Table of Contents - The Atmospheric Studies Group at TRC

Section 9: CALPUFF
9.15.9 Mass Balance List File (MASSBAL.DAT)
Mass balance results for all species in the run are reported to the list file MASSBAL.DAT.
MASSBAL.DAT is a formatted text file that identifies the CALPUFF version and level, echoes the 3-line
title of the CALPUFF simulation, identifies the output as hourly mass balance (g), sets out column
headings to label each variable listed, and then reports changes in the mass of each species in the entire
modeling domain for each hour in the simulation. The date and time of each output record marks the time
at the end of the hour, where midnight is hour zero of the new day (CALPUFF convention).
An example list file is provided in Table 9-63. The first five columns after the species name identify the
hourly change in mass due to emissions, transport out of the domain, chemical transformation, and
depletion (wet and dry deposition). The last three columns report the current mass totals at the end of the
hour, and the portion that is in the surface mixed layer, and above the mixed layer. A single record is
written for each species and each hour of the simulation.
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