The District has meteorological data sets for modeling sources in the San Joaquin Valley. Meteorological data are available from two sources: 1) the National Climatological Data Center (NCDC) and 2) the MM5 Numerical Model. NCDC data were collected at major airports in the Valley. These data can be used for health risk assessments and ambient air quality analyses. The data derived from the MM5 numerical model are for sites where there are no airports. MM5- derived data can be used for health risk assessments only.
All meteorological data sets have been processed with AERMET, Version 18081_UStar and compiled from one-minute data using AERMINUTE with a wind speed threshold of 0.50 m/s. AERMET adjusted Friction Velocity (u*). In AERMOD, the non-default option of “Adjusted Friction Velocity (u*) in AERMET (ADJ_U*)” must be used. No low wind options can be used.
The meteorological monitoring sites located within the San Joaquin Valley can be referenced in the interactive map and KML file below.
The latest meteorological data sets can be downloaded from the District’s server on the page linked below.
District
District Meteorological Processing Procedures (2 mb)
Meteorological Data Template – zip file (326 kb)
Please note, the use of any non-District proposed meteorological data must be reviewed and approved by the District before it is used in an air quality dispersion model and/or health risk assessment.
