Remote Sensing Observations of Effects of Mountain Blocking on Travelling Gravity-Shear Waves and Associated Clouds

Reinking, Roger F.; Frisch, A. S.; Orr, Brad W.; Korn, D.; Bissonnette, Luc; Roy, G.

doi:10.1023/a:1025865421606

Cited by 4 publications

(1 citation statement)

References 23 publications

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“…In addition, the high SLD concentration caused ice accretion in areas unprotected by anti-icing systems, forcing flight termination. Stationary gravity waves are commonly dominated by cloud droplets smaller than 20 μ m but, in 2 m/s updrafts, drop sizes between 50 and 500 μ m can prevail, generating the greatest risk of aircraft icing [ 75 ].…”

Section: Meteorological Analysismentioning

confidence: 99%

Weather Features Associated with Aircraft Icing Conditions: A Case Study

Fernández‐González

Sánchez

Gascón

et al. 2014

The Scientific World Journal

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In the context of aviation weather hazards, the study of aircraft icing is very important because of several accidents attributed to it over recent decades. On February 1, 2012, an unusual meteorological situation caused severe icing of a C-212-200, an aircraft used during winter 2011-2012 to study winter cloud systems in the Guadarrama Mountains of the central Iberian Peninsula. Observations in this case were from a MP-3000A microwave radiometric profiler, which acquired atmospheric temperature and humidity profiles continuously every 2.5 minutes. A Cloud Aerosol and Precipitation Spectrometer (CAPS) was also used to study cloud hydrometeors. Finally, ice nuclei concentration was measured in an isothermal cloud chamber, with the goal of calculating concentrations in the study area. Synoptic and mesoscale meteorological conditions were analysed using the Weather Research and Forecasting (WRF) model. It was demonstrated that topography influenced generation of a mesolow and gravity waves on the lee side of the orographic barrier, in the region where the aircraft experienced icing. Other factors such as moisture, wind direction, temperature, atmospheric stability, and wind shear were decisive in the appearance of icing. This study indicates that icing conditions may arise locally, even when the synoptic situation does not indicate any risk.

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Section: Meteorological Analysismentioning

confidence: 99%

Weather Features Associated with Aircraft Icing Conditions: A Case Study

Fernández‐González

Sánchez

Gascón

et al. 2014

The Scientific World Journal

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Observational Techniques: Sampling the Mountain Atmosphere

Banta

Shun

Law

et al. 2012

Springer Atmospheric Sciences

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Instability of a stratified boundary layer and its coupling with internal gravity waves. Part 2. Coupling with internal gravity waves via topography

Zhang

2008

J. Fluid Mech.

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The aim of this paper is to show that the viscous shear instability identified in Part 1 is intrinsically coupled with internal gravity waves when a localized surface topography is present within a boundary layer. The coupling involves two aspects: receptivity and radiation. The former refers to excitation of shear instability modes by gravity waves, and the latter to emission of gravity waves by instability modes. Both physical processes are studied using triple-deck theory. In particular, the radiated gravity waves are found to produce a leading-order back action on the source, and this feedback effect, completely ignored in the acoustic analogy type of approach, is naturally taken into account by the triple-deck formalism. A by-product is that for certain incident angles, gravity waves are over-reflected by the boundary layer, i.e. the reflected waves are stronger than the incident waves.

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Remote Sensing Observations of Effects of Mountain Blocking on Travelling Gravity-Shear Waves and Associated Clouds

Cited by 4 publications

References 23 publications

Weather Features Associated with Aircraft Icing Conditions: A Case Study

Weather Features Associated with Aircraft Icing Conditions: A Case Study

Observational Techniques: Sampling the Mountain Atmosphere

Instability of a stratified boundary layer and its coupling with internal gravity waves. Part 2. Coupling with internal gravity waves via topography

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