1. General Model Information

Name: Boundary LAYER model

Acronym: BLAYER

Main medium: air
Main subject: biogeochemistry, agriculture
Organization level: landscape
Type of model: partial differential equations (finite differences,3D)
Main application:
Keywords: Atmospheric boundary layer, hydrostatic, anelastic, incompressible,3-dimensional, wind forecasts, insect pest migrations, GIS


Dr. Richard Turner
Department of Geological and Atmospheric Sciences
Room 3010 Agronomy Hall
Iowa State University
Ames, IA 50011
Telephone: 515-294-5587
Fax: 515-294-3163
email: rwturner@iastate.edu


Paegle and McLawhorn, University of Utah. Astling, University of Utah. MikeMcCorcle, J. Fast, R. Turner, Iowa State have modified the model.


The BLAYER model simulates atmospheric flows within the lowest few kilometers of the earth's atmosphere. The model is used to describe diurnal variations in temperature and wind fields and has been adapted to forecast the timing and location of insect pest migrations into the United States cornbelt. The model uses a 5-10 minute time step and is generally run for 1-3 day time intervals.

The model uses soil texture and moisture information, fields of atmospheric variables and DEM data as input. It has been used to examine cutworm dispersion in the cornbelt. The model provides output in ASCII format and data for a grid. Output includes: temperature, wind vectors, pressure, soil moisture, soil temperature, turbulent energy and insect concentrations at any time interval.

Author of the abstract:


Validation Procedures: Comparison of modeled wind, humidity fields with observed data. Correlations of forecast rising motion associated with convergence at nose of jet with convective development. STORMFEST-stormscale operational and research field experiment. Comparison of Black Cutworm trap data with forecast concentration fields.

II. Technical Information

II.1 Executables:

Operating System(s): DEC workstation environment

II.2 Source-code:

Programming Language(s): FORTRAN 77

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

IV. References

Paegle and McLawhorn, 1983: "Correlation of nocturnal thunderstormsand boundary-layer convergence". Monthly Weather Review. 101: 877-933. McCorcle, 1988:Simulation of surface moisture effects on on the Great Plains low-level jet". Monthly WeatherReview. 116: 1705-1720.

V. Further information in the World-Wide-Web

VI. Additional remarks

This model could be useful for the study of short-term atmosphericdynamics and possible changes that may occur in this area of the atmosphere asa result of climate change. It may be of particular importance to the study ofpest migration and the potential changes in dispersal patterns of crop damagingpests brought on by changes in climatic conditions. Because the output is ina spatial format (e.g. grid pattern), the output of the model may be broughtinto a GIS for further spatial analyses.

Last review of this document by: T. Gabele: 16. 6. 1997 -
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:39 CEST 2002

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