Generic Guidance and Optimum Model Settings for the CALPUFF ...

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Table A-2 Explanation and Recommendations for the List of Key CALMET Model Options/Continued Option Parameter Recommend value Explanation and Justification Maximum acceptable divergence in the divergence minimization procedure DIVLIM 5 x 10-6 No need to change this default value which has been rigorously tested. Maximum number of iterations in the divergence minimization procedure NITER 50 Recommended default value (50) is normally used. Number of passes in the smoothing NSMTH 2, 4,4,4,… Recommended values are 2 passes in the lowest layer, 4 passes in the higher procedure (NZ) layers. More passes will result in more smoothing of the final wind field. But rarely altered Maximum number of stations used in each layer for the interpolation of data to a grid point NINTR2 99 Normally, recommended default value (99) is used. Critical Froude Number Empirical factor controlling the influence of kinematic effects Multiplicative scaling factor for extrapolation of surface observations to upper layers Barrier Information Number of barriers to interpolation of the wind fields X and Y coordinates of barriers Level (1 to NZ) up to which barriers apply CRITFN 1 Terrain blocking occurs when Froude number < CRITFN. Default value should be used except when justified by data. ALPHA 0.1 Use default FEXTR2 (NZ) NBAR XBBAR, YBBAR, XEBAR YEBAR KBAR NZ x 0.0 Seldom used and not used when IEXTRP = +/- 4 0 (varies) (varies) 56 Usually not used. Use barriers to block out a certain station effects. Barriers can extend from the surface layer to user-defined upper layer limit Used only if NBAR > 0 to define the coordinates of the barrier. Used only if NBAR > 0. User defined switch to control vertical extent of barriers. This requires careful examination of the resulting wind field at each level. Diagnostic Module Data Input Options Surface temperature IDIOPT1 0 Compute the surface temperature internally from hourly surface observations Surface station to use for the surface temperature ISURFT -1 or prognostic model data. DIAG.DAT file is no longer used. Use 2-D spatially varying surface temperatures
Table A-2 Explanation and Recommendations for the List of Key CALMET Model Options/Continued Option Parameter Recommend value Explanation and Justification Diagnostic module domain-averaged lapse IDIOPT2 0 Computed internally using twice daily upper air data or, prognostic fields. rate option DIAG.DAT file is no longer used. Upper air station to use for domain scale lapse rate Depth through which the domain scale lapse rate is computed IUPT -1 Use spatially varying potential temperature lapse rate ZUPT 200m 57 Only used when temperature lapse rate is computed internally from available upper air or gridded prognostic data. Recommended ZUPT value is based on model testing and should not be changed without supporting data. Initial Guess Wind Field IDIOPT3 0 Computed internally from observations and or prognostic winds Upper air station to use for initial guess field (IGF). IUPWND -1 Use 3-D varying initial guess field. Only used if when using observational data to define the IGF (i.e., NOOBS=0). Default means use the 3-D initial guess field. ZUPWND 1 – 1000m Option not used with 3-D IGF. Bottom and top of layer through which the domain-scale winds are computed Observed surface wind components for wind field module IDIOPT4 0 Keep at recommended value. DIAG.DAT file is no longer used. Observed upper air wind components IDIOPT5 0 Keep at recommended value. DIAG.DAT file is no longer used.
Page 1 and 2:
Generic Guidance and Optimum Model
Page 3 and 4:
Contents SCOPE OF WORK AND BACKGROU
Page 5 and 6:
LIST OF FIGURES Page Figure 2-1. Fi
Page 7 and 8:
SCOPE OF WORK AND BACKGROUND A.1 In
Page 9 and 10:
1. INTRODUCTION The CALPUFF modelin
Page 11 and 12: 2.3 Methodologies for Running CALME
Page 13 and 14: hourly profiles of wind speed, wind
Page 15 and 16: Table 2-2. Model Option Switches fo
Page 17 and 18: 2.3.4 Single Station Meteorology It
Page 19 and 20: Note that in no-observations (No-Ob
Page 21 and 22: Table 2-3. Tabulated List of Variou
Page 23 and 24: 3 RECOMMENDED MODEL OPTION SETTINGS
Page 25 and 26: Ridge 1 distance (km) Ridge 2 Figur
Page 27 and 28: Boundary Layer (TIBL) over the land
Page 29 and 30: � algorithms were designed to tre
Page 31 and 32: Figure 3-3. Shows a cross-section o
Page 33 and 34: 3.5.2 Evaluation Studies Figure 3-6
Page 35 and 36: AERMOD BLP 60 70 80 90 95 98 99 Cum
Page 37 and 38: In CALPUFF, by default, a calm peri
Page 39 and 40: UTM Y Coordinate (km) - WGS84 6474.
Page 41 and 42: It is important to note that no eva
Page 43 and 44: 6474.5 6474 6473.5 6473 6472.5 6472
Page 45 and 46: sigma v (CALPUFF calculated) Figure
Page 47 and 48: 4. DISCUSSION ON THE APPROPRIATE PR
Page 49 and 50: 4.3.1 Graphical Evaluation Graphica
Page 51 and 52: (uncorrelated). A line of best fit,
Page 53 and 54: 4.3.3 Other Meteorological Evaluati
Page 55 and 56: Schulman, L.L. and J.S. Scire, 1980
Page 57 and 58: Table A-1. An Explanation of the 7
Page 59 and 60: Table A-1 An Explanation of the 7 C
Page 61: Table A-2 Explanation and Recommend
Page 65 and 66: Table A-3 Explanation and Recommend
Page 67 and 68: Table A-4. Explanation and Recommen
Page 69: Table A-4 Explanation and Recommend
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