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Software/Support for Processing Meteorological Data for CALPUFF

About CALPUFF Meteorological Data

The CALPUFF modeling system utilizes meteorological data from a prognostic meteorological model that necessitates more expertise and greater processing resources than models such as ISCST3 or AERMOD. For these analyses, modelers typically use MM4 meteorological data that was measured in 1990 and has 80-kilometer resolution. BREEZE meteorologists use MM5 data measured in 1996 that has a resolution of 36 kilometers. The tighter resolution better accounts for meteorological changes associated with variations in terrain and therefore provides more precise meteorological parameters than MM4 data offers.

Regulatory agencies in some regions already require MM5 data for CALPUFF analyses, and agencies nationwide will likely begin requiring MM5 data within the next year.

CALPUFF’s more accurate characterization of atmospheric dispersion, especially with MM5 data, can lead to less conservative modeling results than other models provide. This increased accuracy maximizes operational flexibility for facilities that may face regulatory barriers when using models like ISCST3 and AERMOD.

Trinity's experience with CALPUFF and MM5 data distinguishes them by providing clients with a viable, cutting-edge alternative to traditional, less sophisticated meteorological data sets that may produce overly conservative modeling results.

U.S. Regulatory Approval of CALPUFF

As a newly approved regulatory model, many regulators are requiring applicants to utilize CALPUFF to quantify Class I area air impacts. This requirement poses a challenge for industry, as the CALPUFF modeling system requires considerable expertise and computing resources to execute, and its complexity can delay the permitting process.

The BREEZE team can obtain and process the extensive meteorological data needed to generate the meteorological input files for CALPUFF. This can be done for virtually any surface and upper air sites over any domain size and resolution.

Purchasing CALPUFF Data

Quick Turnaround on Processed Data

Preparing meteorological data for CALPUFF modeling is extremely time-intensive due to the numerous processing steps involved and very large data files. However, Trinity's extensive database of readily available data, worldwide resources for data acquisition, computing infrastructure, and professional staff of meteorologists allow Trinity to bring you available data in a timely manner. Electronic delivery may be available, dependent upon the size and quantity of data files.

Raw Data Processing

Provide Trinity with raw data and their trained meteorologists can process the data for input to the models. They will work with your data set to ensure it is correctly formatted and complete prior to processing, and process it according to EPA guidelines.
 

View Tech Sheet

Purchasing
Breeze CALMET Software