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DTSTAMP:20250509T001553Z
DESCRIPTION:Large-eddy simulations of sea breezes over a mountainous island
 \n\nAbstract\n\nMountains and coastlines both favor the development of the
 rmally-driven diurnal circulations\, including slope flows induced by elev
 ated heating and land/sea breezes generated by differential heating of lan
 d and water bodies. Although slope flows and sea-breeze circulations have 
 each been studied intensively using observations and numerical simulations
 \, the interactions between the two remain only partially understood. In p
 articular\, some studies suggest an enhancement of the sea breeze in the p
 resence of coastal orography while others point to a blocking or weakening
  effect. To gain insight into these interactions\, we conduct a series of 
 large-eddy simulations of daytime airflow over an idealized Gaussian-shape
 d island terrain. We analyze the simulated sea-breeze propagation characte
 ristics and frontal-circulation strength under varying environmental and t
 opographic factors\, including island geometry (width\, terrain height and
  steepness)\, boundary-layer static stability\, and ambient winds. The res
 ults suggest that inland orography accelerates the sea-breeze front inland
  but also causes a weakening of the baroclinicity and frontal circulation.
  Over sufficiently tall mountains\, the latter effect causes the sea-breez
 e front to vanish entirely as it ascends the slope. The mountain effects o
 n the sea breeze are quantified by tracking the frontogenesis terms and al
 ong-front vertical motion in a sea-breeze-following reference frame. This 
 analysis suggests that the mountain upslope flow acts much like an onshore
  ambient wind: it hastens the inland frontal propagation but also induces 
 strong frontolysis\, both of which scale with the mountain height. The pot
 ential for sea-breeze blocking at the foot of the mountain is also assesse
 d through a simple Boussinesq scaling.\n
DTSTART:20151104T193000Z
DTEND:20151104T203000Z
LOCATION:Room 934\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Student Seminar: Chun-Chih (David) Wang
URL:/meteo/channels/event/student-seminar-chun-chih-da
 vid-wang-255058
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