baroclinic disturbance

baroclinic disturbance

[¦bar·ə¦klin·ik di′stər·bəns]
(meteorology)
Any migratory cyclone associated with strong baroclinity of the atmosphere, evidenced on synoptic charts by temperature gradients in the constant-pressure surfaces, vertical wind shear, tilt of pressure troughs with height, and concentration of solenoids in the frontal surface near the ground. Also known as baroclinic wave.
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References in periodicals archive ?
The second AR formed and persisted in conjunction with three distinct pulses of enhanced water vapor transport in rapid succession linked to three successive low-level baroclinic disturbances, respectively, which included two mesoscale frontal waves and a strong cyclone (not shown).
The southwesterly flow, forced between an elongated area of low geopotential heights, comprising the latter two of the aforementioned baroclinic disturbances (L symbols in Fig.
From these combined results, we conclude that the rapid succession of two ARs with embedded low-level baroclinic disturbances described in the section "Synoptic-scale conditions for early February 2017" was responsible for producing this extreme 10-day precipitation event.
The presence of upper-level baroclinic disturbances during low-SST formation events motivates a development pathway-specific analysis of the relevance of an SST-based threshold for cyclogenesis.