Interactions between downslope flows and a developing cold-air pool

Paul Burns, C. Chemel

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)
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Abstract

A numerical model has been used to characterize the development of a region of enhanced cooling in an alpine valley with a width of order (Formula presented.) km, under decoupled stable conditions. The region of enhanced cooling develops largely as a region of relatively dry air which partitions the valley atmosphere dynamics into two volumes, with airflow partially trapped within the valley by a developing elevated inversion. Complex interactions between the region of enhanced cooling and the downslope flows are quantified. The cooling within the region of enhanced cooling and the elevated inversion is almost equally partitioned between radiative and dynamic effects. By the end of the simulation, the different valley atmospheric regions approach a state of thermal equilibrium with one another, though this cannot be said of the valley atmosphere and its external environment.

Original languageEnglish
Pages (from-to)57-80
JournalBoundary-Layer Meteorology
Volume154
Issue number1
Early online date29 Aug 2014
DOIs
Publication statusPublished - 1 Jan 2015

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