We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Idealized simulations of the effect of local and remote topographies on tropical cyclone tracks.
- Authors
Tang, Chi Kit; Chan, Johnny C. L.
- Abstract
This is the second part of a study on the effect of topography on tropical cyclone (TC) tracks. In Part I, idealized simulations using the Weather Research and Forecast (WRF) Model were conducted with artificial TCs inserted at a location such that they make landfall on the central part of Taiwan and the Luzon. In this second part, the effects of local and remote topographies are studied by examining the tracks of several TCs approaching Taiwan at different latitudes. Tropical cyclones approaching to the south of Taiwan (remote effect) slow down and are first deflected southwestward and then northward. Moreover, a sharp northward deflection occurs for a TC passing further south of Taiwan, but the deflection is small for a TC passing further north of Taiwan. In the presence of China's terrain, an additional larger but weaker anticyclonic gyre is induced so that the TC is affected, even when it is further away from the land. The flow associated with this gyre reduces the northward deflection caused by the Taiwan terrain but enhances the southwestward shift of the TC. However, nocyclonic gyre is found over in land China if the TC is far away from China's coast, probably because of the irregular elevated topography. For TCs making landfall on South China, a westward shift is found just prior to landfall, which ismore significant if the height of China's terrain is doubled. This westward shift can be explained by the horizontal advection, vertical advection and diabatic heating terms in the potential-vorticity tendency equation.
- Subjects
TROPICAL cyclones; CYCLONE tracks; TOPOGRAPHY; VORTEX motion; COMPUTER simulation
- Publication
Quarterly Journal of the Royal Meteorological Society, 2015, Vol 141, Issue 691, Part B, p2045
- ISSN
0035-9009
- Publication type
Article
- DOI
10.1002/qj.2498