Parameterization of Overwater Diffusion: Separation of Relative Diffusion and Meander
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Authors
Skupniewicz, C. E.
Schacher, G. E.
Vaucher, G. T.
Subjects
Diffusion
Turbulence
Meander
Atmospheric modeling
Planetary boundary layer
Turbulence
Meander
Atmospheric modeling
Planetary boundary layer
Advisors
Date of Issue
1986-02
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
Data compiled from surface releases of SF6 gas in a purely over-water environment are used to parameterize both relative and single-particle diffusion in the lateral direction. Relative diffusion is found to be adequately described by surface layer stability for ranges to 10 km. Single-particle diffusion, often referred to as meander, is not found to be strongly related to surface layer stability, but does correlate well with measured lateral wind direction variance. Taylor's (1921) "near field" approximation closely predicts the single-particle lateral diffusion for these data, suggesting that meander is dominated by very large scale turbulence, even when considering travel times of 30-60 minutes.
Type
Technical Report
Description
Series/Report No
Department
Organization
Naval Environmental Prediction Research Facility
Identifiers
NPS Report Number
NANENVPREDRSCHFAC CONTRACTOR REPORT CR 86-02
Sponsors
Naval Air Systems Command
Funding
N6685685WR85019
Format
Citation
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.