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Tropospheric dispersion: The first ten days after a puff release
Author(s) -
Maryon R. H.,
Buckland A. T.
Publication year - 1995
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49712152802
Subject(s) - dispersion (optics) , environmental science , atmospheric dispersion modeling , troposphere , meteorology , turbulence , atmospheric sciences , planetary boundary layer , diffusion , particle (ecology) , scale (ratio) , latitude , synoptic scale meteorology , boundary layer , turbulent diffusion , mechanics , physics , geodesy , geology , chemistry , optics , thermodynamics , quantum mechanics , air pollution , oceanography , organic chemistry
Dispersion from a puff released in the atmospheric boundary layer in mid‐latitudes is simulated with a Lagrangian global multiple‐particle model using analysed three‐dimensional wind fields. Quantitative measures of the spread are computed and used to assess the influence of the synoptic system into which the puff is released, and the ways in which turbulent diffusion can contribute to the total spread. the nature of the dispersion over ten days is examined to elucidate the controlling meteorology and kinematics during the various phases which could be identified. the results are compared with measurements made from constant‐level balloons. A time index is proposed to characterize large‐scale dispersion from a point source.