Recorded presentation14B.3
Downstream Development of the Summertime TC/Sub-monthly Wave Pattern in the Extratropical North Pacific
Ken-Chung Ko, National Kaohsiung Normal Univ., Kaohsiung, Taiwan; and H. H. Hsu
The impact of tropical perturbation on the extratropical wave activity in the North Pacific in the sub-monthly time scale is demonstrated here. Previous studies identified a tropical cyclone (TC)/sub-monthly wave pattern, which propagated north-northwestward in the Philippine Sea and re-curved in the oceanic region between Japan and Taiwan. This study found that after the arrival of the TC/sub-monthly wave pattern at the recurving region, the eastward-propagating wave activity in the extratropical North Pacific was significantly enhanced. It is suggested that the TC/sub-monthly wave pattern, which is originated in the tropical western North Pacific, initiates the eastward energy propagation of Rossby-wave-like perturbation in the extratropical North Pacific and may have impact on the long-range weather predictability in the eastern North Pacific and western North America.
Session 14B, Tropical Cyclones and Large-scale Circulations
Thursday, 13 May 2010, 1:15 PM-3:00 PM, Arizona Ballroom 2-5
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