NAM6: Batch Code for the Navy Aerosol Model

Abstract

This report describes the operation of a computer program that calculates optical extinction according to the Navy Aerosol Model (NAM). The Navy Aerosol Model is an empirical model describing the size distribution of aerosol particles close to the surface of the open ocean. The model depends on four parameters: (1) p, the dimensionless air mass parameter; (2) W, the average wind speed (m s(-1) during the previous 24 hours; (3) w, the current wind speed (m s(-1); and (4) U, the relative humidity (%). These parameters completely specify dN/dr, the particle size distribution in the Navy Aerosol Model. The information in this report refers solely to the sixth version of the Navy Aerosol Model (NAM6), the version that is the kernel of the Navy Oceanic Vertical Aerosol Model. When NAM6 runs on a 333 MHz Pentium II computer, an input file containing a thousand lines will execute in slightly less than 1 minute. This speed is obtained with default precision settings for which the absolute accuracy is measured as approximately 5% for extinction and 10% for phase. Program precision is under the control of the user, however, and accuracy may be increased, up to a point, by increasing precision and sacrificing speed.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1999
Accession Number
ADA370997

Entities

People

  • C. R. Zeisse

Organizations

  • Naval Information Warfare Systems Command

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Accuracy
  • Air Masses
  • Computer Programs
  • Computers
  • Equations
  • Extinction
  • Humidity
  • Materials
  • Military Research
  • New York
  • Operating Systems
  • Optical Properties
  • Optics
  • Particle Size
  • Particles
  • Precision
  • Refractive Index

Readers

  • Atmospheric Remote Sensing.
  • Computational Modeling and Simulation
  • Parallel and Distributed Computing.