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Cross‐valley vortices in the Inn valley, Austria: Structure, evolution and governing force imbalances

Babić, Nevio 1; Adler, Bianca; Gohm, Alexander; Kalthoff, Norbert 1; Haid, Maren; Lehner, Manuela; Ladstätter, Paul; Rotach, Mathias W.
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)


Exchange of momentum and scalars in the mountain boundary layer is achieved through an interaction of meso-to-microscale motions, occurring to varying extents depending on the combined effect of thermally driven as well as dynamically driven forcings. One such motion, known as a secondary circulation, results from a horizontal force imbalance across a curved valley segment, wherein the centrifugal force towards the outside of the valley bend can create a pressure gradient force in the opposite direction. The lack of adequate measurement strategies capable of sampling such motions in curved mountain valleys explains the near-absence of any observational evidence of secondary circulations there. The goal of the CROSSINN (Cross-valley flow in the Inn valley investigated by dual-Doppler lidar measurements) campaign, conducted in a curved segment of the Inn valley, Austria, was to determine the character of the cross-valley flow by means of a coplanar retrieval applied to a multi-Doppler wind lidar configuration. A signature of a secondary circulation, hereafter referred to as a cross-valley vortex, stood out particularly during intense daytime upvalley flow episodes. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000138467
Veröffentlicht am 04.10.2021
DOI: 10.1002/qj.4159
Zitationen: 3
Zitationen: 6
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 10.2021
Sprache Englisch
Identifikator ISSN: 0035-9009, 1477-870X
KITopen-ID: 1000138467
HGF-Programm 12.11.31 (POF IV, LK 01) New observational systems and cross platform integration
Erschienen in Quarterly journal of the Royal Meteorological Society
Verlag John Wiley and Sons
Band 147
Heft 740
Seiten 3835-3861
Vorab online veröffentlicht am 29.09.2021
Nachgewiesen in Dimensions
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