Plume Dispersion in the Convective Boundary Layer. Part 2. Analyses of CONDORSField Experiment Data

摘要

During the 1970s convective scaling (CS) emerged as a powerful tool fordescribing the most salient characteristics of turbulence and diffusion in convective boundary layers (CBLs). At the same time, controversy arose as both laboratory and numerical diffusion modeling experiments showed marked, systematic departures of diffusion in the vertical from patterns predicted by standard Gaussian models. Around 1975 it became apparent that there was a need for a full-scale diffusion field experiment during convective conditions, both to test the effectiveness of CS and to verify or refute the non-Gaussian behaviors found in the modeling experiments. First, the question of whether the modeling results could be verified for the more basic case of passive plumes had to be addressed. The CONDORS (convective diffusion observed with remote sensors) experiment was designed as an attempt to answer this question. Part I of this paper gave a detailed account of the experimental design and execution; the experiment will be only briefly redescribed here. The core of this paper is an in-depth, but not exhaustive, analysis of the experimental measurements.