Using Measured Mixing Heights
If measured mixing heights are available, then they are treated in the following manner: If L>0 (SBL) the measured mixing height is defined as zie and it is treated the same as a calculated mechanical mixing height (smoothing, etc). If L<0 (CBL) the measured mixing height is defined as zic , and zie is calculated from eq.(12) then proceed as if both zic and zim had been calculated values.
If a user has “measured” mixing heights available (and chooses to use them), the model defaults to substituting calculated mixing heights for missing measurements and a message is written that a substitution has occurred. If the user elects to substitute calculations for missing measurements, the model will print out a message to the message file for each hour that a substitution has occurred.
8 APPENDIX: Input / Output Needs and Data Usage
8.1
AERMET Input Data Needs
8.1.1
METEOROLOGY
8.1.2
DIRECTIONALLY AND/OR MONTHLY VARYING SURFACE
CHARACTERISTICS
8.1.3
OTHER
8.1.4
OPTIONAL
8.2
Estimation of solar insolation for small solar elevation angles
8.3
Selection and Use of Measured Winds,
Temperature and Turbulence in AERMET
8.3.1
THRESHOLD WIND SPEED
8.3.2
REFERENCE TEMPERATURE AND HEIGHT
8.3.3
REFERENCE WIND SPEED AND HEIGHT
8.3.4
CALCULATING THE POTENTIAL TEMPERATURE GRADIENT
ABOVE THE
MIXING HEIGHT FROM SOUNDING DATA
8.3.5
MEASURED TURBULENCE
8.3.6
DATA SUBSTITUTION FOR MISSING ON-SITE DATA
8.4
Information Passed by AERMET to AERMOD
8.5
Restrictions on the Growth of PBL Height
8.6
Initializing the Mechanical Mixing Height Smoothing Procedure
8.7
Determining The Mixing Height When the Sounding Is Too Shallow
8.8
Input Data Needs for AERMAP
8.9
Information Passed by AERMAP to AERMOD
8.10
Wind Speed & Turbulence Limits Used in Model Calculations
8.11
Using Profiles for Interpolating Between Observations
8.12
Using Measured Mixing Heights
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