Gridded land
- Page 49 and 50: Table 4-7 Source Characterization f
- Page 51 and 52: tape format called GF-3. These data
- Page 53 and 54: . . Strait of Oresund 6230 6220 UTM
- Page 55 and 56: . . Strait of Oresund 6230 6220 UTM
- Page 57 and 58: Table 4-10 SEA.DAT Meteorological D
- Page 59 and 60: the numbers refer to ICOARE values,
- Page 61 and 62: that are simulated during the one-h
- Page 63 and 64: 4.3 Evaluation Results Cameron, Car
- Page 65 and 66: improve model performance relative
- Page 67 and 68: Figure 4-7. Graphical depiction of
- Page 69 and 70: Figure 4-8. Graphical depiction of
- Page 71 and 72: Figure 4-9. Graphical depiction of
- Page 73 and 74: Figure 4-10. Graphical depiction of
- Page 75 and 76: Table 4-15 Performance Statistics f
- Page 77 and 78: Performance of CALPUFF Configuratio
- Page 79 and 80: Table 4-16 Performance Statistics f
Figure 4-1. Geophysical properties of the site of the 1981/1982 Cameron, Louisiana tracer experiment, as<br />
gridded for use in the CALMET/CALPUFF simul<strong>at</strong>ions. <strong>The</strong> grid cell size is 200m. Tracer concentr<strong>at</strong>ions<br />
were measured <strong>at</strong> the indic<strong>at</strong>ed sampler loc<strong>at</strong>ions. Tracer release loc<strong>at</strong>ions indic<strong>at</strong>e bo<strong>at</strong> positions used on<br />
2/15/1982 and 2/24/1982, and Pl<strong>at</strong>form 28A used for all other periods.<br />
Final Report Vol.1 28
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