Interaction of Typhoons with the Taiwan Orography. Part I: Upstream Track Deflections

Yeh, Tien-Chiang; Elsberry, Russell L.

doi:10.1175/1520-0493(1993)121<3193:iotwtt>2.0.co;2

Cited by 113 publications

(112 citation statements)

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“…Also the propagation of TCs without sustained circulation is shown to be strongly dependent on the perturbation of the low level flow. In addition, Yeh and Elsberry (1993) show that deflection is larger for weak and slow cyclones whereas intense and fast cyclones pass across the island with a more continuous track, in agreement with Wang (1980). At the same time, Chang et al (1993) showed that the development of a secondary low was linked to the presence of the TC centre in a specific area including southeastern Taiwan region and the ocean area to the east-southeast of it.…”

Section: S Jolivet Et Al: a Numerical Study Of Orographic Forcing Osupporting

confidence: 83%

A numerical study of orographic forcing on TC Dina (2002) in South West Indian Ocean

et al. 2013

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Abstract. Using the French non-hydrostatic mesoscale numerical model Méso-NH, intense tropical cyclone (TC) Dina (2002) is simulated to investigate the forcing caused by the steep orography of Réunion island (20.8 • S, 55.5 • E) in the southwest Indian Ocean. The model initialised by a bogus vortex derived from Doppler radar observations reproduces quite well the dynamical characteristics of TC Dina approaching the island and provides some clues on the orographic influence on the structure and the evolution of the TC.The presence of the island is observed to stabilise the cyclonic circulation by damping the natural elliptical eyewall rotation and forcing the flow circulation. Initially, the cyclonic flow is blocked upwind of the orography which induces a convergence associated with upward vertical velocities, intense precipitation and maximum horizontal winds along the upwind slopes of the island. A mountain wave, generated over the highest terrains, is associated with downward motions on the lee side. When the strongest winds reach the island, the flow changes its behaviour from passing around to over the island. Non-dimensional flow parameters in agreement with recent theories are calculated to explain TC track.

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Section: S Jolivet Et Al: a Numerical Study Of Orographic Forcing Osupporting

confidence: 83%

A numerical study of orographic forcing on TC Dina (2002) in South West Indian Ocean

et al. 2013

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“…1), where low-level air in valleys and on mountain sides is often stagnant, with a region of strong wind over the coastal area (Harada 1981;Fujibe 1990), resulting in a wind pattern like C3. Moreover, the TC track itself can be deflected by orography (Yeh and Elsberry 1993a;Lin et al 2002) so as to pass around the Central Mountains onto the Kanto plain. On the other hand, the high frequency of C1 and C4 in southern and western Kyushu, and the Kii peninsula, is likely to correspond to the land-sea disposition with coastlines on the western side, where small friction at sea surface intensifies the winds in the left semicircle and results in small right-left asymmetry.…”

Section: Summary and Remarksmentioning

confidence: 99%

Classification of Surface Wind Fields of Tropical Cyclones at Landfall on the Japan Main Islands

Fujibe¹,

Kitabatake²

2007

Journal of the Meteorological Society of Japan

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A statistical study was made for surface wind fields of tropical cyclones (TCs) at landfall on the main islands of Japan using the AMeDAS data. The analysis was performed for 70 TCs which made landfall on the southern part (south of 36 N) of the main islands during the period 1979-2004. The wind field within 200 km of each storm center was obtained by applying a composite analysis to hourly or tenminute observations for the four hours around landfall, with the direction of storm motion as the y-axis. Then the fuzzy c-means method (FCM), which is a kind of cluster analysis, was applied to classify the wind distribution. All but one of the resulting five patterns show stronger winds on the right side of the center than on the left, with different degrees of right-left asymmetry and the shapes of the strong wind area. The five patterns have some differences in the preferred season, central pressure, speed and direction of motion, and regions of landfall of storms. A supplementary analysis using the wind profiler data, available from 2001, reveals that the right-left asymmetry is roughly explained by the storm motion, although the storm-relative wind fields still have some asymmetry.

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“…Observational analyses of typhoon tracks made by Wang (1980) indicated that westward-moving typhoons with continuous tracks tended to deflect southward upstream of Taiwan, and then move cyclonically over the CMR. Meteorological factors and processes related to this track deflection have been studied extensively by numerical simulations, including: storm intensity and translation speed (Bender et al 1987;Yeh and Elsberry 1993a), blocking and channeling flows (Lin et al 1999), and modification of the steering flows (Chang 1982;Bender et al 1987;Wu 2001). Utilizing various factors from previous studies, Lin et al (2002) and Lin et al (2005) identified control parameters for storm track continuity and deflection over Taiwan.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Typhoon Dot (1990) during TCM-90:Typhoon Dot¡¦s Discontinuous Track Across Taiwan

Jian¹,

Lee²,

Chen³

2006

Terr. Atmos. Ocean. Sci.

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Interaction of Typhoons with the Taiwan Orography. Part I: Upstream Track Deflections

Cited by 113 publications

References 0 publications

A numerical study of orographic forcing on TC Dina (2002) in South West Indian Ocean

A numerical study of orographic forcing on TC Dina (2002) in South West Indian Ocean

Classification of Surface Wind Fields of Tropical Cyclones at Landfall on the Japan Main Islands

Numerical Simulation of Typhoon Dot (1990) during TCM-90:Typhoon Dot¡¦s Discontinuous Track Across Taiwan

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