A preliminary evaluation of ADPIC (atmospheric diffusion particle-in-cell) model performance on selected ANATEX (Across North America Tracer Experiment) releases using observed, analyzed, and dynamically predicted winds

Conference · Tue May 01 00:00:00 EDT 1990

OSTI ID:6856550

Rodriguez, D J; Cederwall, R T

Work was undertaken to expand the domain of application of the mesoscale atmospheric diffusion particle-in-cell (ADPIC) model to the hemispheric scale. It was decided that the acquisition and software manipulation of large volumes of wind observations over continental or hemispheric scales would cause unacceptable delays in ARAC's response to an emergency situation. Consequently, arrangements were made to obtain processed fields of winds, which the Air Force Global Weather Central (GWC) produce on a routine basis. Until the recent release of the Across North America Tracer Experiment (ANATEX) database, there have been few opportunities for testing whether the GWC wind fields provide an accurate depiction of large-scale flow features between sources and samplers. The ANATEX database provides a fertile ground for testing the sensitivity and uncertainty of long-range models. The primary purpose of this paper is to focus on a single aspect of modeling uncertainty --- the wind fields that describe the advection component of a transport and diffusion calculation. The ANATEX database has been used to evaluate the performance of ADPIC based on the use of wind-field products from three different sources: the GWC's Whole Mesh Grid covering the northern hemisphere, a more refined grid of advection velocities generated by in-house interpolative procedures applied to rawinsonde data and supplementary soundings in the source-receptor region, and dynamically consistent u, v and {omega} fields from the National Oceanic and Atmospheric Administration's Nested Grid Model. 7 refs., 4 figs.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOD
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6856550
• Report Number(s): UCRL-JC-103969; CONF-900534-1; ON: DE90010638
• Resource Relation: Conference: 18. NATO/CCMS international technical meeting on air pollution modelling and its applications, Vancouver (Canada), 13-17 May 1990
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ADVECTION
MATHEMATICAL MODELS
ORGANIC FLUORINE COMPOUNDS
ENVIRONMENTAL TRANSPORT
DATA BASE MANAGEMENT
DATA COVARIANCES
DIFFUSION
ENVIRONMENTAL IMPACTS
LAGRANGIAN FUNCTION
SENSITIVITY ANALYSIS
TRACER TECHNIQUES
WIND
FUNCTIONS
ISOTOPE APPLICATIONS
MANAGEMENT
MASS TRANSFER
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)